C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
23/276
C01D 1/36 (2006.01) C02F 11/08 (2006.01)
Patent
CA 1152290
A B S T R A C T A continuous process for the treatment of a caustic waste by wet oxidation comprising the steps of: a. adjusting the pH of a portion of the raw waste to below 11.0 by contacting said waste with an acid or carbon dioxide; b. oxidizing the neutralized waste obtained in step (a) with an oxygen-containing gas in a wet oxidation reactor to produce a gas stream rich in carbon dioxide; c. cooling the hot reactor effluents and separating the oxidized liquor from the noncondensible gases containing carbon dioxide; d. contacting said noncondensible gases with additional incoming raw caustic waste to neutralize said waste with the carbon dioxide content of said gases; and e. continuously repeating steps b, c and d in a cyclic process. Preferably the oxygen-containing gas by which the neutralized waste is oxidized contains 60-100 volume percent oxygen so as to have a high strength of carbon dioxide in the noncondensible gases.
392673
Smart & Biggar
Sterling Drug Inc.
LandOfFree
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