http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-720129-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8b919a09598a02c07e8429b1441b76e1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-25 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-25 |
| filingDate | 1952-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1954-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-720129-A |
| titleOfInvention | Dehydrochlorination of polychlorocyclohexanes |
| abstract | Polychlorocyclohexanes such as benzene hexachloride are dehydrochlorinated by contacting at a temperature of at least 180 DEG C. with a catalytic amount of a sulphonic acid. Preferably the polychlorocyclohexane is contacted at 180-350 DEG C., more preferably at 220-350 DEG C. with 0.01 to 10 per cent of the catalyst. Suitably the polychlorocyclohexane is contacted with not more than 2 per cent of a catalyst such as o- or p-toluenesulphonic acid, benzenesulphonic acid, naphthalene 1 or 2 sulphonic acid, naphthalene 1 : 4-disulphonic acid, toluene-o -sulphonic acid, taurine, 3-aminopropane - 1 - sulphonic acid, decanesulphonic acid, isethionic acid and ethers thereof, p sulphoacetic acid, ethane-1 : 2-disulphonic acid, anthraquinone-1-sulphonic acid, m-benzenedisulphonic acid, ethylbenzene-p-sulphonic acid, 2-chlorotoluene-5-sulphonic acid and the mahogany acids. Dehydrochlorination of benzene hexachloride according to the invention produces 1 : 2 : 4- and 1 : 2 : 3-trichlorobenzene containing enhanced proportions of the 1 : 2 : 4-isomer, together with 2 : 3 : 4 : 5 : 6-pentachlorocyclohexene-1. Dehydrochlorination of monochlorobenzene hexachloride and dichlorobenzene hexachloride produces tetrachlorobenzene and pentachlorobenzene respectively. An example of the dehydrochlorination of benzene hexachloride using p-toluene sulphonic acid as a catalyst is given. |
| priorityDate | 1951-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.