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alkali refining. in fat and oil processing: Alkali refining. Many of these can be removed by treating fats at 40Â° to 85Â° C (104Â° to 185Â° F) with an aqueous solution of caustic soda ( sodium hydroxide) or soda ash (sodium carbonate). The refining may be done in a tank (in which case it is called batch or tank refining) or in a continuous system.
Potassium Hydroxide in the Oil and Gas Industry. Potassium hydroxide, commonly called caustic potash, has many industrial uses and is found in many chemicals that contain potassium. The oil and gas industry uses potassium hydroxide to improve drilling and well efficiency as well as in the refining process.