| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c5d35cbcd18261ca6afc76a9f64ae2a1 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate |
1990-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1992-05-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ec51ef233cf3ea8f0da155726855dba |
| publicationDate |
1992-05-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5110984-A |
| titleOfInvention |
Process for increasing the yield of purified isophthalic acid and reducing waste-water treatment a |
| abstract |
The invention is an improved method of purification of isophthalic acid comprising recycling a portion of the mother liquor solution into the feed solution of an isophthalic acid purification process. The improved method comprises the following steps: (a) dissolving crude isophthalic acid in a feed solution comprising a polar solvent at a temperature of from about 100 DEG C. to about 300 DEG C.; (b) crystallizing the isophthalic acid by cooling the solution of step (a) to a temperature of from about 35 DEG C. to about 120 DEG C.; (c) separating the isophthalic acid crystals from the solution and drying the crystals; and (d) recycling a portion of the solution remaining after the separation of isophthalic acid crystals back to the feed solution. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005288527-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005283022-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5961935-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103140482-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004110980-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5929274-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008159929-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5767311-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7196215-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6013835-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6310239-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0818434-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0818434-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6113866-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9957090-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6639104-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7074954-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6140534-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004110981-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7556784-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7485747-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6054610-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6689903-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7161027-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6034269-A |
| priorityDate |
1990-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |