Process for the preparation of nitrosyl chloride
US6238638A · kind A · utility
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4References
7Claims
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Key dates
| Filing date | Feb 16, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/0846
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of nitrosyl chloride from a solution of nitrosylsulphuric acid in sulphuric acid and from hydrogen chloride, the said process being characterized in that the solution of nitrosylsulphuric acid is substantially free of water and that aqueous hydrochloric acid and gaseous hydrogen chloride are used in amounts such that the molar ratio of aqueous hydrochloric acid to nitrosylsulphuric acid is between 0.25 and 1.2 and the molar ratio of aqueous hydrochloric acid and of gaseous hydrogen chloride to nitrosylsulphuric acid is between 1.25 and 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.