Cleaning and liquid contact with solids – Processes – Including regeneration – purification – recovery or separation...
Patent
1985-06-10
1986-07-01
Corbin, Arthur L.
Cleaning and liquid contact with solids
Processes
Including regeneration, purification, recovery or separation...
134 19, 134 21, 134 221, B08B 908
Patent
active
045978034
ABSTRACT:
A process for cleaning vessels containing liquid sulfur dichloride is disclosed. The sulfur dichloride is first removed from the vessel leaving a heel (residue) of liquid and solid material on the bottom of the vessel. The remaining liquid is vaporized by heating the vessel, and the vapors are removed by vacuum and purging, and neutralized by reaction with a basic solution. The vessel is purged with a dry inert gas during heating to prevent exothermic reactions and the formation of toxic reaction products, and to assist in removal of vapors from the vessel. The solid residue remaining in the vessel is then removed from both the bottom and wall portions. In a preferred aspect, the present invention is particularly applicable to cleaning railroad tank cars which are used to transport sulfur dichloride.
REFERENCES:
patent: 1849932 (1932-03-01), Johnson et al.
patent: 3163134 (1964-12-01), Stratford
patent: 4136624 (1979-01-01), Kato et al.
patent: 4220480 (1980-09-01), Dwan
patent: 4332626 (1982-06-01), Hood et al.
patent: 4545822 (1985-10-01), Stodolka
Corbin Arthur L.
Gosz William G.
Occidental Chemical Corporation
Tao James F.
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