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/C07C67-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-54 |
filingDate |
2017-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0126a71977a96160693602786e3c4f5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9096e64bf153b236fcaf18ab7748cd69 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1038038c6d657369a835407275e4c84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4ee1e12a46ca74a720accd6782a74f0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_11eac8fd62b12c5f839887398c1e2bf0 |
publicationDate |
2018-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
WO-2018118461-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 |