http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-735229-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2dbb2d7ecbd600cf89fbdd230f4a466c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C409-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C407-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-53 |
| filingDate | 1952-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1955-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-735229-A |
| titleOfInvention | Improvements in the production of phenols and carbonyl compounds |
| abstract | In a process for the production of phenols and carbonyl compounds a hydroperoxide of an alkyl aromatic hydrocarbon of which at least one alkyl group contains a secondary or tertiary carbon atom and perchloric acid are brought into contact at elevated temperature in the presence of a quantity of the phenol to be formed in the reaction, the phenol being introduced before the reaction has commenced. The hydroperoxide may be previously admixed with the phenol before being reacted with the perchloric acid or preferably the perchloric acid and hydroperoxide are added simultaneously to a hot mass of the liquid phenol (which may contain up to an equimolar amount of the carbonyl compound produced in the reaction). The perchloric acid used may be e.g. 0.05 per cent up to about 1 per cent by weight of hydroperoxide and the reaction medium is homogeneous. Suitable hydroperoxides are those of cumene and its homologues, e.g. p-cymene, which yields p-cresol and acetone, isobutylbenzene which gives phenol and methyl ethyl ketone, and ethylbenzene which gives phenol and acetaldehyde. A crude hydroperoxide, e.g. cumene hydroperoxide containing 5 per cent each of cumene and water or 10 per cent cumene, may be used. Reaction temperatures below 65 DEG C. are preferred. The process may be effected continuously by adding hydroperoxide and perchloric acid to the heated phenol and simultaneously removing reaction products. In examples: (1) phenol and acetone are produced continuously by passing perchloric acid and cumene peroxide into phenol and acetone at 40 DEG to 50 DEG C.; (2) cumene hydroperoxide containing water, cumene, phenyl dimethyl carbinol and acetophenone is used in a process as in (1); (3) the decomposition of cumene is effected under partial vacuum, the acetone produced being distilled off continuously. Specification 721,700 is referred to. |
| priorityDate | 1951-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.