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There are 102 papers published in subject: since this site started. |
Results per page: | 102 Total, 11 Pages | << First < Previous 8 9 10 11 |
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1. Cloud Points of Hydrocarbon Surfactants in Supercritical | |||
Lv Xiaobo ,Su Baogen ,Ren Qilong | |||
Chemical Engineering 13 September 2005 | |||
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Abstract:n recent years, the research on reversed micelles in the continuous supercritical CO2 phase has attracted much attention due to the characteristic that reversed micelles in the supercritical CO2 can solubilize many polar and high molecular weight or hydrophilic molecules, such as amino acids, proteins and many polymers. Unfortunately, many surfactants used in the reversed micelles were fluorinated surfactants and silicanes, which have potential toxicity and cost high. Otherwise only few references about reversed micelles with hydrocarbon surfactants, which can get rid of the shortcomings, have been reported. So the formation of W/C microemulsions with hydrocarbon surfactants is of significant industrial interest. In this work, cloud points of the hydrocarbon surfactants, A(EO)9(PO)2 and A(EO)9(PO)3, were measured in a high-pressure Variable-Volume optical cell. Experiments were operated at the concentration range 0.54-1.5 wt%, and at the temperature range 35-55 ℃. Cloud points pressu | |||
TO cite this article:Lv Xiaobo ,Su Baogen ,Ren Qilong . Cloud Points of Hydrocarbon Surfactants in Supercritical[OL].[13 September 2005] http://en.paper.edu.cn/en_releasepaper/content/2869 |
2. Selective adsorption property of collagen fibre adsorbent for tea polyphenols | |||
Liao Xue-pin,Lu Zhong-bing,Deng Hui, Du Xiao,DU Xiao | |||
Chemical Engineering 04 April 2005 | |||
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Abstract:A novel adsorbent was prepared based on cattle hide collagen fibres. It was found that the collagen fibre adsorbent can selectively adsorb galloylated catechins (EGCG, GCG and ECG) from tea polyphenols (TP) with the extent of adsorption higher than 90%. The extent of adsorption for C, EGC and EC was relatively lower. In case of caffeine, the extent of adsorption was only 11.2%, imply that most of caffeine was left in residual solution. Eluted by acetone-water solution, the purified TP was obtained in which the total content of EGCG, GCG and ECG was 93.8% whilst the content of caffeine was decreased from 9.7% in original TP to 0.04%. The recovery rates of EGCG, GCG and ECG were higher than 80%. Further studies showed that the adsorption selectivity of hide collagen fibre adsorbent to the components of TP is related with their molecular structures. | |||
TO cite this article:Liao Xue-pin,Lu Zhong-bing,Deng Hui, Du Xiao, et al. Selective adsorption property of collagen fibre adsorbent for tea polyphenols[OL].[ 4 April 2005] http://en.paper.edu.cn/en_releasepaper/content/1783 |
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