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How Are Spent Caustics Generated?
SpentCaustic.com

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Specializing in the Treatment and Disposal of Spent Caustics, Waste Caustics, Toxic Wastes and Other Hazardous Waste Streams
Servicing  Industry Since 1984



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Overview Of TEXOX Process

What Are Spent Caustics?

How Are Spent Caustics Generated?

Properties Of Spent Caustics

Disposal Characteristics Of Spent Caustics

Disposal Alternatives For Spent Caustics

Results Following Treatment

Case History

Tragedy In The Ivory Coast - What Not To Do

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            SPENT CAUSTICS are generated from many industrial processes.  Most are generated from the refining of petroleum to remove undesired SULFUR compounds from fuels. 

            In the refining industry, the net hydrogen sulfide captured in spent caustics is too low for effective sulfur recovery in typical Sulfur Recovery Units (SRU's) employing the common Claus Process, therefore, the spent caustics must be disposed properly.  In addition to the toxic hydrogen sulfide, both toxic mercaptans and phenolics are often captured in spent caustics, severely limiting the disposal options.

            Other spent caustics are generated from LPG (Liquefied Petroleum Gas) manufacturing, natural gas processing, and natural sources like geothermal power plants.  The most common sources are listed below in red together with the categories in blue identifying the type of spent caustic generated:

      • Acid Gas Recovery
        • Sulfidic Spent Caustic
        • Sour Water (weakly Sulfidic Spent Caustic)

           
      • Sulfur Sweetening Of Crude Oil Feedstocks
        • Sulfidic Spent Caustic
        • Disulfidic Spent Caustic
        • Mercaptanic Spent Caustic
        • Phenolic Spent Caustic
        • Cresylic Spent Caustic
        • Naphthenic Spent Caustic

      • MeroxTM Sweetening Units
        • Sulfidic Spent Caustic
        • Disulfidic Spent Caustic
        • Mercaptanic Spent Caustic

           
      • LPG Sweetening
        • Sulfidic Spent Caustic
        • Mercaptanic Spent Caustic

          •  
      • Gasoline Sweetening
        • Phenolic Spent Caustic
        • Cresylic Spent Caustic
        • Sulfidic Spent Caustic

          •  
      • Diesel Fuel Sweetening
        • Phenolic Spent Caustic
        • Cresylic Spent Caustic
        • Disulfidic Spent Caustic
        • Naphthenic Spent Caustic
        • Sulfidic Spent Caustic

          •  
      • Kerosene Sweetening
        • Sulfidic Spent Caustic
        • Cresylic Spent Caustic

          •  
      • Chemical Manufacturing
        • Sulfidic Spent Caustic

          •  
      • Geothermal Steam Condensate
        • Sulfidic Spent Caustic
        • Sour Water



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