Ihe na-akpata ihe na-akpali akpali
Spent caustic bụ ihe ngwọta na-akpata ihe mkpofu nke ụlọ ọrụ mmepụta ihe nke agwụla ma gharazi aba uru (ma ọ bụ meefu). A na-eji sodium hydroxide ma ọ bụ potassium hydroxides, mmiri, na mmetọ eme ihe na-emefu ihe.  Ndị na-emerụ emerụ erichapụla ọtụtụ sodium (ma ọ bụ potassium) hydroxide ma si otú a na-emefu mmanya na-egbu egbu, dịka ọmụmaatụ, n'otu ngwa H2S (gas) na-ehichapụ na NaOH (mmiri) iji mepụta NaHS (aq) na H2O (  l), si otú ahụ na-eri caustic.

Ụdị n'ụdị 

 Ethylene spent caustic comes from the caustic scrubbing of cracked gas from an ethylene cracker.  This liquor is produced by a caustic scrubbing tower.  Ethylene product gas is contaminated with (g) and (g), and those contaminants are removed by absorption in the caustic scrubbing tower to produce (aq) and (aq). The sodium hydroxide is consumed and the resulting wastewater (ethylene spent caustic) is contaminated with the sulfides and carbonates and a small fraction of organic compounds.
 Refinery spent caustic comes from multiple sources: the Merox processing of gasoline; the Merox processing of kerosene/jet fuel; and the caustic scrubbing/Merox processing of LPG. In these streams sulfides and organic acids are removed from the product streams into the caustic phase. The sodium hydroxide is consumed and the resulting wastewaters (cresylic for gasoline; naphthenic for kerosene/jet fuel; sulfidic for LPG -spent caustics) are often mixed and called refinery spent caustic. This spent caustic is contaminated with sulfides, carbonates, and in many cases a high fraction of organic acids.

Nkà na ụzụ ọgwụgwọ 
Ihe na-emebi emebi bụ mmiri na-adịghị mma nke siri ike ịgwọ na usoro mmiri na-enweghị isi. Dị ka ọ na-adịkarị, a na-ewepụ ihe ahụ site na mgbawa dị elu na biotreatment, injection miri emi, incineration, mmiri ikuku oxidation, Humid Peroxide Oxidation ma ọ bụ usoro ndị ọzọ pụrụ iche. A na-ewepụ ihe ka ọtụtụ n'ihe ndị na-akpata ethylene a na-emefu site na ikuku ikuku ikuku.

Edensibia 

 Suarez, F. "Pluses and Minuses of Caustic Treating", Hydrocarbon Processing, peeji nke 117123, Ọktoba 1996.
 Maugans, C.; Ellis, C. "Age Old Solution for Today's SO2 and NOx", Pollution Engineering, Eprel 2004.
 Carlos T.; Maugans, C. "Oké Mmiri Mmiri Oxidation nke Refinery Spent Caustic: A Refinery Case Study", NPRA Conference, San Antonio, TX, September 2000. WAO maka Refinery Spent Caustic
 Kumfer, B.; Felch, C.; Maugans, C. "Oké Mmiri Oxidation nke Spent Caustic na Petroleum Refineries", NPRA, March 2010, San Antonio, TX. WAO maka mmefu ego na mmanụ ala Refineries