Method of improving the properties of urea granules
US8343891B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Oct 6, 2003 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G3/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of improving the properties of urea granulates, more especially the caking tendency, the dust formation and the foaming tendency in aqueous media, by the addition of an additive to the urea, wherein the additive comprises a carboxylic acid compound with the general formula XY—(Z)—COOH, in which Z is a saturated or unsaturated hydrocarbon with 1-25 carbon atoms and X and Y are selected from the group consisting of a hydrogen atom or a polar organic functional group, and in that the additive is added as a solution in a polar solvent to the urea granulates, which are subsequently dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.