کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10389900 | 884410 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lactic acid enantioseparation by means of porous ceramic disc and hollow fiber organic membrane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The d,l-lactic acid racemic mixture (d,l-LA) was used as model mixture to study the separation of the enantiomers using the chiral selector N-3,5-dinitrobenzoyl-l-alanine-octylester (l-SO). Two types of membrane separation were applied, namely supported liquid membrane and chiral solid membrane. In the first case the chiral selector dissolved in toluene was physically immobilised into the polypropylene hollow fiber membrane pores. In the case of the chiral solid membrane, the selector was introduced in a ceramic disc by means of its organic solution by ultrafiltration and than toluene solvent was evaporated from the pores. After its evaporation from the membrane, the l-SO selector should remain behind on the membrane internal phase by adsorptive bound or crystalline form. Both types of membrane processes could separate the enantiomers of lactic acid. The chiral solid membrane has better separation efficiency where fluxes of the d-lactic acid were changed between 4Â ÃÂ 10â4 and 15Â ÃÂ 10â4Â mol/(m2Â h) while the average selectivity could reach about 15. For supported liquid membrane these values were changed between 3Â ÃÂ 10â6 and 4Â ÃÂ 10â6Â mol/(m2Â h) as well as 1.2 and 2, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 41, Issue 3, 15 February 2005, Pages 299-304
Journal: Separation and Purification Technology - Volume 41, Issue 3, 15 February 2005, Pages 299-304
نویسندگان
Péter Hadik, Leventéné Kotsis, Margit Eniszné-Bódogh, Lujza-P. Szabó, Endre Nagy,