http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-630859-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7d85dcd158e228144667bee0439baa19 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_58fa76a0198d9d8ec59f71fb5ddba5a9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D295-023 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D295-023 |
| filingDate | 1946-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1949-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-630859-A |
| titleOfInvention | Improvements in and relating to the hydrogenation of cyclic organic nitrogen compounds |
| abstract | Saturated cyclic organic nitrogen compounds are obtained by the continuous liquid phase hydrogenation of compounds containing carbon, hydrogen and nitrogen only (see Group IV (b)), in the presence of a foraminate nickel or cobalt hydrogenation catalyst. The catalysts are of the alloy type comprising the desired catalytically active metal or metals together with one or more metals more soluble in acid or alkali or other extracting liquid than the catalytically active metal or metals and are preferably crushed to a particle size grading between 1/8 inch and 1/4 inch meshes. Cobalt catalysts, e.g. cobalt/aluminium are preferred. An alkali such as sodium or potassium carbonate or bicarbonate may be present in the catalyst as a promoter. Specifications 570,843, 611,987, 623,595, 628,405, 628,407, and 630,161 are referred to.ALSO:Saturated cyclic organic nitrogen compounds are produced by hydrogenating compounds containing carbon, hydrogen and nitrogen only and at least one reducible cyclic group continuously in the liquid phase in the presence of a foraminate nickel or cobalt alloy catalyst. The nitrogen atom may be in the ring which preferably contains at least five members or in an amino or nitrile group external to the ring, e.g. amino-aromatic, amino-heterocyclic and amino-alicyclic compounds and especially primary amines. Pressures of 200-400 atmospheres, temperatures of 135-170 DEG C., especially 140-150 DEG C., and cobalt catalysts, particularly cobalt/aluminium are preferred. Alkalies such as sodium or potassium carbonate or bicarbonate may be present in the catalyst or the reaction medium and the reaction mixture may be charged with ammonia. Inert solvents such as tetrahydrofuran, dioxan and tetrahydropyran may be employed. It is stated that cyclohexylamine, bis-para-amino-cyclohexyl - methane, dimethyl - cyclohexylamine, piperidine and hexahydrobenzylamine are obtained from aniline, bis - para - aminophenyl-methane, dimethylaniline, pyridine and benzonitrile respectively. In an example aniline is hydrogenated in the presence of a cobalt/aluminium catalyst to yield cyclohexylamine with some dicyclohexylamine. Specifications 570,843, 611,987, 623,595, 628,405, 628,407, [all in Group III], and 630,161 are referred to. |
| priorityDate | 1946-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.