http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9969670-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6660167441edb2ac3d2d8445b278307 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-573 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C57-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-573 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56 |
| filingDate | 2015-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2018-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4eda8de80b909f1f6f31754fe0ff3a6c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6cb70f69e90ef0110f634a53f8f131ee http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f653de6007dc41f69b67dddf45e36229 |
| publicationDate | 2018-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-9969670-B2 |
| titleOfInvention | Synthesis of (meth) acrylic anhydride by transanhydrization |
| abstract | The invention relates to a method for producing a (meth)acrylic anhydride A-C(═O)—O—(O═)C-A, comprising the following steps: a) a step of reacting an anhydride B—C(═O)—O—(O═)C—B with an acid A-COOH, resulting in the formation of mixed anhydride A-C(═O)—O—(O═)C—B and acid B—COOH; and b) a step of reacting the mixed anhydride with A-COOH, resulting in the (meth)acrylic anhydride. According to the invention, reaction steps (a) and (b) are carried out in the presence of hydrated triflic acid, and the anhydride A-C(═O)—O—(O═)C-A is isolated from the reaction medium produced in step (b) as follows: e1) heavy compounds having a volatility less than or equal to that of the anhydride A-C(═O)—O—(O═)C-A are separated from the reaction medium, said compounds including the anhydride and the hydrated triflic acid; e2) the anhydride is separated from the heavy compounds by difference in volatility. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021048335-A1 |
| priorityDate | 2014-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.