http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-889764-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_86c830a3398b926c1e2a740bb3bbb10a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C313-04 |
| filingDate | 1958-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-889764-A |
| titleOfInvention | A process for the production of alkyl sulphinic acids and alkyl sulphonic acid compounds |
| abstract | Alkyl sulphinic acids are prepared by adding an aluminium trialkyl to a substantial excess of SO2 over the theoretical 3 moles per mol of trialkyl and treating the resulting aluminium alkyl sulphinate with a strong acid whose aluminium salt is water-soluble. In modifications, the intermediate aluminium alkyl sulphinate is oxidised with an alkali metal permanganate to give the corresponding aluminium alkyl sulphonate, which may be acidified to liberate the free alkyl sulphonic acid, or the aluminium alkyl sulphinate is suspended in dilute hydrochloric acid, the liberated sulphinic acid is oxidised with chlorine and the resulting alkyl sulphochloride is decomposed with boiling water yielding the alkyl sulphonic acid. The SO2 may be used in liquid form at -60 DEG C. or at higher temperatures under pressure, or in solution in an organic solvent. In a typical example (1) a toluene solution of aluminium tri-n-decyl is added dropwise to a toluene solution of SO2 at -45 DEG C., thereafter excess SO2 is evaporated off and the residual aluminium n-decyl sulphinate is treated with dilute HCl and the resulting decyl sulphinic acid is purified via its Na salt; butyl, octyl and cetyl sulphinic acids are similarly prepared. In example (4) aluminium tri-octyl is reacted with SO2 in toluene in an autoclave at 20 DEG C.-30 DEG C. and the product is worked up as in (1). The aluminium alkyl sulphinates obtained are also titrated with KMnO4, yielding the corresponding sulphonates, and aluminium cetyl sulphinate, obtained as in (1), is converted to 1-hexadecane sulphonic acid via the sulphochloride. The alkyl sulphinic acids are polymerisation initiators. Reference has been directed by the Comptroller to Specification 819,181. |
| priorityDate | 1957-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.