http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3910998-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-42 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42 |
| filingDate | 1971-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1975-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ab1796092a04bd94a6e96278f19801f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_205b121f36f7ae0d5b0508ae0db918a2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a7fac86160ed2a47b73945f546087b68 |
| publicationDate | 1975-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3910998-A |
| titleOfInvention | Process for preparation of substantially refined methylterephthalic and or 4-methylisophthalic acid |
| abstract | A process for the preparation of a substantially refined methylbenzene dicarboxylic acid selected from methylterephthalic acid and 4-methylisophthalic acid, which comprises mixing a solid crude product of at least one methylbenzene dicarboxylic acid selected from the group consisting of methylterephthalic acid and 4-methylisophthalic acid, which is obtained by oxidizing pseudocumene with molecular oxygen in the presence of a cobalt catalyst, with acetic acid or an aqueous solution of acetic acid in an amount sufficient to dissolve the methylbenzene dicarboxylic acid substantially therein, the water content of the aqueous solution of acetic acid being up to 40 % by weight; thus dissolving the methylbenzene dicarboxylic acid in acetic acid or the aqueous solution of acetic acid at a temperature of 80*220*C. while leaving substantially in the undissolved state impure coloring materials contained in the solid crude product; separating the undissolved solids from the resulting liquid while maintaining the temperature at 80*-220*C.; and recovering the methylbenzene dicarboxylic acid in the form of solids from the remaining solution. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11278696-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10744292-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2022160985-A1 |
| priorityDate | 1971-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 63.