Method for producing polylactic acid
US11118006B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 2020 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Dec 30, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00772
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure relates to the technical field of biotechnology and polymer synthesis, and discloses a method for producing polylactic acid, the method comprises the following steps: (i) inoculating a lactic acid fermentation strain into a lactic acid fermentation culture medium to perform a fermentation, so as to obtain a fermentation broth containing lactate; (ii) separating the fermentation broth to obtain a lactic acid; (iii) synthesizing a polymer-grade lactide by using the lactic acid as a raw material; (iv) subjecting the polymer-grade lactide to a polymerization reaction in a polymerization reaction device to obtain a polylactic acid. Through the above technical solution, the polylactic acid can be efficiently produced in the present disclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.