| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5202091df9de019fc995f2d266f9ecc2 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C281-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C239-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C281-02 |
| filingDate |
1985-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_52941a7aad6cdcfe4c1c89dc37c6e889
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e3f8d1890d822bb36f704ca3a3bb514
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc9984ffb12cee5e865ff128d3b64783 |
| publicationDate |
1985-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0163526-A1 |
| titleOfInvention |
Process for preparing hydrazodicarbonamide |
| abstract |
An improved process for preparing hydrazodicarbonamide comprising:n (a) reacting urea with hydrazine in a solvent at a temperature of from about 105°C to about 140°C and at a pressure of at least about 15 psig for a sufficient amount of time to form an aqueous reaction mixture which is substantially free of hydrazine and comprises water, unreacted urea, semicarbazide, and ammonia; and (b) then converting said reaction mixture into hydrazodicarbonamide; nwherein the improvement comprises (c) passing an inert gas through said reaction mixture during step (b) to sweep out ammonia from said reaction mixture; (d) removing substantially said ammonia from said inert gas; and (e) recycling said ammonia-depleted inert gas back to said reaction mixture. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101420706-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0544475-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100473333-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03035601-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100618947-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100335795-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100348578-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100345874-B1 |
| priorityDate |
1984-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |