http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2472327-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad2cd796f8c4dcb425ddcc68707d3444 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_21b60bbc4dc5a40e778edca966d3b0ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_696ca0ae93d5cf5a686273601361781f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J49-50 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 |
| filingDate | 2007-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4204a7d21fa99614ddbad70570509d8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_28b893f9378cc44130605a5f1eae2a7b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_affa9c9a207b78c08b550af4c0d70ee1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a257b5fed95200df04e25c175344420 |
| publicationDate | 2014-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2472327-T3 |
| titleOfInvention | Procedure for the production of terephthalic acid |
| abstract | Method for producing terephthalic acid, characterized in that it comprises: subjecting a p-phenylene compound to a liquid phase oxidation reaction by using a gas containing molecular oxygen in the presence of a catalyst containing at least one heavy metal compound and a bromine compound, and aqueous acetic acid having a water content of 1 to 15% by mass, to thereby produce a suspension; regulate the temperature of the suspension at 35 to 140 ° C, thereby causing terephthalic acid to precipitate; extract the terephthalic acid through solid-liquid separation, to thereby recover the mother liquors; and recovering the catalyst from the mother liquor through a series of the following steps from (1) to (4) to reuse at least a portion of the catalyst in the liquid phase oxidation reaction: (1) an adsorption stage that it includes regulating the ratio "amount in moles of bromide ions in the mother liquors / total amount in moles of heavy metal ions in the mother liquors" to 0.6 to 3, and then exposing the mother liquors to a chelate resin that it contains a pyridine ring that has been heated to 35 to 140 ° C, so that the resin adsorbs bromide ions and heavy metal ions derived from the catalyst, and also adsorbs a mixture of carboxylic acid that has been produced as a byproduct through the reaction of oxidation in liquid phase (hereinafter the mixture of carboxylic acid will be called "mixture of carboxylic acid produced as a byproduct"), (2) an elution step (A) of exposing aqueous acetic acid or having a water content of 1 to 15% by mass to the pyridine ring-containing chelate resin that has undergone the adsorption step, thereby producing an eluate containing the mixture of carboxylic acid produced as a byproduct, ( 3) an elution stage (B) of exposing water or aqueous acetic acid having a water content of 20% by mass or more to the pyridine ring-containing chelate resin experienced by the elution stage (A), thereby producing an eluate containing bromide ions and heavy metal ions derived from the catalyst, and (4) a displacement step of exposing aqueous acetic acid having a water content of 1 to 15% by mass to the chelate resin It contains a pyridine ring that has undergone the elution stage (B), which serves as a displacement liquid, thereby regenerating the resin. |
| priorityDate | 2006-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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