Process for preparing hydrazine hydrate with pyrazoline recycling
US12134558B2 · kind B2 · utility
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13References
10Claims
0Family size
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Key dates
| Filing date | May 12, 2020 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Oct 29, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for preparing hydrazine hydrate from the azine of methyl ethyl ketone obtained from methyl ethyl ketone by oxidizing ammonia with hydrogen peroxide in the presence of an activator, characterized in that it comprises a step of recycling the pyrazoline-class heterocycles purge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.