| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d5d04736b0b882a4f5a1e0e0e4cd8cbb |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-395 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-755
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-395
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C19-08 |
| filingDate |
1997-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_90f7a7cef8f6fb88b4df641807bcfda4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c9620f850f477e03f0afd24dcd7aa80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a031ba5e1f30dce3b8ff4d85002b7808
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67771df92e145d64cc32e8a9f8d784d8 |
| publicationDate |
1998-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H10306046-A |
| titleOfInvention |
Purification method of trifluoromethane |
| abstract |
PROBLEM TO BE SOLVED: To purify trifluoromethane (crude HFC-23) containing a compound having chlorine and bromine as impurities and produce a low-temperature refrigerant or tetrafluoromethane containing almost no such impurities. To provide an industrially easy and economical purification method for obtaining high-purity trifluoromethane that can be used as a raw material for products. SOLUTION: The above-mentioned crude trifluoromethane containing impurities is reacted with hydrogen fluoride at an elevated temperature in the presence of a fluorination catalyst in a gas phase to convert chlorine and bromine into hydrogen chloride and hydrogen bromide. And then remove the acid containing hydrogen chloride and hydrogen bromide, and dehydrate by contacting with a dehydrating agent. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4552246-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113816827-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012133043-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104803823-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113735683-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113735683-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113816827-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001181220-A |
| priorityDate |
1997-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |