http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110204700-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-83 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-183 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-83 |
| filingDate | 2019-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110204700-B |
| titleOfInvention | Method for efficiently preparing polytrimethylene terephthalate (PTT) |
| abstract | The invention relates to a method for efficiently preparing polytrimethylene terephthalate (PTT), which is implemented by using M in the process of preparing the PTT by esterification, prepolymerization and polycondensation of terephthalic acid and 1, 3-propanediol x Ti y O z The compound is used as a catalyst for high-efficiency catalytic preparation. In the catalyst, a metal M is an IIA element, the molar ratio of M to titanium x: y =1: 5-5: 1, titanate and a compound of M are added into a dihydric alcohol solution, the mixture reacts at 0-150 ℃ for 0.5-10 h, and then the mixture is filtered, washed, dried and calcined at 350-700 ℃ for 1-7 h to obtain the catalyst. The catalyst is used for preparing PTT, so that the esterification and polycondensation time is shortened, the intrinsic viscosity of the PTT is improved, the hue b value is reduced, the intrinsic viscosity of the PTT product is 0.91-1.15 dl/g, the b value is lower than 3.0, and the catalyst has a good industrial application prospect. |
| priorityDate | 2019-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 156.