EFFECT OF REACTION PARAMETERS ON SP435 LIPASE-CATALYZED SYNTHESIS OF CITRONELLYL ACETATE IN ORGANIC-SOLVENT

被引:95
作者
CLAON, PA [1 ]
AKOH, CC [1 ]
机构
[1] UNIV GEORGIA,DEPT FOOD SCI & TECHNOL,ATHENS,GA 30602
关键词
ENZYMATIC SYNTHESIS; ORGANIC SOLVENT; CITRONELLYL ACETATE; CANDIDA ANTARCTICA; LIPASE;
D O I
10.1016/0141-0229(94)90056-6
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The reaction parameters affecting the enzymatic synthesis of citronellyl acetate by direct esterification were studied. Reaction mixtures were prepared using 2 ml dry n-hexane, 0.1 M citronellol, 0.1 M acetic acid 10% (w/w) Candida antarctica lipase, SP435, incubated at 30 degrees C and 200 rev min(-1) for 24 h. A 98% molal conversion yield was achieved after 14 h incubation, the highest yield ever reported. Acetic acid concentrations >0.30 M inhibited the esterification activity of SP435. Optimum temperature was 20 degrees C, giving a yield of 98%. Addition of wafer to the reaction mixtures decreased the esterificatian activity of SP435. The highest yields were observed for solvents having log P values greater than or equal to 0.85. SP435 was able to give 95.6% conversion even after the tenth reuse, demonstrating its stability and efficiency under the conditions of this study.
引用
收藏
页码:835 / 838
页数:4
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