ID: 57080
Title: Thermal explosion simulation of hydrogen peroxide in three types of vessels by explosion models
Author: Meng-Lung Lin, Kun-Yue Chen, Sheng-Hung Wu, Yung-Chuan Chu, Sun-Ju Shen and Chi-Min Shu
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Hydrogen peroxide, vent sizing package 2 (VSP2), thermal explosion, maximum temperature (Tmax), maximum pressure (Pmax)
Abstract: Hydrogen peroxide (H2O) which has highly reactive and exothermically unstable features, has been extensively employed in the chemical industry. It has caused many thermal explosion and runaway reaction accidents during manufacturing processes in the last four decades in Taiwan. Japan, Korea and China. The goal of this study was to simulate upsets by H2O2 for an emergency response. Vent sizing package 2 (VSP2) was used to determine the thermokinetics of 20 mass% H2O2. A numerically simulated model was adopted to simulate thermal explosion development and thermokinetic data of runaway reaction for three types of vessels of 20 mass% H2O2. Important parameters, such as maximum temperature (Tmax), maximum pressure (Pmax), etc. were necessary and useful for investigating the emergency response procedure in terms of industrial applications.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57079
Title: Removal of Pb(II), Zn(II) and Cd(II) from hydrometallurgical effluent by ferrite formation
Author: Li Dou and Li Dongwei
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Heavy metal wastewater, Hydrometallurgical effluent, XRD, ferrite, extraction toxicity
Abstract: The hydrometallurgy industry discharge large numbers of heavy metal wastewater annually in China, especially during the production of Germanium extracted from Lead and Zinc oxide ore. The effluent contains Pb(II), Zn(II) and Cd(II) and the concentration is 7.0, 50.0 and 4.12 mg/L respectively. In this research, the XRD was introduced to detect the ferrite generated in chemical coprecipitation. The crystal structure of ferrite may play a important role in parceling heavy metal ions. The hydrometallurgical effluent quality treated by chemical coprecipitation and ferrite combined process was excellent. The extraction toxicity of ferrite was far below the allowed standard concentration. It was also found that the removal efficiency is optimal when the pH is from 8.86 to 9.24 and the temperature is from 400 C to 600C.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57078
Title: Optimized extraction protocol for extracellular polymeric substances (EPS) from two activated sludges
Author: Liyun Ge, Huanhuan Deng, Hongwei Gao and Feng Wu
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Activated sludge, extracellular polymeric substances (EPS), extraction, cation exchange resin (CER)
Abstract: Extracelluar polymeric substances (EPS) are significant components of activated sludge. They are considered important in the removal of pollutants from wastewater, in bioflocculation, in settling and in dewatering of activated sludge. The present paper investigates the extraction efficacies of EPS from two different activated sludges. One chemical method (NaOH), two physical methods (cation exchange resin, heating) and a control method (centrifugation alone) were tested and cation exchange resin was found to be an effective extraction method. We also optimized the cation exchange resin (CER) procedure in extraction time, the dose of CER and the stirring intensity. Results show that CER was most effective in extracting EPS for all sludge samples; only 0.73%and 1.61% of DNA in all sludges were detected within 16 hr of extraction time, suggesting the EPS isolated were not contaminated by intracellular substances. For each grom of volatile solids, CER extracted 74 mg and 80 mg of EPS from the two sludges respectively. Carbohydrate and protein were main components of both EPS. Optimization of CER extraction procedures showed the best extraction time was 8 hr and higher total mass of EPS was harvested by CER method with higher stirring intensity and CER dose.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57077
Title: Abnormal levels of lanthanides in common beverages: A study by ICP-MS
Author: Williams J R , Pillay A E and Al-Asmi S K
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Coffee, inductively coupled plasma -mass spectrometry, lanthanides, tea
