Synthesis method and device for rapidly producing lactide at high yield
US11926608B2 · kind B2 · utility
0Cited by
4References
12Claims
0Family size
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Key dates
| Filing date | Mar 4, 2021 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Jun 15, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00186
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention discloses a synthesis method and device for rapidly producing lactide at high yield. The method comprises: adding a single component of lactic acid or two components of lactic acid and catalyst, passing the mixture through a mixer to enter an oligomer preparation system, increasing a residence time through bottom circulation, synthesizing oligomeric lactic acid, and passing a gas-phase component through a rectification system. With the adoption of the device, the lactide is capable of being efficiently synthesized, crude lactide with a yield of 94% to 98% is capable of being obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.