http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2018230078-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | 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/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate | 2016-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_266e70684df1880e3fc82eb6816cf815 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7df40c2f4f15580768f33229fb3be779 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09f4a18b201d95f3c90038b7bcc9a6a9 |
| publicationDate | 2018-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2018230078-A1 |
| titleOfInvention | Method for producing high-purity terephthalic acid |
| abstract | A method for producing high-purity terephthalic acid, comprising following steps (a) to (c):n the step (a); obtaining crude terephthalic acid crystal by liquid phase-oxidizing a p-phenylene compound; the step (b); obtaining a terephthalic acid crystal slurry by a catalytic hydrogenation treatment of the crude terephthalic acid crystal; and the step (c); introducing the terephthalic acid crystal slurry into an upper portion of a mother liquor replacement tower, and bringing the slurry into contact with an upward flow of replacement water introduced from a bottom portion of the mother liquor replacement tower while making the terephthalic acid crystal settled down in the tower, and extracting the terephthalic acid crystal as a slurry with the replacement water from the tower bottom portion, wherein (1) a stirring blade unit is disposed in a slurry layer in the bottom portion of the mother liquor replacement tower, and fluidity of the slurry layer is maintained by rotating the stirring blade unit in such a way that stirring power is 0.1 to 1.0 kWh/m 3 per unit volume of the slurry layer, and (2) the replacement water is fed through the replacement water feed opening provided in the stirring blade unit. |
| priorityDate | 2015-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.