Cationic polymers for use in freeze protection of coals and minerals
US4426409A · kind A · utility
26Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Jul 2, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for treating fine particles such as minerals and coal particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particles prior to freezing with an effective amount of a dilute aqueous solution of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical. In a preferred embodiment of the invention, there is also included in the aqueous solution of the freezing point depressant polymer solution from 1/2 to about 5% by weight of gelatin or hydrolyzed gelatin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.