Method and apparatus for vaporizing liquid chlorine containing nitrogen trichloride
US10377629B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2010 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Aug 19, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/075
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of safely vaporizing liquid chlorine containing high concentrations of nitrogen trichloride contaminant from a chloralkali plant. In a vertical plug-flow vaporizer having an upward flow direction, a stream of liquid chlorine containing nitrogen trichloride is received. A gas such as air, nitrogen or chlorine gas is introduced into the liquid stream upstream of the boiling zone of the vaporizer to induce a flow regime, for example annular flow or mist flow, that prevents a mass accumulation of nitrogen trichloride in the vaporizer. The liquid chlorine containing nitrogen trichloride is vaporized. The resulting gas stream may be processed to destroy the nitrogen trichloride and recycled to the chlorine production train.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.