http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CS-230563-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_794c0541eeb177127ba84aa959f0316a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C239-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01C1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-04 |
| filingDate | 1979-04-04^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2434043a6b944cd3fe6ba0389af32ba http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22830360a90a0921c3c8a0b5f1fcf93a |
| publicationDate | 1984-08-13^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CS-230563-B2 |
| titleOfInvention | Method of integrate production of urea and ammonia |
| abstract | Urea is produced form a gaseous mixture of H2, N2 and CO2, e.g. that obtained by the steam reforming of hydrocarbons. Carbon dioxide is absorbed from the mixture by the action, firstly, of an aqueous ammonia solution (e.g. above 70% by weight) and, secondly, of an ammonia-containing solution of ammonium carbonate, a solution of ammonium carbamate thus being obtained, together with a gaseous stream of nitrogen and hydrogen. The carbamate solution is passed to a urea reactor to obtain a urea solution containing unconverted carbamate and excess ammonia. The carbamate is decomposed and the evolved ammonia is recycled to the urea reactor along with carbon dioxide. The urea solution, now containing a reduced amount of carbamate (e.g. 50% of its original content), is passed to an adiabatic stripper in which the stripping gas used comprises hydrogen and nitrogen obtained from the CO2-absorption stage. Decomposition products together with water are removed from the adiabatic stripper, and are condensed in the presence of ammoniacal ammonium carbonate and the condensate so obtained is passed to the CO2-absorption step. <IMAGE> |
| priorityDate | 1978-04-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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