http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-570470-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-278 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-278 |
| filingDate | 1943-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1945-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-570470-A |
| titleOfInvention | Process for the production of halofluoroalkanes |
| abstract | Halofluoroalkanes are prepared by reacting in the presence of a Friedel-Crafts catalyst, a halogenated methane containing at least three halogen atoms of which at least one is a fluorine atom and the remaining halogen atoms may be any halogen or halogens, with a halogenated ethylenic compound having at least one halogen atom other than fluorine attached to a doubly-linked carbon atom. Specified halogenated methanes are difluorochloro methane, difluorodichloro methane, and fluoroform. Ethylenic compounds of the general formula RR1C = CR2X may be used, wherein R, R1 and R2 are hydrogen, halogen, alkyl or halogenated alkyl and X is halogen, the halogen in each case being any halogen other than fluorine, although chlorine is preferred. It is preferred to use ethylenic compounds carrying chlorine atoms on the double-bonded carbon atoms. The reaction is preferably carried out at ordinary temperatures, say temperatures up to 30 DEG C. Aluminium chloride is the preferred catalyst, but other Friedel-Crafts catalysts may be used such as boron trifluoride, zinc chloride and ferric chloride. The condensation products may be isolated by decomposing the catalyst with ice or cold water and distilling at ordinary or elevated pressure. The products obtained are useful as dielectric fluids and cooling liquids. In an example, dichloromonofluoro methane is reacted with tetrachloroethylene to give monofluorohexachloropropane. Other ethylenic compounds specified are trichlorethylene, sym.-dichlorethylene, vinyl chloride, 1 : 2 : 3-trichlorpropene, 1 : 2-dichlor-1-hexene and sym.-dibromoethylene. In a statement of prior art, reference is made to the preparation of chlorinated propanes through the condensation of such compounds as chloroform or carbon tetrachloride with trichlorethylene or tetrachlorethylene in the presence of aluminium chloride according to Prins' method and their subsequent fluorination with dichlorantimony trifluoride to give higher fluorinated propanes bearing a number of chlorine atoms. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9108183-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5220084-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5434321-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5227547-A |
| priorityDate | 1942-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 58.