http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-769383-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bfef54e7e18f717965268e6f73da19af |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2527-173 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-70 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-70 |
| filingDate | 1955-05-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-03-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-769383-A |
| titleOfInvention | Improvements in or relating to manufacture of isopropyl benzene |
| abstract | Mono-isopropyl benzene is obtained by passing benzene and propylene in the molal range of 3 : 1 to 8 : 1 over a solid phosphoric acid alkylation catalyst at 204-206 DEG C. and a pressure of 25-60 atmospheres in the presence of a quantity of water within the limits of <FORM:0769383/IV(b)/1> when M is the mol. percentage of water, and t = temperature in degrees Centigrade of the steam entering the catalyst mass and P is the pressure in atmospheres. The water may be added as such to dry reactants, in the form of a controlled degree of moisture in the reactants themselves, or in the form of compounds which produce water during the reaction such as propyl alcohol. The benzene may be obtained from the distillation of coal, the dehydrogenation of naphthenic hydrocarbon fractions containing cyclohexane, and the dehydrogenation and cyclization of aliphatic hydrocarbons containing 6 carbon atoms per molecule in straight-chain arrangement, such as normal hexane and the straight-chain hexene. The catalyst may be made by mixing ortho-, pyro- or tetra-phosphoric acid with diatomaceous earth or clay and calcining at a temperature below 500 DEG C. and then grinding and sizing. Preferably the process is effected in 2 or more stages and the increase in temperature from inlet to outlet should not exceed 25 DEG C. preferably it should be less than 15 DEG C. A quenching liquid such as propane may be added between successive catalyst beds in order to regulate the rise in temperature. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3201486-A |
| priorityDate | 1955-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.