Tailored triacylglycerols and esters.

摘要: T h e ability of extracellular microbial lipases t o remain catalytically active in predominantly organic reaction sys(ems containing vcry small amounts f water is now well known. Under these conditions the enzymes can be used as effective catalysts for ii wide range esterification and transestcrificntion reactions. high yields cster products being obtained because normal hydrolytic action restricted by limitcd availability water. This paper discusses use reactions synthesis fatty acid esters production modified triacylglycerols. At present substances are produced oleochemical edible fat industries chemical esterificntion. interesterification hydrogenation processes. potential advantages using enzyme technology cithcr placc r addition procedures arc found specificity catalysis mild under which enzymic processes operated. Lipasecatnlyscd run without generation byproducts :associated with usc more severe procedures. giving improved product and/or better quality. specificities lipases, particularly their regioand stereo-specificities, exploited generate difficult obtain triacylglycerols targeted possible have values L I O/kg rates varying from 500 to 50 000 tonnes/annum. They iare not high-value, lowtonnage products. For this reason, successful materials cnr.yme rcquires development highly productive, efficient reactor systems.