http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-167157-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_966a6c1f382ec9bcb5e3839dfd73e5b8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-72 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-72 |
| filingDate | 1921-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1922-08-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-167157-A |
| titleOfInvention | Process for the manufacture of allyl arsinic acid |
| abstract | Allylarsinic acid is obtained by interaction of an allyl halide and an alkali arsenite in strongly alkaline aqueous solution; the properties of the free acid and its calcium, magnesium, mono- and di-sodium, silver, zinc, lead, copper, cobalt, and iron salts are mentioned; the salts are intended for therapeutic use. In examples, allyl chloride is heated with caustic soda solution and arsenious oxide, the aqueous layer neutralized, excess arsenite removed by calcium chloride, and the calcium salt of allylarsinic acid precipitated by boiling with more calcium chloride and the acid liberated by oxalic or sulphuric acid; or the neutralized aqueous layer is evaporated and the acid extracted with absolute alcohol: allyl bromide is mixed with caustic soda and sodium arsenite, the excess of allyl bromide then distilled off, the residue acidified, and the calcium salt precipitated. The Specification as open to inspection under Sect. 91 (3) (a) describes also the use of allyl iodide; this subject-matter does not appear in the Specification as accepted.ALSO:Allylarsinic acid is obtained by interaction of an allyl halide and an alkali arsenite in strongly alkaline aqueous solution; the properties of the free acid and its calcium, magnesium, mono- and di-sodium, silver, zinc, lead, copper, cobalt, and iron salts are mentioned; the salts are intended for therapeutic use. In examples, allyl chloride is heated with caustic soda solution and arsenious oxide, the aqueous layer neutralized, excess arsenite removed by calcium chloride, and the calcium salt of allylarsinic acid precipitated by boiling with more calcium chloride and the acid liberated by oxalic or sulphuric acid; or the neutralized aqueous layer is evaporated and the acid extracted with absolute alcohol: allyl bromide is mixed with caustic soda and sodium arsenite, the excess of allyl bromide then distilled off, the residue acidified, and the calcium salt precipitated. The Specification as open to inspection under Sect. 91 (3) (a) describes also the use of allyl iodide. This subject-matter does not appear in the Specification as accepted. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2442372-A |
| priorityDate | 1920-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.