http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112250661-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-0249 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-12 |
| filingDate | 2020-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112250661-B |
| titleOfInvention | A kind of method for catalyzing synthesis of lactide |
| abstract | The invention discloses a method for catalyzing and synthesizing lactide. A mixture of stannous lactate and urea substances is used as a composite catalyst. L-lactic acid (or D-lactic acid) with a lactic acid content of 90% is used as a raw material, and a vacuum distillation technology is adopted. Synthesis of L-lactide (or D-lactide), compared to using one of the catalysts alone, the use of a composite catalyst can effectively improve the yield, under the same experimental conditions, using stannous lactate or urea alone The crude yields of synthesizing lactide with similar catalysts are 69%-72% and 23%-30%, respectively, and the composite catalysts of the two can be increased to more than 90%. Compared with traditional tin-based catalysts or zinc-based catalysts and other composite catalytic components, the composite catalytic reaction system of the present invention has a low reaction temperature (150-180° C.), a short reaction time (0.5-2h), and lactide yields. High rate (above 90%), more energy saving and production increase, which is beneficial to industrialized production. |
| priorityDate | 2020-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 71.