Methods of reproducing lactic acid components by using lactic ac

Details Methods of reproducing lactic acid components by using lactic ac Methods of reproducing lactic acid components by using lactic ac

1997-10-24

2000-05-09

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

560185, C07C 5908

Patent

active

060606223

ABSTRACT:
A lactic acid based by-product formed in a process of producing a lactic acid based composition is subjected to racemization in the presence or absence of a catalyst to thereby obtain a lactic acid component having substantially optical inactivity. Then, lactide or polylactic acid having optical inactivity can be obtained from the lactic acid component having the optical inactivity. The obtained lactide or polylactic acid is mixed with lactide or polylactic acid having an optical purity in a range of 90 to 100% e.e. at a predetermined ratio to thereby obtain lactide or polylactic acid having a desired optical purity.

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