http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2034533-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C5-31 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-358 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C5-31 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-358 |
| filingDate | 1970-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2034533-A1 |
| titleOfInvention | 1-methyl-3-phenylindanes by cyclisation of 1,3-diphenylbutene-(1)-in - pressence of silicic acid cpds and/or phosphoric acid inter |
| abstract | of general formula (II): where R1, R2 and R3 are same or different alkyl or H; R3 may also be halogen; are cyclised at min 215 degrees C in the presence of a solid catalyst contng. one or more silicic acid cpds. and/or phosphoric acid to give-methyl-3-phenylindanes of gen. formula Cpds. (II) are present as by-products in the dimerisation of styrene where (I) is formed. The process subsequently cyclises (II) to (I) which are used as starting materials for anthraquinone dyes and insecticides. The process gives (I) in high yield and purity. Cps. (II) may be liquid or gaseous or mixtures of (I) and (II) may be used. Preferred silica acid cpds. are silicate such as sodiumaluminium silicate, Fuller's earth, bentonites, kieselgel, kieselguhr etc. Phosphoric acids used may be meta-, pyro- or pref. ortho acid pref. used on silicate carriers or on bauxite, magnesite etc. The catalyst contain pref. 30-80% phosphoric acid and have a particle size of 1-15 mm. It is used at 50-200% of (II). Reaction at 215-300 degrees C, pref. 220-250 degrees C. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2256702-A1 |
| priorityDate | 1970-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.