Enhanced recovery of useful coal, potassium chloride and borax from screen bowl centrifuge
US7087174B2 · kind B2 · utility
1Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jun 1, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/0876
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of enhancing the recovery of useful coal or potassium chloride or borax from screenbowl centrifuge separation operations comprising adding to the screenbowl centrifuge, from about 0.03 lbs active polymer/ton dry solids in centrifuge to about 0.70 lbs active polymer/ton dry solids in centrifuge, of a cationic terpolymer, wherein said cationic terpolymer is prepared by polymerizing from about 1 to about 99.1 mole percent of one or more cationic monomers, from about 0.1 to about 10 mole percent of one or more hydroxyalkyl(meth)acrylates and from one to about 98.1 mole percent of one or more nonionic monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.