http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-948057-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c9029be57d6949b7bcb263d305f7733c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C57-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-60 |
| filingDate | 1960-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1964-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-948057-A |
| titleOfInvention | A process for the synthesis of maleic anhydride |
| abstract | Maleic anhydride is made by introducing a mixture of benzene vapour and air into a primary reaction vessel containing a conventional catalyst, controlling by temperature the normal reaction for the production of maleic anhydride in said vessel so that the yield of maleic anhydride is an amount corresponding to 32 to 38% of the initial amount of benzene measured by the ratio of the observed value to the theoretical value of carbon dioxide evolved and after recovering maleic anhydride causing the gas containing unreacted benzene, from which maleic anhydride produced has been removed, to react again in a secondary reaction vessel at a higher temperature than in the primary reaction vessel so that maleic anhydride in an amount corresponding to 32 to 38% of the initial amount of benzene may be produced. The maleic anhydride may be recovered from outlet gas in both steps by washing with a solvent such as water, dibutyl phthalate, dimethyl phthalate, tricresyl phosphate, diethyl isophthalate or the dimethyl ester of endomethylene tetrahydrophthalic acid. Examples use a catalyst prepared from ammonium vanadate, ammonium molybdate and oxalic acid and applied to pumice stone. The temperatures used in primary and secondary steps in the examples are (1) 350 DEG and 390 DEG C., (2) 390 DEG C. and 410 DEG C., (3) 390 DEG C. and 430 DEG C. |
| priorityDate | 1959-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.