Process for cleaning vessels containing sulfur dichloride

Details Process for cleaning vessels containing sulfur dichloride Process for cleaning vessels containing sulfur dichloride

B - Operations, Transporting

08

B

141/37

B08B 9/08 (2006.01) B01D 53/68 (2006.01) C01B 17/45 (2006.01)

Patent

CA 1259887

Case 4784 PROCESS FOR CLEANING VESSELS CONTAINING SULFUR DICHLORIDE ABSTRACT OF THE DISCLOSURE An improved 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. The vessel is purged with an 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. The tank car is advantageously insulated during the heating step by enclosing the tank car in a fiberglass blanket, and the heat is supplied by a hot air blower. The liquid and gaseous materials removed from the tank car are subsequently neutralized by reaction with sodium hydroxide.

477649

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