| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_35c163b846f1e43382aeed8dd7bad2a8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C57-04 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-252
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C57-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-06 |
| filingDate |
2016-09-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edf47ac78dd0249ae275521a82c352ec
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_261708fb492e78aa9dc2ad0058465fee |
| publicationDate |
2022-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
BR-112018004525-B1 |
| titleOfInvention |
Improved process for recovering and producing polymer grade (meth)acrylic acid |
| abstract |
improved process for producing polymer grade (meth)acrylic acid. The present invention relates to a process for recovering polymer-grade (meth)acrylic acid, in the absence of an organic solvent, from a gaseous reaction mixture comprising (meth)acrylic acid obtained by gas-phase oxidation of a precursor of (meth)acrylic acid, said process carried out in an installation comprising at least one dehydration column and a finishing column is characterized by the presence of at least one chemical treatment agent intended to reduce the content of residual aldehydes. the (meth)acrylic acid obtained according to the invention meets the criteria of high quality, which allows its use in the manufacture of acrylic polymers, especially in the field of superabsorbents. this grade is also known as glacial acrylic acid aag. |
| priorityDate |
2015-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |