http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114790279-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_88efe178af67c1491e8670b8defd3b3c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-06 |
| filingDate | 2021-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0b94b510be560b183e0c3cf6327c6aa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2bf7caeff80cc07d713cde80394e3790 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4bc6f227f4991d678332e6c824681f1a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c40205abb8e51adece0100b778939ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09d2b8c2a0ccb97c3fc956c2a801bdce http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23e0f1c934d54e027522f7fb1634ad79 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48770c79b62756b89e3bb73df3feea39 |
| publicationDate | 2022-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114790279-A |
| titleOfInvention | A kind of industrialized production process method of polyglycolic acid oligomer |
| abstract | The invention relates to an industrialized production process method of polyglycolic acid oligomer. The reaction material after mixing raw glycolic acid or glycolic acid ester with a catalyst is first subjected to a normal pressure reaction in a prepolymerization kettle, and the obtained prepolymerized product is then transferred to a reduced The deep polycondensation reaction is carried out in a vacuum state in the membrane reactor, that is, it is completed. Compared with the prior art, the present invention adopts the technology of combining the reaction kettle and the falling film reactor, improves the reaction separation effect and the conversion rate of glycolic acid or glycolic acid ester, improves the product yield, and the molecular weight distribution of the obtained oligomer is relatively high. Narrow, which is conducive to the next step of depolymerization, and can meet the requirements of industrial large-scale production. |
| priorityDate | 2021-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.