TREATMENT OF CAUSTIC WASTE FROM WET AIR OXIDATION PROCESS

摘要

A B S T R A C TA continuous process for the treatment of acaustic waste by wet oxidation comprising the steps of:a. adjusting the pH of a portion of the raw wasteto below 11.0 by contacting said waste with anacid or carbon dioxide;b. oxidizing the neutralized waste obtained instep (a) with an oxygen-containing gas in awet oxidation reactor to produce a gas streamrich in carbon dioxide;c. cooling the hot reactor effluents and separatingthe oxidized liquor from the noncondensiblegases containing carbon dioxide;d. contacting said noncondensible gases withadditional incoming raw caustic waste toneutralize said waste with the carbon dioxidecontent of said gases; ande. continuously repeating steps b, c and d in acyclic process.Preferably the oxygen-containing gas by which theneutralized waste is oxidized contains 60-100 volume percentoxygen so as to have a high strength of carbon dioxide inthe noncondensible gases.