Abstract: This study found abnormal concentrations of lanthanides in five Indian teas and four coffees (Brazilian, Indian and Turkish) popular currently in the Middle East. This is of concern, because some lanthanides could have adverse health effects in humans. The original aim of this study was to obtain baseline concentrations as reference data, but elevated levels were encountered. Average levels of lanthanides in tea on a dry mass basis across the five bands were 10-100 times literature values and ranged as follows: La 3.78-3.98, Ce 3.49-4.04, Pr 1.81 - 1.86, Lu 1.17-1.24, Tm 1.02-1.08, Nd 4.72-7.97, Eu 2.33-2.43, Gd 4.83-5.28, Tb 1.29-1.37, Dy 3.67-3.83, Ho 1.20-1.27 and Er 3.48-3.63 ?g/g. For the four coffee brands, the corresponding concentrations were again 10 -100 times higher than literature values and were : La 4.00-4.38, Ce 4.05-11.1, Pr 1.93-2.15, Lu 1.28-1.41, Tm 1.05-1.22, Nd 5.07-5.41, Eu 2.40-2.57, Gd 5.24-7.57, Tb 1.34-1.51, Dy 3.90-4.20, Ho1.29-1.42 and Er 3.70-3.99 ?g/g (dry mass). Some of these elements have never been studied in tea and coffee before. Specifically, Lu, Tm, Eu, Tb and Ho in tea and Pr, Nd, Ho and Er in coffee have not appeared in the chemcial literature before. The impact of lanthanides on human health is reviewed. Quantitation was achieved by inductively coupled plasma-mass spectrometry.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57076
Title: Inorganics accumulation in low-sludge wastewater treatment technique: Case study of SBR with sonication
Author: Zhang Panyue and Zhang Guangming
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Excess sludge minimization, inorganics accumulation, SBR, sonication
Abstract: Large amount of excess sludge imposes great environmental pollution and high handling cost and hence, excess sludge reduction techniques are of great importance. However, inorganics might accumulate in the activated sludge when less excess sludge was discharged. This paper analyzed in detail the accumulation of inorganics in a subsequent batch reactor (SBR) with ' sonication-cryptic growth ' method to reduce excess sludge. Results showed that for the treatment of normal urban sewage, ' sonication-cryptic growth ' effectively reduced the excess sludge by around 50%, inorganics accumulation in sludge was insignificant, sludge bioactivity was stable but the effluent turidity slightly increased. On the other hand, for the treatment of artificial wastewater with 500 mg/L inorganics addition, the inorganics accumulated significantly in the activated sludge and counted for 72% of sludge dry weight after 20 d. Correspondingly, the sludge bioactivity reduced by 55.6%. As a result, the effluent turbidity reached 42 NTU and the COD removal efficiency dropped from 88% to 67%. Interestingly, sonication could improve the sludge bioactivity, reduce the inorganics accumulation and enhance the effluent quality while reducing the amount of excess sludge by around 20%. Therefore, ' sonication - cryptic growth ' method did not cause the accumulation of inorganics in sludge and might even improve the sludge activity when high turbidity wastewater was treated.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57075
Title: Sorption and separation of Lead (II) using poly [dibenzo-18-crown -6] in L-valine medium
Author: Jadhav Deepali V, Sabale Sandip R and Mohite Baburao S
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Pb(II), poly[dibenzo-18-crown-6], L-valine, column chromatography
Abstract: A column chromatographic separation method has been developed for separation of Pb(II) using poly[dibenzo-18-crown-6]. The separation was carried out in L-valine medium. The sorption of Pb(II) was quantitative from 1 x 10-6 M to 1 x 10-2 M L-valine. The capacity of column of poly[dibenzo 18 -crown-6] for Pb(II) was found to be 0.86+ 0.01mmol/g of crown polymer. The result showed that 1.0 M to 8.0 M hydrochloric acid, 4.0 M to 7.0 M hydrobromic acid, 1.0 M to 8.0 M sulfuric acid and 4.0 M to 6.0 acetic acid and 2.0 M to 4.0 M perchloric acid were found to be efficient eluents. Pb(II) was separated from commonly associated metal ions such as Mg(II)/Sb(III), Co(II), Zn(II), Hg(II), Ni(II), Cd(II) and Th(IV) and other associated metal ions in binary as well as in multicomponent mixtures. The sorption of Pb(II) was carried out in presence of various ions to ascertain the tolerance limits of individual. The lead content was determined in type metal alloy. The simple, rapid and selective method having good reproductivity (approximately+ 2%) was developed.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57074
Title: Synthesis and study of Bimeric Cu (II), Ni (II), Mn(II) and Co (II) complexes with Schiff base ligands derived from primary aliphatic amines with 3-acetyl-4-hydroxy-6-methyl-5-(phenyldiazenyl)-2H-pyran-2-one
