http://rdf.ncbi.nlm.nih.gov/pubchem/patent/IT-972688-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_433cd5401525a20ed61e9709375c53a3 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10G2300-1092 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P30-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S585-95 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10G2400-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C4-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10G47-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10G69-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C4-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10G47-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10G47-00 |
| filingDate | 1972-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1974-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1974-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | IT-972688-B |
| titleOfInvention | CRACKING PROCESS UNDER HYDROGEN PRESSURE FOR THE PRODUCTION OF OLEFINS |
| abstract | 1419260 Hydrocarbons; hydrocracking PIERREFITTE-AUBY 19 Dec 1972 [21 Dec 1971 24 Oct 1972] 58514/72 Heading C5E A hydrocarbon feed is cracked to olefines in the presence of hydrogen and in the absence of bromine at a pressure between 10 and 70 bars, a molar concentration of hydrogen not less than 20%, a reactor outlet temperature between 625‹ and 1000‹ C., and a residence time between 0À01 and 0À5 second. The feed may be a C 3 fraction, a C 4 fraction or a steam-cracked gasoline but is preferably low in aromatics. The hydrogen need not be pure, so long as the contaminants are inert or do not cause undesirable reactions. Steam may also be present as diluent. As shown, the feed is compressed at 1, mixed at 11 with hydrogen and cracked at 2. The products are separated at 3 into gas 4 and liquid 5, which are fractionated separately at 6 and 7. Methane, ethane, ethylene, propane and propylene are recovered as products from 6, or the ethane and propane fractions may go to an additional steam-cracker 8, the products from which are returned to the fractionator 6. Hydrogen from fractionator 6 is recycled. Heavy fractions from 6 are transferred to fractionator 7, whereas light fractions of the liquid 5 are transferred in the opposite direction. Fractions from the fractionator 7 may be taken off as products, e.g. for gasoline, used as quench at 15, recycled by line 13 or recracked at 14. Small proportions of sulphur in the feed as organic compounds or as H 2 S reduce coke formation. A build-up of aromatics should be avoided by taking off a suitable fraction, similar to coke-oven benzol at 7. |
| priorityDate | 1971-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.