| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b5bb9fe83891e9132cccb8642a0e6c87
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-783
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C57-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-07
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42 |
| filingDate |
1988-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1993-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_666740b0eb91d3bed19b24283fde61ff
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_351fbc20b98595c13a76e1300e3597db
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_15b271fd08814284b0645b84c7f025a0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b210b46eefbb7c02b736897635ec95e5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b98137cc874e953e2d6b3f3e0df0c61
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7dfb37a561bb8efe4b92caa47174c31f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae683e19368dac30ba4c2b81ef4690c5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_19105766bf1cdc65fcbc34eeaea3beea |
| publicationDate |
1993-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-1316545-C |
| titleOfInvention |
Quenching process of reaction product gas containing methacrylic acid and treatment method of quenched liquid |
| abstract |
ABSTRACT In order to recover methacrolein and/or methacrylic acid by quenching a reaction product gas obtained by catalytic oxidation of isobutylene or the like, the reaction product gas is charged into a quench column through a double-wall pipe and is then brought into contact with a condensate as a cooling medium. Deposition of terephthalic acid and the like inside the column is prevented by controlling the temperature of a bottom in the quench column and that of an overhead gas of a quench column unit. An aromatic carboxylic acid, aromatic aldehyde, metal powder is added to an aqueous solution of methacrylic acid, which contains tere-phthalic acid and the like, so that the terephthalic acid and the like are caused to precipitate for their removal. |
| priorityDate |
1987-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |