HuagongsheHuagongshe Chemistry Print Report · For research reference only
Phosphoric Acid → Phosphoric Acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Phosphoric Acid | HCID 1004 | — |
| Reactant | Sulfuric Acid | HCID 1118 | — |
| Reactant | Phosphorus oxide (P4O10) | HCID 14812 | — |
| Reactant | Tricalcium Phosphate | HCID 24456 | — |
| Product | Phosphoric Acid | HCID 1004 | — |
| Product | Calcium Sulfate, Hemihydrate | HCID 3033839 | — |
Reaction Steps
Superphosphoric acid (SPA), which is used in the manufacture of fertilizers, is phosphoric acid containing about 68 to about 70% by weight of P2O5. It can be manufactured by dissolving calcium phosphate rock with sulfuric acid, producing a slurry of calcium sulfate hemihydrate in a solution of phosphoric acid. The slurry is filtered and the calcium sulfate hemihydrate filter cake is discarded. The filtered acid is evaporated to about 48% P2O5 for further purification.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04994248 |
| Source dataset | uspto-grants-1991_02 |
| ORD ID | ord-fae809bf43444268aaf4af06b8409a02 |
| Source note | uspto-grants-1991_02 |