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Adsorption of 1,3-propanediol from synthetic mixture using polymeric resin as adsorbents

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Frontiers of Chemical Science and Engineering 2009年第1期3卷 52-57页

作者： W.LUERRUK A.SHOTIPRUK V.TANTAYAKOM P.PRASITCHOKE C.MUANGNAPOH Department of Chemical Engineering Faculty of EngineeringChulalongkorn UniversityBangkok 10330Thailand Department of Innovation and Technology PTT Chemical Public Company LimitedRayong 21150Thailand

The aim of this work was to separate 1,3-PDO from a synthetic mixture using polymeric resins,Amberlite XAD-7 and XAD-16 *** equilibrium adsorption of 1,3-PDO onto two polymeric resins were investigated in binary and tertiary *** results of binary component adsorption equilibrium indicated that the adsorption capacity(q)of 1,3-PDO at 160 g/L onto XAD-7 and XAD-16 was 835.96 and 584.61 mg 1,3-PDO/g dry resin,*** adsorption isotherms were closely predicted by the Langmuir-Freundlich model among the two isotherm model *** value of n of 1,3-PDO adsorbed on XAD-7 are much higher than those on *** result suggested that XAD-7 resin has a higher afﬁnity for the 1,3-PDO adsorption than XAD-16 ***,the value of adsorption capacity of 1,3-PDO in the binary and tertiary component were compared at the same *** the tertiary system,although the selectivity of 1,3-PDO from XAD-7 was approximately six times higher than XAD-16,the adsorption capacity of 1,3-PDO at 160 g/L onto XAD-16 was higher than ***,the reusability of XAD-7 and XAD-16 resins in the three cycle times shows a slight loss of adsorption ***,the investigation about desorption by an ethanol/water mixture at 50%(V/V)indicated that the desorption yield of 1,3-PDO from XAD-7 was lower than XAD-16 resin for both the binary and tertiary *** was due to the more favorable adsorption characteristics of XAD-7 resin than XAD-16 resin.

关键词： adsorption 1 3-propanediol glycerol poly-meric resin adsorption isotherm

Separation of 1,3-propanediol from glycerol-based fermentations of Klebsiella pneumoniae by alcohol precipitation and dilution crystallization

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Frontiers of Chemical Science and Engineering 2007年第2期1卷 202-207页

作者： GAO Sujun ZHANG Daijia SUN Yaqin XIU Zhilong Department of Bioscience and Biotechnology School of Environmental and Biological Science and TechnologyDalian University of TechnologyDalian 116024China

The separation of 1,3-propanediol from the glycerol-based fermentation broth of Klebsiella pneumoniae plays an important role during the microbial production of 1,*** this paper,the separation of 1,3-propanediol from fermentative broth by a combination of ultrafiltration and alcohol dilution crystallization was *** broth was first filtered by ultrafiltration,and 99%of cells,89.4%of proteins and 69%of nucleic acids were *** obtained broth was further condensed by vacuum distillation,and then alcohol was *** macro-molecular impurities,such as nucleic acids,polysaccharides and proteins,were precipitated,and inorganic and organic salts were *** optimal volume ratio of alcohol added to the condensed fermentation broth was determined to be 2:*** a result,proteins,nucleic acids and electric conduc-tivity decreased by 97.4%,89.7%and 95.8%,respectively,compared with the fermentative *** influences of pH and water content in condensed broth on alcohol precipi-tation and dilution crystallization were also *** experimental results indicated that alcohol precipitation and dilution crystallization was feasible and effective for the separation of 1,3-propanediol from actual fermentation broth.

关键词： 1 3-propanediol alcohol precipitation and dilution crystallization glycerol fermentation ultrafiltration Klebsiella pneumoniae

Selective hydrogenolysis of glycerol to 1,3-propanediol over Pt-W based catalysts

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Chinese Journal of Catalysis 2020年第9期41卷 1311-1319页

作者： Jia Wang Man Yang Aiqin Wang College of Forestry Northwest A&F UniversityYangling 712100ShaanxiChina CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

The selective hydrogenolysis of glycerol to 1,3-propanediol(1,3-PDO)is an attractive reaction due to the high demand for valorization of huge excess amounts of glycerol supply as well as the important application of 1,3-PDO in polyester ***,the formation of 1,3-PDO is thermodynamically less favorable than 1,2-PDO,which necessitates the development of efficient catalysts to manipulate the reaction kinetics towards the 1,3-PDO *** others,Pt-W based catalysts have shown promising activities and selectivities of 1,3-PDO although the reaction mechanism is not well addressed at the molecular *** this short review,we have compared the performances of different Pt-W based catalysts and discussed the key factors influencing the activity and *** possible reaction mechanisms have been discussed in terms of the synergy between Pt and WO_x and the origin of acid ***,the long-term stability of the Pt-W catalysts has been *** hope this review will provide useful information for the development of more efficient catalysts for this important reaction.

