http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111662210-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C231-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C227-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-20 |
| filingDate | 2020-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111662210-B |
| titleOfInvention | Method for preparing hexamethylene diamine key intermediate 6-aminocapronitrile by two-step method |
| abstract | The invention provides a method for preparing a key intermediate 6-aminocapronitrile of hexamethylene diamine by a two-step method. The method comprises the following steps: step S1, in a first reactor, after caprolactam is subjected to hydrolysis reaction in an aqueous solution, introducing first hot ammonia gas into the first reactor to obtain a crude aminocaproamide, wherein the temperature of the first hot ammonia gas is 150-250 ℃; and step S2, carrying out catalytic dehydration on the aminocaproamide crude product and second hot ammonia gas in a second reactor to obtain aminocapronitrile, wherein the temperature of the second hot ammonia gas is 200-300 ℃. As the polymerization of the hydrolysate is effectively controlled in the step S1, the polymerization of the polymer on the surface of the catalyst is effectively relieved when the aminocaproamide crude product participates in the catalytic dehydration reaction in the step S2, the coking of the catalyst is avoided, the service life of the catalyst is prolonged, and the preparation of the 6-aminocapronitrile with high conversion rate and high selectivity lasting caprolactam is further ensured. |
| priorityDate | 2020-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.