Wet-grinding gypsum with polycarboxylates
US7861955B2 · kind B2 · utility
14Cited by
14References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2007 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Feb 13, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The process of the present invention includes obtaining a feed material having an initial median particle size. A solution of a polycarboxylate dispersant in water is formed, then the feed material is added to the solution to form a slurry. The slurry is wet-ground to reduce the median particle size of the feed material. Optionally, the total amount of polycarboxylate dispersant is divided into a plurality of doses that are added periodically over the total grinding time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.