http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RO-86655-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bcd600c789c13101f39db5af4f289a97 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2231-70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-403 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-4015 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-92 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-92 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-39 |
| filingDate | 1980-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_951de2356944c9ca9d5c86beef9ea056 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d8df95d0e57ac28d5c852a81bf445da http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1026782c71520362c642e9ad67b96bfa |
| publicationDate | 1985-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RO-86655-B |
| titleOfInvention | PROCEDURE FOR REGENERATION OF AN OXIDATION CATALYST |
| abstract | The invention relates to a process for the regeneration of the cobalt-based catalyst and possibly manganese and nickel, from oxidation by the Witten-dimethyl terephthalate process, used for oxidation in the oxidation in the liquid phase with oxygen or with a gas containing oxygen of the mixture containing p xylene and / or p-toluic acid methyl ester at 4-5 atm pressure and temperatures of 140-170 ° C, characterized in that the extracts containing 0.2-20g / l of cobalt, 0.05-10% g / l of manganese and 0.05-10 g / l of nickel are treated with a mineral acid in the presence of an oxidizing agent such as H2O2 at an elevated temperature, followed by raising the pH by addition of alkali and heating to precipitate iron and chromium hydroxides, the common filtration of the hydroxides thus obtained as well as the insoluble ash components, dilution with water and acidification of the filtrate with aliphatic monocarboxylic acids, linear with 1 to 4 carbon atoms, to obtain a regenerated catalyst solution which is on a strongly acidic cation exchange resin loaded with Co @ 2 at 2+, Mn at 2+ and / or Ni at 2+ to remove sodium ions, followed by a highly acidic cation exchange resin loaded with Na + or K + ions to reach the exchange capacity, then the resin is regenerated with sodium acetate or aqueous potassium and the resulting solution contains 10-70 g / l cobalt, 1-35 g / l manganese, possibly 1-35 g / l nickel as well as 5 mg / l iron, 5 mg / l chromium, 5 mg / l molybdenum, 5 mg / l vanadium, 5 mg / l copper and 5 mg / l titanium. |
| priorityDate | 1979-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.