Eliminating hydrogen sulfide from liquid ammonia
US8491798B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Mar 13, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/365
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Processes for selectively eliminating hydrogen sulfide from liquid ammonia, either anhydrous or aqueous, are described herein. The processes generally include contacting a first liquid stream, anhydrous or aqueous, comprising ammonia and hydrogen sulfide, with a solution comprising sulfur dioxide to convert the hydrogen sulfide to thiosulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.