Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1993-11-18
1995-01-10
Spear, Frank
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210763, 210806, B01D 902
Patent
active
053804422
ABSTRACT:
Waste materials are removed from Stretford solution in the form of sulfates by catalytic oxidation. The Stretford solution, which was used to treat sulfur contaminated gas streams is first regenerated by oxidation to restore the vanadium present to a pentavalent form. It is then passed to a reaction zone where it is contacted with a catalyst and an oxygen source. The catalyst comprises a porous solid substrate on which a metal or metal compound insoluble in Stretford solution is deposited. Waste materials, primarily thiosulfates, are thus oxidized to sulfates. The effluent of the reaction zone is then passed to a crystallizer, where the sulfates are precipitated out as crystals of Glauber's salt. The Glauber's salt is recovered as a product and the Stretford solution is recycled to a scrubber for the treatment of gas streams.
REFERENCES:
patent: 3959452 (1976-05-01), Espenscheid et al.
patent: 4124685 (1978-11-01), Tarhan et al.
patent: 4360508 (1982-11-01), Farrington et al.
patent: 4364918 (1982-12-01), Espenscheid
patent: 5112494 (1992-05-01), Yan
"Unit Operations of Chemical Engineering", McCabe & Smith, pp. 875-880.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Prater Penny L.
Spear Frank
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