http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-923520-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_70ec63d39d6704bacc5c7068c93ded43 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2207-026 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2207-023 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-16 |
| filingDate | 1960-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2002c3a7e9ce358f02e9fa01ca9ea90d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_12e0b6ade4a38cb66e94e8bf75ae142a |
| publicationDate | 1963-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-923520-A |
| titleOfInvention | A process for the preparation of alkylated phenolic compounds |
| abstract | One or more alkylated phenols are prepared by a process which comprises (a) condensing at a temperature below 100 DEG C. a 2,4- or 2,6-dialkylphenol with formaldehyde in the presence of a basic catalyst and a monohydric secondary or tertiary alkanol, there being at least 0.1 mol of alkanol per mol of dialkylphenol, so as to form a 3,5-dialkyl-4-or-6-hydroxybenzyl alcohol and (b) condensing in the presence of a basic catalyst and a monohydric secondary or tertiary alkanol the 3,5-dialkyl-4-or-6-hydroxybenzyl alcohol with respectively a 2,6- or 2,4-dialkylphenol to yield respectively a bis(3,5-dialkyl-4-or-6-hydroxyphenyl) methane. The product of step (a) may also be catalytically hydrogenated at a pressure in excess of 7.8 atmospheres to form a 2,4-dialkyl-6-methylphenol or 2,6-dialkyl-4-methylphenol. The alkylphenols are used as antioxidants. An apparatus for carrying out the processes is described. In an example 2,6-di-tert-butyl-phenol is condensed at 10 degrees with formadehyde in tert.-butyl alcohol containing pottassium hydroxide, the mixture neutralised with carbon dioxide and tert.-butanol is distilled off to give a residue of 3,5-di-tert.-butyl-4-hydroxy alcohol. This substituted benzyl alcohol is either reacted at 77 DEG C. with 2,6-di-tert.-buty-phenol in tert.-butanol containing potassium hydroxide and the mixture cooled to crystallise bis(3,5-di-tert.-butyl-4-hydroxyphenyl) methane or hydrogenated under pressure in isopropanol using a copper chromite catalyst to give 2,6-di-tert.-buty-4-methylphenol. Specifications 806,961, 862,261 889,321 and 893,896 are referred to. |
| priorityDate | 1959-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.