http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1500880-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ee1c19da359446fb5c4f0458a57b783d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D309-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-33 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D305-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D309-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33 |
| filingDate | 1976-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1500880-A |
| titleOfInvention | Process for producing perfluorolactone |
| abstract | 1500880 Perfluorolactones ASAHI GLASS CO Ltd 16 Sept 1976 [23 Sept 1975] 38457/76 Heading C2C Perfluorolactones of general formula where n = 2-4, are prepared by reacting with fuming H 2 SO 4 , where X is a halogen atom, -OR or -NR<SP>1</SP>R<SP>2</SP> group in which R, R<SP>1</SP> and R<SP>2</SP> are each H or C 1-10 alkyl. Preferably the acid fluoride is used and reacted with fuming H 2 SO 4 containing 20-60 wt. per cent SO 3 in the presence of a catalyst chosen from mercuric sulphate, cadmium sulphate or zinc sulphate and optionally a catalytic amount of Cl 2 . The reaction is preferably conducted at 60-110‹ C. for 2-10 hours. In the examples perfluoro-γ- butyrolactone is obtained from I(CF 2 ) 3 CO 2 CH 3 , I(CF 2 ) 3 COF and I(CF 2 ) 3 CONHC 2 H 5 . Perfluoro- 8-valerolactone is obtained from I(CF 2 ) 4 COF. |
| priorityDate | 1975-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.