http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-746904-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C323-00 |
| filingDate | 1953-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-746904-A |
| titleOfInvention | Manufacture of bis-(-a-hydroxyalkyl-)polysulphides |
| abstract | A process for preparing a bis-(b -hydroxyalkyl-) polysulphide comprises (a) heating in an aqueous medium a 1,2-alkylene oxide with an alkali metal- or alkaline earth metal polysulphide in the presence of sufficient sulphur to convert the base liberated to thiosulphate and to bring about the desired degree of sulphurization; or (b) introducing a 1,2-alkylene oxide into an aqueous mixture of an alkali metal- or alkaline earth metal polysulphide and sufficient sulphur to convert the base liberated to thiosulphate and to bring about the desired degree of sulphurization; or (c) forming an aqueous mixture of sulphur and an alkali metal- or alkaline earth metalhydroxide or monosulphide and introducing a 1,2-alkylene oxide, there being initially sufficient sulphur to convert the base liberated to thiosulphate and to bring about the desired degree of sulphurization. A wetting agent may be employed to facilitate the solution of the sulphur in the aqueous medium, e.g. an alkyl or aralkyl sulphonate or other surface-active substance indifferent to the reactants. In examples: bis-(hydroxyethyl-) polysulphide, which may be reduced, e.g. with sodium amalgam to hydroxyethyl-mercaptan, is obtained by heating a mixture of sodium sulphide, sulphur, water and dibutyl-naphthalene sulphate and, when the sulphur has dissolved with the formation of sodium polysulphide, cooling and adding ethylene oxide. Specification 733,947 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2517201-A1 |
| priorityDate | 1952-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.