Continuous process for the manufacture of a purified lactide from esters of lactic acid
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United States of America Patent
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Sep 21, 1993
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app pub date -
Aug 24, 1992
filing date -
Jan 24, 1992
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Abstract
A process for the continuous production of substantially purified lactide and lactide polymers from an ester of lactic acid including the steps of forming crude lactide in the presence of a catalyst means to form a condensation reaction by-product and polylactic acid and depolymerizing the polylactic acid molecules followed by subsequent purification of the crude lactide in a distillation system. A purified lactide is then polymerized.
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