Method of preparing powder of a solid carbazic acid derivative
US9079829B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C281/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present disclosure relates to a method of preparing powder of a solid carbazic acid derivative, which involves inducing a reaction of a liquid hydrazine derivative with carbon dioxide at a high pressure of from about 0.5 MPa to about 100 MPa. During the reaction, the pressure may range from about 0.5 MPa to about 100 MPa. In this regard, although the reaction of the carbon dioxide with the liquid hydrazine derivative occurs when the pressure is adjusted to below than about 0.5 MPa, sticky precipitates in a form of gel are gradually produced but the powder is not produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.