http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-616844-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f98715a64276bebda50500dfb6480450 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2521-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2521-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2521-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2523-28 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-207 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C1-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C1-207 |
| filingDate | 1946-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1949-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-616844-A |
| titleOfInvention | Improvements in the production of styrene and styrene compounds |
| abstract | Styrene is prepared by reacting acetophenone with a primary or secondary alcohol containing two or more carbon atoms in the molecule in the vapour phase in the presence of a dehydrating-dehydrogenation catalyst at 200-500 DEG C., preferably 300-400 DEG C. By using mono-, di-or tri-chlorine or mono- or di-methyl nuclearly substituted acetophenones the correspondingly substituted styrene is obtained. It is preferred to use a threeto nine-fold molar excess of alcohol which is converted to the correponding ketone and alcohols specified are ethanol, isopropanol, primary or secondary butanols, pentanols or hexanols. Catalysts instanced are silica-gel, alumina, titania, zirconia, molybdenum oxide, tantalum oxide and magnesium silicate. The acetophenone may be obtained by oxidizing ethyl-benzene and so include a considerable proportion of phenyl - methylcarbinol. In examples, styrene is prepared from acetophenone and ethanol using (1) magnesium silicate, (2) zirconium oxide, (3) molybdenum oxide, (4) tantalum oxide, (9) silica gel and (8) from oxidized ethyl benzene, ethanol and silica gel; mixed o- and p-monochlorostyrene is prepared from mixed o- and p-chlorophenyl methyl ketone and ethanol with (5) tantalum oxide, (6) alumina gel, (7) titanium oxide, (10) silica gel and (11) from chlorophenyl methyl ketone, isopropyl alcohol and silica gel; and (12) 2,5-dichlorostyrene is prepared from 2,5-dichlorophenyl methyl ketone, ethanol and silica gel and isomeric dichlorostyrenes in (13) from oxidized ethyldichlorobenzenes, ethanol and silica gel. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6156948-A |
| priorityDate | 1946-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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