Spent Caustic Treatment - 1
Sulfidic spent caustic from a steam cracker via the Caustic Wash Tower contains valuable sodium salts but contaminated with dissolved hydrocarbon, Red Oil polymers, and active polymer precursors. These contaminants can foul spent caustic treatment processing equipment and grossly inhibit the conversion level of sodium sulfide to its highest oxidation state—sodium sulfate…within Wet Air Oxidation Processes.
Spent Caustic Treatment Technology involve achieving virtually complete removal of the dissolved hydrocarbons, polymers, and polymer precursors from the spent caustic.
Caustic Wash Tower for the removal of CO2 and H2S from cracked gas stream using 8-12 wt% NaOH solution to form irreversibly Na2CO3 and Na2S. In order to maximize the caustic utilization, the tower is divided into either 2 or 3 caustic sections.