Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Patent
1989-01-04
1991-01-15
Pal, Asok
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
134 10, 134 11, 134 42, 208390, 585867, B08B 308
Patent
active
049850830
ABSTRACT:
A method and an assembly for decontaminating a material. The material is charged into a container, where at first steam is introduced and fluids including some contaminants are removed. Then extractant is introduced into the container, and fluids comprising condensation water, extractant and contaminants are removed. Then the material is stripped with vapor. The dry or slightly humid material in the container is removed in a condition suitable for return to its place of origin. The used extractant can be purified to be re-used.
REFERENCES:
patent: 1514113 (1924-11-01), Trumble
patent: 2596793 (1952-05-01), Schabelitz
patent: 3475318 (1969-10-01), Gable et al.
patent: 4387016 (1983-06-01), Gagon
patent: 4424112 (1984-01-01), Rendall
patent: 4424113 (1984-01-01), Mitchell
patent: 4532024 (1985-07-01), Haschke et al.
patent: 4606774 (1986-08-01), Morris
Published PCT appln. of Keane, WO 82/04440, PCT/US82/00819, International publication date 12/1982.
Published PCT appln. of Klockner & Co., WO 86/03134, PCT/EP85/00643, International publication date 6/1986.
A/S Phonix Contractors
Pal Asok
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