| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c85d78c6a4459b5dbbc49c82a4c5c107
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fb78b459e21bb4fd52850a12cab27387 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-54 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-58 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-58 |
| filingDate |
2017-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_11eac8fd62b12c5f839887398c1e2bf0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9096e64bf153b236fcaf18ab7748cd69
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4ee1e12a46ca74a720accd6782a74f0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1038038c6d657369a835407275e4c84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0126a71977a96160693602786e3c4f5 |
| publicationDate |
2019-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-3558924-A1 |
| titleOfInvention |
Methods of using n-oxyl polymerization inhibitor in a wash settler for preparing methyl methacrylate |
| abstract |
The present invention provides methods comprising washing or, preferably, washing and neutralizing a sulfur acid containing crude MMA stream to generate a two phase stream containing at least methacrylic acid, methacrylamide (MAM), water and methanol, and an organic component containing methyl methacrylate and thereby form an aqueous component; including in any of the organic component, the aqueous component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream or the organic component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream one or more N-oxyl compound polymerization inhibitor; followed by separating the aqueous component from the organic component, thereby forming a treated crude MMA stream and an aqueous stream to remove residual (meth) acrylic acid. |
| priorityDate |
2016-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |