http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108794439-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-88 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-88 |
| filingDate | 2017-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108794439-B |
| titleOfInvention | Preparation method of phthalide |
| abstract | The invention discloses a preparation method of phthalide. The method takes ortho-xylene as a substrate, and under the action of transition metal and a solid acid catalyst, the ortho-xylene is catalyzed and oxidized into phthalide with high selectivity. The method selects proper solid acid for catalysis, so that o-xylene can obtain o-hydroxymethylbenzoic acid in the oxidation process, and then the closed-loop product phthalide can be directly obtained under the action of acid catalysis. Compared with the traditional method for preparing phthalic anhydride by oxidizing o-xylene and preparing phthalide by hydrogenating phthalic anhydride, the method has the advantages of simple steps, high product yield, low material consumption and energy consumption. |
| priorityDate | 2017-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.