http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1448136-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f6e960aa6ad2ba6401030159343ebe68 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C5-412 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C15-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C5-41 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-26 |
| filingDate | 1973-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1448136-A |
| titleOfInvention | Process for preparing dimethyl naphthalenes |
| abstract | 1448136 Dimethylnaphthalenes MITSUI PETROCHEMICAL INDUSTRIES Ltd 21 Dec 1973 [25 Dec 1972 16 Feb 1973] 59456/73 Heading C5E 1,6-, 2,6- or 2,7-Dimethylnaphthalenes are prepared by heating a compound of the Formula I where R is a straight chain butyl, butenyl or butadienyl group which is substituted by one pendant methyl group and which is attached to the p-tolyl group at a terminal position in the presence of a cyclization-dehydrogenation catalyst comprising an oxide of chromium and/or rhenium. The catalyst may be supported, e.g. on Al 2 O 3 and SiO 2 , and may also contain an alkali metal oxide or alkaline earth metal oxide. The reaction may be carried out in the vapour phase at 200-700 C. Compounds of the Formula (I) may be prepared by the side chain alkylation of p-xylene with butene or butadiene using an alkali metal on a carrier or an organo alkali metal compound as catalyst. Alternatively the starting material may be prepared by intermolecular condensation between a chlorine substituted aromatic compound and a chlorine-substituted aliphatic compound in the presence of K; by a Grignard reaction with subsequent elimination of H 2 O using Al 2 O 3 ; by dehydrogenation of the corresponding p-tolylpentane or by reaction of chloromethyl toluene with an aldehyde or ketone. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0034212-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9702225-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6472576-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5952534-A |
| priorityDate | 1972-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.