http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1296721-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2527-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2531-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2527-167 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2527-053 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-2055 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-269 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-205 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-84 |
| filingDate | 1970-08-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1296721-A |
| abstract | 1296721 Dehydrocoupling benzene and substituted benzenes ASAHI KASEI KOGYO KK 11 Aug 1970 [11 Aug 1969 29 Sept 1969] 38594/70 Heading C5E [Also in Divisions B1 and C2] Diphenyl compounds of the formula where X is H, lower alkyl (up to hexyl), lower alkoxy (up to propoxy), Cl or NO 2 and Y is H or methyl are made by heating a compound of the formula in the presence of an oxygen-containing gas (partial pressure of oxygen at least 5 kg/cm<SP>2</SP>), a catalytic amount of palladium or a compound of palladium and a co-catalytic amount of sulphuric acid. Materials treated in the examples include: benzene, meta-xylene (yielding 2,4,2<SP>1</SP>,4<SP>1</SP>-tetramethyldiphenyl), paraxylene (yielding 2,5,2<SP>1</SP>,5<SP>1</SP>-tetramethyldiphenyl), toluene (yielding both 2,2<SP>1</SP>- and 4,4<SP>1</SP>- dimethyldiphenyl), ortho-xylene (yielding 3,4,3<SP>1</SP>,4<SP>1</SP>-tetramethyldiphenyl), and cumene (yielding 4,4<SP>1</SP>-diisopropyldiphenyl). Reference is also made to the use of ethylbenzene. The oxygen may be pure or diluted with an inert gas, e.g. nitrogen or CO 2 . The reaction temperature is 30-300‹ C., preferably 50-200‹ C. Catalysts may be made by: (Example 1) adding silica gel to a solution of palladium chloride in dilute hydrochloric acid, evaporating to dryness, reducing by adding a solution of hydrazine hydrate, washing, drying, dipping in a solution of potassium acetate, and again drying; (Example 2) adding silica gel to an aqueous acetic acid solution of palladium acetate and potassium acetate and evaporating to dryness; and similar techniques using as supports: alumina, activated carbon or silica-alumina, as palladium compounds: the sulphate, propionate, nitrate and phosphate, and as co-catalysts: lithium acetate, potassium nitrate, NaH 2 PO 4 , caesium acetate, rubidium sulphate, lithium nitrate, sodium acetate and potassium acetate (together), KH 2 PO 4 , caesium sulphate, potassium sulphate, rubidium acetate or none. There may also be added to the sulphuric acid a lower fatty acid such as acetic, propionic, butyric valeric or caproic acid, or their salts. |
| priorityDate | 1969-08-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 96.