http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-575530-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/C07C17-25 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-25 |
| filingDate | 1944-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1946-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-575530-A |
| titleOfInvention | Improvements in or relating to the production of trichlorethylene |
| abstract | Trichlorethylene is prepared by the pyrolysis of tetrachlorethane, made by the chlorination of acetylene and containing 5 per cent impurities, at a temperature in the range 400-500 DEG C. Perchlorethyele and dichlorethylene are also formed. The hydrogen chloride evolved is adsorbed in water and the liquid products are water washed and separated by fractionation. The apparatus for pyrolysis is made of a corrosion resisting, non-catalytic metal such as iron, steel or nickel, or can be made of carbon, porcelain or similar materials. Cracking is carried out in unpacked coils of tube of small diameter, or in pipes of larger diameter packed with Rashig rings, porcelain or other non-catalytic materials. In the examples: (1) crude tetrachlorethane from the acetylene chlorinator is vaporized at 170-190 DEG C., preheated to 350-370 DEG C. and passed through the reaction chamber maintained at 460-470 DEG C. The liquid product, chiefly trichlorethylene, is condensed and the hydrogen chloride absorbed in water; (2) crude tetrachlorethane is vaporized at 200 DEG C. and passed through a nickel coil maintained at 460 DEG C. The liquid product is chiefly trichlorethylene, but contains some perchlorethylene and tetrachlorethane. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2859254-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1090651-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2682512-A |
| priorityDate | 1943-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.