http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-497353-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-29 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-29 |
| filingDate | 1937-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-497353-A |
| titleOfInvention | Manufacture of substituted benzenecarboxylic acids |
| abstract | Benzene carboxylic acids and salts thereof are manufactured by oxidizing with a hypohalogenite solution an acetophenone or an o -halogen acetophenone which is substituted in the nucleus by one or more aliphatic or cycloaliphatic hydrocarbon radicals, of which at least one has at least twelve carbon atoms. The products may be used instead of or in addition to soaps. The starting materials are obtained by condensing acetic acid halide or halogen-acetic acid halide with a suitably substituted benzene hydrocarbon which may be obtained by catalytic reduction of ketones obtained from a benzene hydrocarbon and a higher fatty acid halide, or by condensing a benzene hydrocarbon with a higher aliphatic or cycloaliphatic olefine, an alkyl halide, or the product obtained by chlorinating a mixture containing hydroaromatic hydrocarbons and obtained by hydrogenation of coal. A crude acetophenone or o -halogen acetophenone may be employed with an excess of hypohalogenite solution. The carboxylic acids are precipitated by addition of acid and may be converted into salts. In examples: (1) p-n-dodecylacetophenone (obtained by condensing acetyl chloride with n-dodecylbenzene in presence of aluminium chloride) is oxidized with potassium hypochlorite solution. Sodium, calcium, barium and heavy metal salts may be made. The n-dodecylbenzene is obtained by catalytic reduction of laurophenone; (2) a crude alkyl o -chloroacetophenone (obtained from chloracetyl chloride and an alkylbenzene of molecular weight about 260, corresponding to an average chain length of 13-14 carbon atoms and obtained by condensation of benzene with the product obtained by chlorinating a mixture containing hydroaromatic compounds obtained in the hydrogenation of lignite) is oxidized with sodium hypochlorite. A mixture of acids or the corresponding salts is obtained; (3) diiso-hexylene is condensed with benzene in presence of boron fluoride-phosphoric acid and the product after distillation is treated with bromacetyl bromide. The resulting condensation product after removal of the more readily volatile portions is oxidized with sodium hypochlorite solution or potassium hypobromite. A mixture of acids is obtained. Their alkali, ammonium, alkaline earth and heavy metal salts may be prepared. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0046194-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1171900-B |
| priorityDate | 1937-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.