Preparation of concentrated aqueous solution of hydrazine hydrate
US4724133A · kind A · utility
5Cited by
2References
14Claims
0Family size
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Key dates
| Filing date | Jul 26, 1985 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Jul 26, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A continuous method for the preparation of concentrated aqueous solutions of hydrazine hydrate from concentrated aqueous solutions of acetone azine by a hydrolysis reaction and distillation under pressure in a column. The concentration of the aqueous solution of acetone azine is such that the water/azine molar ratio ranges between 3 and 7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.