http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5738313-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/C01B25-238 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-237 |
| filingDate | 1980-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a5b363debecfa7b340439c60526f51c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ddc782e28b67d1c149307ed744694e6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_664cebf5de893294a015defe134e65c8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_81a25c356e17dd3440ae0beedf8ba3b4 |
| publicationDate | 1982-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5738313-A |
| titleOfInvention | Purifying method for phosphoric acid solution |
| abstract | PURPOSE: To attain a low arsenic content below a limit which is conventionally impossible or difficult to attain by previously adding a powdered inorg. arsenic compound to a phosphoric acid soln. to be freed of arsenic with H 2 S or a soluble sulfide. n CONSTITUTION: To a phosphoric acid soln. is added about 2W50wt.ppm solid arsenic or inorg. arsenic compound such as arsenic acid, and they are mixed. H 2 S or a soluble sulfide such as sodium sulfide is then added and reacted with arsenic in the soln. to produce arsenic sulfide crystals. The crystals are filtered off, and the resulting phosphoric acid soln. is optionally degassed with air or the like to remove dissolved H 2 S. By this method, the arsenic concn. of the phosphoric acid soln. can be reduced to ≤ about 0.01ppm. n COPYRIGHT: (C)1982,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115072682-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4652380-A |
| priorityDate | 1980-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.