http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-810263-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04650c4315071ee8af7d26e3441a53b1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J25-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J25-04 |
| filingDate | 1956-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1959-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-810263-A |
| titleOfInvention | Treatment of raney metal suspensions |
| abstract | Raney metal catalysts are recovered by treating an aqueous suspension of the finelydivided metal with a "polyelectrolyte" which causes the metal particles to agglomerate. A polyelectrolyte is an organic polymer which in the presence of water forms organic ions. The polymers have a substantially linear C chain, are of molecular weight at least 10,000, and are hydrophyllic due to the presence of side chains containing hydroxy, sulphonic, or carboxy groups. Examples are described in U.S.A. Specification 2,625,529 and include compounds made by polymerizing unsaturated carboxylic acids or their derivatives alone or with unsaturated hydrocarbons or their derivatives. Suitable acids are fumaric, crotonic, acrylic or itaconic acid, their salts esters or amides. The copolymer may be ethylene, styrene or vinyl ether. A polymer containing acetyl, or nitrile groups in the side chain may be hydrolysed to introduce COOH or OH groups, or polymers may be treated to introduce a sulphonic acid group. In examples, an aqueous suspension of finely-divided nickel used in the hydrogenation of alcohol or acetone is treated with an aqueous solution containing a very small amount of the calcium salt of a copolymer of vinyl acetate with maleic acid. The nickel settles out in clumps within a few minutes and is readily filtered. The recovered catalyst shows no loss of activity. The process may also be applied to finely-divided suspensions of silver, cobalt, iron or copper. |
| priorityDate | 1956-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.