http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1170089-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5528d8d64c9da539b3fa8028a22bede6 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C245-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C06B25-34 |
| filingDate | 1967-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1969-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1170089-A |
| titleOfInvention | Process for the production of azodicarbonamide. |
| abstract | 1,170,089. Production of azodicarbonamide. OLIN MATHIESON CHEMICAL CORP. 17 Oct., 1967 [27 Oct., 1966], No. 47320/67. Heading C2C. Azodicarbonamide is obtained by (1) reacting hydrazine with at least a stoichiometric amount of urea in acid aqueous solution to form a first slurry of solid hydrazodicarbonamide in a first aqueous phase; (2) adding a stoichiometric excess of elemental bromine to said first slurry at a temperature of 20-60 C. to form a second slurry of solid azodicarbonamide in a second aqueous phase; (3) separating said solid azodicarbonamide from said second aqueous phase. In step (1) of the process the acid employed is preferably a halogen hydracid and the reaction is suitably effected by refluxing the mixture. The oxidation of step (2) is preferably effected by adding liquid bromine and the azodicarbonamide may subsequently be separated from the resulting slurry in a conventional manner. The slurry of azodicarbonamide before separation or the liquor after separation is advantageously neutralized, and the bromine contained in the liquor may be recovered by introducing chlorine thereinto or by treatment with a chlorinating agent, optionally in the presence of an inert gas. |
| priorityDate | 1966-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.