Catalyst for production of polylactic acid by direct polycondensation method

• Main Authors: LUAN YIXIAN, YU BO, FAN LING, HE YONG
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2008
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a rare-earth catalyst for directly condensating lactic acid to prepare polylactic acid. The catalyst is the one-component rare-earth compound C1 or the composite system of C1 and volatile C2, wherein C1 is rare-earth compound as rare-earth oxide, rare-earth halide, rare-earth...