| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d1a9030daaed3d1d15f0fb83dcd5a57c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b125e90a7a4dac6558467de77518d6b |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-1854 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-18 |
| filingDate |
1984-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_904218725d2a27ba8f6a65543b9bae55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e077e82ff35e3264703f25651fba7ea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22b2ea91854fcb1b06a4cfc2d4f0e2a4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8cafdad41d330eaa781ce31bd51aa1ed
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_756abc9e53283644d73d0947290242c8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5d0b6f105d2f48b99b16db07f8415d2f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb85b6609b3651f572f2b4a3ce6adb8a |
| publicationDate |
1984-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-3405582-A1 |
| titleOfInvention |
METHOD FOR PRODUCING N-SUBSTITUTED UREAS |
| abstract |
The invention relates to a process for the preparation of N-substituted ureas by reacting carbon oxide, water and nitro compounds, or by reacting carbon oxide, nitro compounds and amines, in the presence of organic and/or inorganic selenium compounds with catalytically active selenium and in the presence of water and/or bases, in which process the catalytically active form of the selenium is prepared from selenium-containing compounds by physical, chemical or photochemical means before or during the carbonylation reaction. The selenium compounds used as catalysts for this process are stable under normal conditions and can be converted into the catalytically active form by a suitable activation process. The use of the selenium compounds which have previously been employed as catalysts of the carbonylation reaction and which cause handling problems can therefore be avoided according to the invention. The N-substituted ureas prepared by the above process are mainly used in the crop protection chemicals industry. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0319111-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5306842-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0310907-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0319111-A2 |
| priorityDate |
1983-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |