The process of obtaining poly (acid lu00c1tico) using acid, 12 - tungstofosfu00d3rico supported on activated carbon as catalyst heterogu00caneo

摘要

The process of obtaining poly (acid lu00c1tico) using acid, 12 - tungstofosfu00d3rico supported on activated carbon as catalyst heterogu00caneo. The present invention relates to a process for the production of poly (lactic acid) from the mixture racu00eamica D, L lactic acid using acid catalyst of br0nsted heterogeneous.More specifically, the present invention provides the production of poly - L - lactic acid by a polycondensation reaction facilitated by 12 - tungstofosfu00f3rico acid supported on activated carbon.This catalyst has some advantages compared to the conventional homogeneous catalysis can be recovered after the production process, and can be reused in a new cycle reaction via a simple thermal treatment on the solid acid.In addition, this catalyst is highly selective and estereoespecu00edfico for this type of polymerization without causing apparent by-products, using such a mixture racu00eamica as starting monomer, a fact which helps to decrease, in high degree, the cost of production of the polu00edme Ro.