Author: Chandole S S , Pachling S P and Shirodkar S G
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Dehydroacetic acid (DHA), Azo-Schiff ' s base
Abstract: Schiff base ligands derived from 3-acetyl-4-hydroxy-6-methyl-5-(phenyldiazenyl)-2H-pyran-2-one and primary aliphatic amines have been synthesized and characterized by their elemental analysis, UV, IR and NMR studies. These ligands were used to synthesize Cu(II), Ni(II), Mn(II) and Co(II) complexes. The complexes were characterized by elemental analysis, magnetic moment, molar conductance along with electronic, infrared and XRD spectral anaysis, Octahedral geometry around these metal ions have been proposed on the basis of magnetic and spectral studies. The fungicidal activities of the ligands and their metal complexes have been screened in vitro against A. niger and the % inhibition is found to be in the order Cu>Ni>Mn>Co.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57073
Title: Coordination polymers of N, N ' - Di-(8- Hydroxyquinolinolyl-5-methyl)-N, N ' Dimethyl-1, 4 But-2-enediamine (QMBD)
Author: Patel Sunil P, Prajapati N K, Patel Asha D and Jain Swanti
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Coordination polymers, bidentate bisligand, IR and diffuse reflectance spectral studies, thermogravimetry, magnetic susceptibility, number average molecular weight
Abstract: Coordination polymer containing a novel bis - (bidentate) ligand, namely N, N ' -di(8-hydroxyquinolinolyl-5-methyl)-N,N ' -dimethyl-1,4-but-2 enedia-mine (QMBD) was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride with N,N ' -dimethly-1,4-but-2-ene diamine in the presence of a base catalyst. The coordination polymers of this bis ligand QMBD have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn (II). All of these coordination polymers and the parent ligand QMBD were characterized by elemental analyses and IR spectral and diffuse reflectance spectral studies. The number-average molecular weights (Mn) of all the coordination polymers were determined by non-aqueous conductometric titrations. The thermal properties of all coordination polymers were determined by theremogravimetry. In addition, all the coordination polymers have also been characterized by their magnetic susceptibilities.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57072
Title: Synthesis, characterisation and antimicrobial activities of copper (II) and zinc (II) complexes of Schiff bases derived from amino acids and 1, 10 - Phennathroline mixed ligands
Author: Peter Ndifon T, Agwara Moise O, Njapba Julius N, Yufenyi Mbom D, Paboudam Awawou G and Nyamen Lynda D
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Schiff bases, 1, 10-phenanthroline, copper (II), zinc (II), animicrobial activities
Abstract: Copper (II) and Zinc (II) complexes of Schiff bases and 1, 10-phenanthroline mixed ligands have been synthesized in aqueous /methanolic solution. These complexes were characterised by elemental analyses, infrared and visible electronic spectroscopy. The results suggest a distorted octahedral coordination for Cu(II) and Zn (II) complexes in which the central metal ion is bonded to O-, N- and O- donor sites of the imino-N, phenoxyl-O and carboxyl-O groups respectively. Antimicrobial studies on the ligands and the metal complexes show that the ligands, salicylidene alanine (Sal-Al) and salicylidene histidine (Sal-His) are active against 3 out of the 8 tested organims while the copper complex Cu (Sal-Ala) phen is active against 4 of the pathogens. The zinc complex Zn(Sal-Ala) phen is active against 7 of the pathogens. None of them is active against the fungus, Candida albicans.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57071
Title: Computer augmented modeling studies on complexes of lanthanone ions with creatinine in dioxane-water mixtures
Author: Sharma Sangita, Patel Ashish, Bhalodia Jasmin, Ramani Jayesh and Vora J J
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Creatinine, BEST FIT model, Lanthanone ions, dioxane-water mixture, stability constant
