Process for removing hydrazine from hydroxlyamine solutions
US8703088B2 · kind B2 · utility
0Cited by
8References
6Claims
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Key dates
| Filing date | Jul 29, 2013 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jul 29, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.