CHULALONGKORN UNIVERSITY
Bangkok, TH
CHULALONGKORN UNIVERSITY Patent applications | ||
Patent application number | Title | Published |
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20140200374 | METHOD OF EXTRACTING LUTEIN/XANTHOPHYLLS FROM NATURAL MATERIALS AND HIGHLY PURIFIED LUTEIN/XANTHOPHYLLS OBTAINED FROM THE METHOD THEREOF - The present invention provides the new method for extracting lutein from natural materials wherein the said method comprises of modification of natural lutein ester in the natural materials to free lutein and/or low molecular weight lutein ester, extraction of the said natural materials with supercritical fluid at the optimal conditions. The said method yields high amount of crude lutein with high purity due to the mild condition used for extraction. Therefore, no degradation of the desired product is occurred. The crude lutein can be further purified with chromatography in order to obtain the highly purified lutein. The method according to this invention can be applied to the extraction of xanthophylls or others beside lutein. | 07-17-2014 |
20090061096 | SMALL BLOCK COPOLYMER OF POLYIMIDE - A method of making a block polyimide copolymer containing a first small block copolymer segment and a second larger block segment includes the steps of (a) reacting a first aromatic acid dianhydride with an aromatic diamine in a molar ratio from about 10:100 to about 50:100, respectively, to obtain the small block copolymer, (b) reacting the small block copolymer and excess amount of diamine with a second acid dianhydride in such a quantity that a total aromatic acid dianhydride and a total aromatic diamine are equimolar to obtain a precursor solution containing the first small block copolymer segment and the second larger block segment, (c) forming a film, laminate, or coating on a substrate, and (d) cyclodehydrating the film, laminate, or coating by chemical or thermal imidization. | 03-05-2009 |