Method for recovering hydrogen chloride from chlorine based...

Details Method for recovering hydrogen chloride from chlorine based... Method for recovering hydrogen chloride from chlorine based...

2005-05-24

2005-05-24

Nguyen, N M. (Department: 1754)

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

C423S241000, C588S253000, C588S253000

Reexamination Certificate

active

06896865

ABSTRACT:
To provide a process for recovering high quality hydrogen chloride rationally with good economical efficiency, particularly hydrogen chloride with an elevated quality level to be provided as the feedstock for the oxychlorination reaction in producing dichloroethane and a vinyl chloride monomer from a hydrogen chloride gas to be generated by the combustion of chlorine based waste. To use a process for recovering hydrogen chloride from chlorine based waste comprises adding water and a reducing agent to an acid gas obtained by the combustion of chlorine based waste to effect reaction to obtain a crude hydrogen chloride aqueous solution having an oxidation-reduction potential of not higher than 900 mV and then, distilling the crude hydrogen chloride aqueous solution to obtain a purified hydrogen chloride gas.

REFERENCES:
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patent: 0619268 (1994-10-01), None
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patent: 11-80746 (1999-03-01), None
patent: 11-158319 (1999-06-01), None
patent: 11-286687 (1999-10-01), None

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