Abstract: Chemical speciation of La(III), Ce(III), Pr (III), Nd(III), Sm(III), Gd(III) and Dy (III) complexes of creatinine was studied at 300C in 10%, 20%, 30%, 40%, 50%, 60% v/v dioxane - water mixtures and ionic strength was maintained as 0.2 M (NaClO4). Titration data were obtained on the basis of Irving-Rossotti technique and data were pruned with computer program PKAS & BEST. The active forms of ligand are LH+ & L which were obtained with SPEPLOT. The dominant species of complexation are ML, ML2 and ML(OH3). The stability of complexes that formed has increased with increasing dioxane content. The change in stability constants with change in dielectric constant of medium is explained on the basis of cation solvating nature of cosolvent, specific solvent-water interaction, specific interaction of cosolvent with solute, electrostatic and non-electrostatic effects. The effects systematic errors on stability constants are also studied. The order for these effects is dissolved carbon dioxide > alkali> acid> ligand> metal. The trends of transportation and the availability of lanthanide ion for complexation can be explained on the basis of distribution diagrams and the stability constants of complexes so formed.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57070
Title: Effect of earthworms on nutrients dynamics in soil and growth of crop
Author: Mayilswami Srinithi and Reid Brian
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Bioremediation soil, earthworm, nutrient, plant growth
Abstract: Effects of earthworm especially with Lumbricus terrestris on nutrients dynamics and on plant growth were studied in the laboratory. Soil was amended with varied levels of compost and earthworms were introduced: 60.9 g soil alone, 60.9 g soil + 20.78 g compost (60:40), 60.9 g soil + 41.57 g compost alone (80:20) and 41:57 g compost alone. The ion chromatography data showed there was significant variation in the nutrient status mainly nitrite, nitrate, ammonium and phosphate between the treatments (with worms) and control (devoid of worms). The signifcant variation in nitrite concentration was observed in treatment containing 60.9 g soil + 20.78 g compost which was around 6.32 (mg/kg). Phosphate concentration was predominant in treatment having 41.57 g compost alone with 23.855 mg/kg concentration. The amount of ammonium varied slightly, though major concentration around 6.90 mg/kg was observed in treatment with 41.57 g compost alone. The difference in nutrient status appeared to be due to the vairations in nutrient cycling probably ascribable to the earthworm ' s activities.
Pot experiment showed that the mustard plant growth was stimulated by earthworms digging capacity. The germination percentage, shoot length, root length and fresh biomass were determined. The variations between treatments and controls were measured. The average germination percentage in treatment containing 60.9 g soil + 20.78 g compost was 75.83 which was more significant. The total fresh biomass was measured to be 1.96 g more suggestive comapred to controls. These modifications emerged due to the active participation of earthworms in stirring of soil.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57069
Title: Water quality of Dhulikhel area, Nepal
Author: Shretha R A, Kafle B K and Sillanpaa M
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Physicochemical parameters, water quality, Dhulikhel
Abstract: This study consisted of the determination of the physicochemical properties of different types of untreated water in Dhulikhel area of Nepal. The aim was to ascertain the quality of river water, ground water and pond water. Only the concentration of chloride exceeded the permissible limits of the World Health Organization drinking water quality guidelines. The four out of five ponds had very low dissolved oxygen content. On an average, the water in this area was slightly polluted. A simple pre-treatment is enough to make the water potable.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57068
Title: Physico-chemical and heavy metals evaluation of polluted urban wetlands of Bangalore
Author: Jumbe Aboud S and Nandini N
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Surface water quality, urban wetlands, microwave digestion, atomic absorption spectrophotometer
Abstract: The urban aquatic ecosystems are strongly influenced by long term discharge of untreated domestic and industrial wastewaters, storm water runoff, accidental spills and direct solid waste dumping. All these released polluntants have a great ecological impact on the water quality of the urban wetlands. In carrying out the present study, a total of seventeen (17) lake systems located in three major valleys of Bangalore City - Vrishabarvarthy, Koramangla-Challagatta, and Hebbal with five (5) of its total six (6) lake series within these valley systems were selected. The chemical quality was compared with a series of local and international standards pertaining to drinking water as wel as tolerance limits for wetlands. Several