http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-798644-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e5302e08e56037ff7bc5c9b6fcc29f9 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B3-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B32-215 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B32-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B41-53 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B41-53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B31-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B31-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05B3-60 |
| filingDate | 1955-08-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b95de25802cf6fb9b66d73fa4857b9f9 |
| publicationDate | 1958-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-798644-A |
| titleOfInvention | Improvements in or relating to the purification of carbon or graphite articles |
| abstract | Carbon or graphite is purified by treatment at elevated temperature with a gaseous fluorinating agent, e.g. fluorine, hydrogen fluoride, or a fluorinated hydrocarbon which dissociates to produce fluorine or hydrogen fluoride at the temperature of treatment. Organic fluorides specified are tetrafluoro-, dichloro-, monofluoro-, dichlorodifluoro-, monochlorodifluoro-, and trichloromonofluoro-methane and mono-, di, tri- and tetrafluoro ethylene. The temperature of treatment may be 1860-2600 DEG C., preferably 2200-2600 DEG C. The material may be pretreated with a gaseous or vaporous chlorinating agent at a progressively increasing temperature initially less than 1860 DEG C., preferably increasing to a temperature in the range 1860-1950 DEG C. Chlorinating agents specified are chlorine, carbon tetrachloride, and hexachloropropylene. Nitrogen, ammonia, or helium may be used as carrier or diluent for the chlorinating and/or fluorinating agent and to sweep out the chlorinating and fluorinating agents after treatment. Petroleum coke powder bonded with coal tar pitch, and graphite prepared therefrom, may be treated. A fluorinating apparatus (Fig. 1, not shown), comprises an electric furnace comprising graphite electrodes separated by a bed of pure petroleum coke in which are placed the graphite articles to be treated. Porous tubes for introduction of the fluorinating agent are mounted below the articles. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113603085-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7517516-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012136192-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012136192-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111186834-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1623894-B |
| priorityDate | 1955-08-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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