Process for the preparation of concentrated solutions of hydrazine hydrate
US4725421A · kind A · utility
8Cited by
2References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 26, 1985 |
| Grant date | Feb 16, 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 ketazines which are slightly soluble in water, by hydrolysis and distillation under pressure using a distillation column. The column is fed with the ketazine or ketazines and water wherein the water/azine molar ratio ranges between 5 and 7.75.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.