physicochemical and heavy metal parameters were evaluated along with the irrigation, corrosion and productivity indices. Overall, the mean ionic concentrations showed the following pattern: Na>Ca>Mg>K>FE>CO>Pb>Cr>Ni>Cu>Zn>Mn>Cd. Sodium (188.85 mg/L) and Potassium exceeded the ground water guidelines limit of 175 and 12 mg/L respectively. K also exceeded the EU limit of 10 mg/L. Mg (37.6 mg/L) exceeded the BIS limits. Cu (0.33 ppm), Zn (0.28 ppm) and Mn (0.24 ppm ) were within the BIS maximum limit of 1.5, 5 and 0.3 ppm respectively. Although Cd (0.16 ppm) and Ni (1.01 ppm) exceeded the drinking water limits of 0.01 and 0.1 ppm (EPA) respectively, both metals were within the tolerance limits of inland surface water subject to pollution (2.0 and 3.0 ppm as prescribed in CPCB effluent discharge limits). Howeve,r Cr, Pb and Fe exceeded discharge limits (2.0, 0.1 and 3.0 ppm respectively). Anionic evaluation produced the following pattern:Cl>HCO3>SO4>NO3>PO4>CO3>F. Chlorides exceeded the BIS limit of 250 mg/L while Nitrates exceeded the ICMR highest desirable levels of 20 mg/L. These findings underline the increasing environmental pollution impact of these fragile urban wetlands and necessitate for a major policy shift in restoration and rejuvenation programs.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57067
Title: Photocatalytic decomposition of methylene blue over titanium dioxides doped with Yttrium ions prepared using low temperature combustion method
Author: Jung Won Young, Park Seong Soo, Lee Gun Dae, Lee Man Sig, Lee Gang-Woo and Hong Seong - Soo
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Nanosized TiO2 and yttrium ions doped TiO2 particles, low temperature combustion method, photocatalytic decomposition, methylene blue
Abstract: Nanosized TiO2 and yttrium ions dope TiO2 particles have been prepared using low temperature combustion method. The physical properties were investigated and we have also examined the activity of TiO2 particles as photocatalysts for the decomposition of methylene blue. From XRD results, the major phase of all TiO2 particles was an anatase structure regardless of doping of yttrium ions. It can be seen that no peak was observed above 7000C. The photocatalytic activity for the decomposition of methylene blue is proportional to the intensity of the PL peaks of the yttrium doped TiO2 particles. The doping of 1.0 mole% yttrium oxide on the TiO2 enhanced the photocatalytic activity and showed the higher activity than P-25 used as a commercial catalyst. In additiona, the titania particles calcined at 6000C showed the highest photocatalytic activity.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 57066
Title: Study on Copolymerization of CO/Styrene with [CH3C4Py]+PF6- as Novel reaction medium
Author: Jintang Guo, Shan Gao, Yakai Feng and Jing Wang
Editor: Dr Shankar Gargh
Year: 2010
Publisher: Research Journal of Chemistry and Environment, Vol 14 (2), June 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: Research Journal of Chemistry and Environment
Keywords: Ionic liquids, Palladium composite catalyst, carbon monoxide, styrene, polyketones
Abstract: In this paper, pyridine (N-methylimidazole), bromoalkane, potassium hexafluorophosphate (sodium fluoborate) were used to prepare eleven ionic liquids, which were further applied to the copolymerization of CO and styrene as reaction medium. NMR, IR, XPS, TEM were employed to prove the prepared poly (1-oxo-2-phenyltrimethylene) was high crystal and strictly alternating copolymer. Effect of various ionic liquids on the copolymerization was studied to identify that the optimal ionic liquid to the copolymerization was 1-butyl-4-methylpyridine hexafluorophosphate which was then used as solvent of the CO/Styrene reaction. Moreover, effect of volume of ionic liquid, reaction temperature, reaction time, consumption of p-benzoquinone and ligands were also studied in detail. Results showed that the highest catalytic activity reached 723.34gSTCO/(gPd-h) with the reaction conditions as follows: volume of ionic liquid = 3ml, temperature of reaction temperature =600, reaction time = 2h, molar ratio of P-benzoquinone/ acetate palladium = 80 and 0.0225 mmol, [Pd (N(CH3)-N(CH3))2[PF6]2 as composite catalyst; polyketones could still be obtained after 4 times recycles of the catalyst. The application of ionic liquids instead of tranditional solvents in the copolymerization of CO/Styrene supplied a feasible approach to reuse the catalyst and reduce the reaction cost.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None