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

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

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LLDPE/TiO_2 nanocomposites produced from different crystallite sizes of TiO_2 via in situ polymerization

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Chinese Science Bulletin 2012年第17期57卷 2177-2184页

作者： CHAICHANA Ekrachan PATHOMSAP Somsakun MEKASUWANDUMRONG Okorn PANPRANOT Joongjai shotipruk Artiwan JONGSOMJIT Bunjerd Chemistry Program Faculty of Science and TechnologyNakhon Pathom Rajabhat UniversityNakhon Pathom 73000Thailand Faculty of Engineering Department of Chemical EngineeringCenter of Excellence on Catalysis and Catalytic Reaction EngineeringChulalongkorn UniversityBangkok 10330Thailand Faculty of Engineering and Industrial Technology Silapakorn UniversityNakhon Prathom 26000Thailand

Nano-TiO2 particles with a range of crystallite sizes were synthesized by a conventional sol-gel method,and then used as nanoparticle substrates in the synthesis of LLDPE/TiO2 nanocomposites via in situ polymerization of ethylene/1-hexene with zirconocene/MMAO *** was found that the size of the nano-TiO2 crystallite nanoparticles can influence the catalytic activity in the polymerization *** larger nano-TiO2 crystallites provided better catalytic activity in the polymerization system due to more space for monomer *** addition,by thermo-gravimetric analysis,it can be seen that the larger nano-TiO2 crystallites also exhibited lower interaction with available ***,the MMAO reacted more efficiently with the zirconocene catalyst during the activation process,and enhanced polymerization *** the polymer nanocomposites products did not have well defined melting temperature indicating non-crystalline *** is due to the high amount of hexene incorporation(based on 13C NMR).The difference in crystallite sizes of the nano-TiO2 also affected how 1-hexene became incorporated into the polymer *** smaller crystallite size of nano-TiO2 allowed greater 1-hexene incorporation due to depression of the reactivity of the *** contribution of this work helps develop a better understanding of the role of nano-TiO2 in the catalytic activity of the polymerization system and in the microstructure of the polymer composite ***,this study only considers work on the laboratory scale,so for commercial application of these results,it is necessary to scale up the polymerization *** is only at this stage,that other physical properties,such as the mechanical properties of these materials can be sensibly determined.

关键词：聚合物纳米复合材料纳米二氧化钛颗粒晶粒尺寸原位聚合高分子复合材料锆催化剂聚合体系 TiO2微晶

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