Process for making abrasion-resistant sodium tripolyphosphate
US4391783A · kind A · utility
4Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1982 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Mar 8, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/412
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The disclosure relates to a process for making granular sodium tripolyphosphate of high abrasion resistance. To this end, the disclosure provides for sodium orthophosphate to be subjected to a one-stage spray-drying operation inside a heated spray tower by means of a nozzle with condensation of the orthophosphate. More particularly the orthophosphate is sprayed jointly with a solution of a high molecular weight phosphate of sodium, potassium or ammonium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.