关键词： Glycerol Hydrogenolysis 1 3-propanediol Pt-W based catalysts

Isolation of New Strains of Bacteria Able to Synthesize 1,3-propanediol from Glycerol

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Advances in Microbiology 2013年第2期3卷 171-180页

作者： Daria Szymanowska-Powalowska Agnieszka Drozdzyńska Natalia Remszel Department of Biotechnology and Food Microbiology Poznań University of Life Sciences Poznan Poland

The natural environment is inhabited by many species that exhibit very specific metabolic activities that may find industrial applications. The aim of the study was to select non-pathogenic cultures of bacteria of the genus Clostridium and lactic acid bacteria able to convert glycerol into 1,3-propanediol (1,3-PD). Another aim of this study was to identify the isolates that best produced 1,3-propanediol both from pure and crude glycerol. The most efficient strains identified (Cl. butyricum) were analysed on a bioreactor scale. The aim was to determine temperature conditions on the efficiency and duration of 1,3-PD synthesis. The species Clostridium were identified using amplification of the 16S rRNA coding sequence. A total of 123 isolates (of the genus Clostridium and lactic acid bacteria) were isolated;a vast majority of these were able to synthesize 1,3-PD. The best results were obtained for Cl. butyricum strain DSP1, which was isolated from the rumen of a cow fed with glycerol. The strain efficiency using pure glycerol on bioreactor scale 0.65 mol/mol of glycerol at a temperature of 38℃ and a constant pH of 7.0.

关键词： Clostridium spp. Bacteria Isolation 1 3-propanediol Glycerol Conversion Microflora of Natural Environment

Isolation and Identification of Alkali-Resistant 1,3-propanediol Producing Strain

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Advances in Microbiology 2016年第12期6卷 917-926页

作者： Zhifang Zhao Caifang Wen Guang Rong Ruiqing Liu Jianguo Xu Qingping Hu College of Life Science Shanxi Normal University Linfen China

1,3-propanediol is a promising renewable resource produced by microbial production. It is mainly used in many synthetic reactions, particularly applied to the polymer synthesis and cosmetics industry. We described here the isolation of strain ZH-1, which has the ability of high production with 1,3-propanediol, from Fenhe River in China. It was classified as a member of K. pneumoniae after the study of phenotypic, physio-logical, biochemical and phylogenetic (16S rDNA). The initial glycerol concentration, fermentation time and pH value of strain ZH-1 were determined to be 50 g·L-1, 36 h and 8.0. Under these conditions, the practical yield of 1,3-PD was 18.53 g·L-1 and a molar yield (mol1,3-PD molGlycerol-1 of 1,3-propanediol to glycerol of 0.497. In addition, we found that for the strain ZH-1, the optimum grown pH was 9.0, so we can deter-mine that it is a new member of alkali-resistant strains.

关键词： 1 3-propanediol K. pneumoniae Identification Alkali-Resistant

Aqueous Two Phase Extraction for the Recovery of 1,3-propanediol from Its Aqueous Solutions

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Advances in Materials Physics and Chemistry 2012年第4期2卷 154-157页

作者： Min Hee Chung Yeon Ki Hong Hyoung Wook Lee Sung-Jun Park Department of Chemical and Biological Engineering Korea National University of Transportation Chungju Chungbuk 380-702 Korea Department of Energy System Engineering Department of Mechanical Engineering Korea National University of Transportation Chungju Chungbuk 380-702 Korea

As the biodiesel production is rapidly enhanced, the crude glycerol, which is by-product of biodiesel processes, is state of surplus. 1,3-PDO (1,3-propanediol), a valuable monomer of poly(trimethylene terephthalate) (PTT), can be produced from the fermentation process using crude glycerin as a carbon source. For the economic biological production of 1,3-PDO, the low cost and high efficient separation processes is essential. In this study, aqueous two-phase system composed of various hydrophilic alcohols and salt was used as a primary separation step for 1,3-PDO. It was found that the aqueous two-phase systems are easily formed with decreasing of the polarity of alcohols. The extraction efficiency is proportional to the polarity of alcohols. In case of methanol or ethanol/K2HPO4, the extraction efficiency was more than 90%.? It was concluded that the aqueous two-phase extraction using methanol or ethanol/K2HPO4 can be applied? for the primary separation of 1,3-PDO? as an alternative to a conventional primary separation processes.

关键词： 1 3-propanediol Alcohols Phase Separation Extraction Efficiency

Optimizing Control of Bio-dissimilation Process of Glycerol to 1,3-Propanedlol

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Chinese Journal of Chemical Engineering 2008年第1期16卷 128-134页

作者：徐恭贤邵诚修志龙 Institute of Advanced Comrol Technology Dalian University of Technology Dalian 116024 China Department of Bioscience and Biotechnology Dalian University of Technology Dalian 116024 China

An iterative optimization strategy is proposed and applied to the steady state optimizing control of the bio-dissimilation process of glycerol to 1,3-propanediol in the presence of model-plant mismatch and input constraints. The scheme is based on the Augmented Integrated System Optimization and Parameter Estimation （AI- SOPE） technique, but a linearization of some performance function in the modified model-based optimization problem of AISOPE is introduced to overcome the difficulty of determining an appropriate penalty parameter. When carrying out the iterative optimization, the penalty coefficient is set to a larger value at the current iteration than at the previous iteration, which can promote the evolution rate of the iterative optimization. Simulation studies illustrate the potential ofthe approach presented for the optimizing control of the bioTdissimilation process of glycerol to 1,3-propanediol. The effects of measurement noise, measured and unmeasured disturbances on the proposed algorithm are also investigated.

关键词： steady state optimizing control iterative optimization bio-dissimilation process 1 3-propanediol penalty coefficient model mismatch

Stannous oxalate: An efficient catalyst for poly(trimethylene terephthalate) synthesis

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Science China Chemistry 2008年第3期51卷 257-262页

作者： JIA ShuYong REN YuRong ZHANG Dan HU Jing ZENG Yi WANG GongYing Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041China College of Chemistry Jilin Normal UniversitySiping 136000China Changzhou Institute of Chemistry Changzhou 213164China Graduate University of Chinese Academy of Sciences Beijing 100039China

A complete study on the catalytic activity of stannous oxalate for poly(trimethylene terephthalate) (PTT) synthesis via esterification method is carried out by comparison to the well known catalysts (tetrabutyl titanate (TBT), dibutyltin oxide (Bu2SnO), and stannous octoate (SOC)). Their catalytic activity in the esterification process is monitored by measuring the amount of water generated, while intrinsic viscosity (IV) and content of terminal carboxyl groups (CTCG) are used as the index in the polycondensation process. Stannous oxalate shows higher activity than the other catalysts. Decrease in reaction time and improvements in PTT property are observed. The higher catalytic activity of stannous oxalate is attributed to its chelate molecular structure.

关键词： stannous oxalate poly(trimethylene terephthalate) 1 3-propanediol esterification method

Effect of promoters on the selective hydrogenolysis of glycerol over Pt/W-containing catalysts

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Chinese Journal of Catalysis 2016年第9期37卷 1513-1520页

作者： Jia Wang Nian Lei Chaojun Yang Yang Su Xiaochen Zhao Aiqin Wang State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China

Diverse promoters,including noble metals（such as Ru,Ir and Rh） and transition metal oxides（such as Re,La,Fe,Zr,Sn and Ce oxides） were introduced into Pt/WOx and Pt/WOx/Al2O3 catalysts to investigate the ability of these promoters to modify activity and selectivity during glycerol hydrogenolysis to 1,*** these,La exhibited the greatest promotional effect;the introduction of 0.1% La to the Pt/WOx improved activity,selectivity and stability,although the significant increase in selectivity came at the cost of a slight activity loss in the case of the Pt/WOx/Al2O3 *** electron microscopy,high angle annular dark field scanning tunneling electron microscopy and NH3-temperature programmed desorption all demonstrated that the introduction of La generates a greater quantity of acidic sites on the catalyst surface,and that the majority of the La species are associated with Pt *** of the other additives resulted in only minimal improvements or even detrimental effects with regard to both activity and selectivity,although some appear to improve the stability of the catalyst.

关键词： Glycerol Hydrogenolysis 1 3-propanediol Tungsten oxide Promoter