http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109809377-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-238 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-237 |
| filingDate | 2019-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109809377-B |
| titleOfInvention | Method for efficiently removing impurities from wet-process phosphoric acid by sulfuric acid process |
| abstract | The invention relates to a method for efficiently removing impurities from sulfuric acid process wet-process phosphoric acid, which is characterized in that one or more of calcium-containing inorganic substances, aluminum-containing inorganic substances, silicon-containing inorganic substances, sulfur-containing inorganic substances or fluorine-containing inorganic substances are added into the sulfuric acid process wet-process phosphoric acid, and the molar ratio of Ca, Al, Si, S and F in the sulfuric acid process wet-process phosphoric acid is adjusted to (3.8-12) to (0.8-1.2) to (1-1.20): (1-1.20) and (12-15) reacting to make Ca, Al, Si, S and F impurity elements in sulfuric acid process wet-process phosphoric acid as Ca 4 AlSiSO 4 F 13 ·12H 2 The form of O is precipitated, thereby achieving the purpose of purification. Compared with the prior art, the invention removes five impurity elements in the wet-process phosphoric acid by changing the components of the wet-process phosphoric acid at one time, so that the main impurity element in the wet-process phosphoric acid is compound Ca 4 AlSiSO 4 F 13 ·12H 2 The O is precipitated, thereby realizing the aim of wet-process phosphoric acid purification. |
| priorityDate | 2019-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 65.