Agent for grinding lime to augment its reactivity
US5275650A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Nov 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A grinding agent for refining coarse lime by grinding in an aqueous medium to a microparticulate size, composed of a water-soluble ethylene polymer and/or copolymer, wherein, said grinding agent: PA1 a) is formed from a least one monocarboxylic ethylenically unsaturated monomer, and PA1 b) has an average molecular weight of between 200 and 1,900 g/mole. Grinding in the presence of the grinding agent allows the production of aqueous lime suspensions which have a high concentration of dry material expressed in weight percent, preferably between 40% and 60%, with particles of a size of less than 4 microns and median diameter of less than 2.9 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.