http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110818572-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C245-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C245-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-42 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-55 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-42 |
| filingDate | 2019-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110818572-B |
| titleOfInvention | Synthetic method of p-phenylenediamine |
| abstract | The invention relates to a synthetic method of p-phenylenediamine, belonging to the technical field of organic material preparation. The invention adopts aniline as raw material, and produces 4-amino azobenzene through diazotization reaction and heating rearrangement reaction, and adds right amount of acid to separate out the product. Dissolving 4-aminoazobenzene in a proper solvent, adding a catalyst, performing hydrogenation reduction reaction, filtering, and distilling under reduced pressure to obtain a p-phenylenediamine product, wherein aniline is recovered as a byproduct and can be recycled as a raw material. Compared with the existing production method of p-phenylenediamine, the preparation method of the invention has the advantages of safe and environment-friendly preparation process, less discharge of three wastes, easily obtained reaction raw materials, simple and convenient reaction steps and high purity of the finally prepared product, thus the method has good industrial implementation prospect. |
| priorityDate | 2019-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.