http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H09505566-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C19-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-358 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-206 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C19-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-358 |
| filingDate | 1994-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1997-06-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H09505566-A |
| titleOfInvention | Method for producing high-purity 1,1-dichlorotetrafluoroethane |
| abstract | (57) Abstract: substantially CClF 2 CClF 2 unexpected contain CCl 2 FCCF 3 manufacturing method are disclosed. The process essentially involves contacting a feed mixture of C 2 Cl 3 F 3 with a ratio of CCl 2 FCClF 2 to CCl 3 CF 3 of at least 1: 9 with an isomerization catalyst per million parts of CCl 3 CF 3 Comprising producing an isomerization product in which less than about 50,000 parts by weight of CCl 2 FCClF 2 is present. The isomerization product is contacted with HF in the gas phase in the presence of a fluorination catalyst containing trivalent chromium at a selected high temperature of 400 ° C. or lower, and 10,000 parts by weight per million parts of CCl 2 FCF 3 there are fewer CCl 2 F 2 CClF 2 parts, and CCl 3 CF 3 100 CCl 3 parts by weight of CCl 2 FCClF 2 per million parts are in isomerization product CF 3 100 million parts per CCl 2 FCClF 2 To give a fluorinated product containing more than 2 parts by weight of C 2 Cl 2 F 4 and C 2 Cl 3 F 3 . C 2 Cl 2 F 4 is recovered from the fluorinated product; and C 2 Cl 3 F 3 from the fluorinated product is at least equal to the amount of C 2 Cl 2 F 4 recovered from the fluorinated product, It is then recycled to the isomerization process along with an additional amount of CCl 2 FCClF 2 sufficient to provide the feed mixture ratio of CCl 2 FCClF 2 to CCl 3 CF 3 . |
| priorityDate | 1993-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.