| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J20-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-238 |
| filingDate |
1992-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bceccd921209cc547068929100b8dc89 |
| publicationDate |
1994-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H0648712-A |
| titleOfInvention |
Purification method of phosphoric acid solution |
| abstract |
(57) [Summary] [Structure] In a method of reacting arsenic in a phosphoric acid solution with hydrogen sulfide gas to remove arsenic in the phosphoric acid solution as a sulfide, the temperature is changed to a phosphoric acid solution at a temperature of 30 to 80 ° C. A sulfide, which is a reaction product, is dispersed in advance by dispersing hydrogen sulfide gas in a weight ratio of 30 to 150 times with respect to the arsenic content in the phosphoric acid solution and reacting it, and then in an activated carbon tower filled with coal-based activated carbon. Adsorb and remove minutes. [Effect] Arsenic in the phosphoric acid solution can be removed up to 0.01 ppm. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7470414-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1321058-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6861039-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115072682-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1640340-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1640340-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0040507-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009114064-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102431982-A |
| priorityDate |
1992-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |