| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7f9af914ed2fb00cd4f1b8b1a28964e4 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-44 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-075
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-44 |
| filingDate |
2004-05-07^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2008-01-15^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_934c4992634c7d6706de0301f206edb7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e769949d28de33a91a8bf41df8f16238
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a241c0b4ebeee8d4fd87a5c2a7b5a17 |
| publicationDate |
2008-01-15^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7319167-B2 |
| titleOfInvention |
Method for distilling (meth)acrylic acid and/or the ester thereof |
| abstract |
A method for distilling (meth)acrylic acid and/or the ester thereof by withdrawing vapor generated in a distillation column by distillation from the top of the column, condensing the vapor to give a condensate, and circulating part of the condensate as reflux liquid into the distillation column from the top thereof, comprising the step of adding a polymerization inhibitor to said condensate and said reflux liquid. This method enables maintaining the purity and quality of (meth)acrylic acid and/or the ester thereof at a certain level or higher, suppressing generation of polymers in the rectification column and suppressing polymerization of the condensate obtained by distillation in the incident facilities of the column such as condenser, condensate tank, and the like. In addition, the method enables reduction in the amount of polymerization inhibitor used while suppressing polymerization in the intermediate distillation columns (except the final rectification column). |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11447439-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007193873-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020020697-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102010042216-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021191042-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008128263-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012045738-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9212122-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110935188-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9447201-B2 |
| priorityDate |
2003-05-09^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |