Air-isolated continuous feeding system for synthesizing polylactic acid from lactide and feeding method thereof
US11192079B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 29, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Dec 29, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J8/0055
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to the field of high polymer material manufacturing, and discloses an air-isolated continuous feeding system for synthesizing polylactic acid from lactide and a feeding method thereof. The continuous feeding system comprises a raw material bag/box and a raw material collector for collecting and outputting lactide, the raw material bag/box is connected with a shielding gas input pipeline, a discharge pipe is movably inserted into the raw material bag/box, a cyclone separator is connected downstream of the discharge pipe, and a solid substance outlet of the cyclone separator is connected with the raw material collector. According to the invention, deterioration of the lactide raw material incurred by moisture absorption and oxidation is avoided, and the reaction conversion ratio and final product purity are improved. The continuous feeding system is easy to operate, can save manpower and material resources, and is applicable to industrial application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.