http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1524341-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a22da5b7dd6ed60a21538e5edb23e051 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25B3-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-055 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-235 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25B3-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-055 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-235 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-66 |
| filingDate | 1977-01-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1524341-A |
| titleOfInvention | Electrolytic coupling process |
| abstract | 1524341 Production of bis-(hydroxyaryl) alkanes MONSANTO CO 4 Jan 1977 [5 Jan 1976] 00007/77 Heading C7B [Also in Division C2] A cresol salt substituted with non-interfering, blocking substituents at least at the 2, 4, 6-positions relative to the phenolic oxyanion where at least one of the substituents is the cresolic methyl, eg a 2, 4, 6-trialkylphenol salt or alkali metal or tetraalkylammonium 2, 4, 6-trialkylphenoxide, is electrolytically oxidized at the anode in a liquid electrolysis medium comprising the salt and solvent to produce a methyl-methyl coupled dehydrodimeric cresol ie 1, 2-bis (hydroxyaryl) ethanes, eg 1, 2-bis (3, 5-dialkylhydroxyphenyl) ethane. The medium is preferably anhydrous or may have a small amount of water added, forming a solution, dispersion or emulsion. The solvent may be acetonitrile, propanenitrile, benzonitrile, dimethylformamide, hexamethylphosphoramide or sulpholane. An electrolyte, such as an alkali or alkaline earth metal, amine or quaternary ammonium salt eg perchlorate, tetrafluoroborate, hexafluorophosphate, phosphate, sulphate, sulphonate or tetraphenylboride, may be added. Unreacted cresol may be recycled in a divided cell comprising an anode eg of Pt, PbO 2 , Au or preferably graphite felt, a cathode eg of Pt, Pd, Hg, Pb or C (graphite), and a barrier eg of fritted glass filter, glass cloth, asbestos, porous PVC or ion-exchange membrane. The electrolyte may be ice-cooled. The crude dehydrodimeric cresol produced may be dissolved in solvent eg chloroform or ether and treated eg at 0C with acylating agent, eg acetyl chloride or acetic anhydride in presence of triethylamine. The dehydrodimeric cresol may also be dealkylated eg to form 1, 2-bis(4-hydroxyphenyl) ethane or bisphenol. |
| priorityDate | 1976-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 65.