http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6447746-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-40 |
| filingDate | 1987-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_03c75f61393d10bd18d5d6837ef2e639 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_72d15fbfc61658ca7c1a4041c543edc9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee4330e5f0bb13dd34c82f3bb44f7789 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_010ea261f22ad1758a67ec40ff541e14 |
| publicationDate | 1989-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6447746-A |
| titleOfInvention | Production of 5-amino-2,4,-triiodoisophthalic acid |
| abstract | PURPOSE:To obtain 5-amino-2,4,6-triiodophthalic acid (AIPA) useful as an intermediate for Roentgen contrast medium having extremely low intravenous toxicity, by treating filtrate after crystal separation obtained by producing AIPA with an active carbon and then concentrating the filtrate in order to re-utilizing the filtrate. CONSTITUTION:When 5-amino-2,4,6-triiodoisophthalic acid (AIPA) is produced, a filtrate obtained by separating a product crystal is treated with an active carbon or ion exchange resin to decolorize and purify the filtrate. Then the filtrate is concentrated and excess water and hydrochloric acid is distilled out to give about 20wt.% aqueous hydrochloric acid solution containing AIPA and other unreacted material, which is then re-utilized as a raw material of AIPA for dissolving iodine monochloride or as a reaction solvent. By the above- mentioned method, unit consumption of the raw material is improved and waste treating process is simplified or obviated. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H04303772-A |
| priorityDate | 1987-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.