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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.
Caustic soda is an essential ingredient in many industrial and commercial applications. It is a strong, colorless. alkali. Caustic soda is manufactured through the electrolysis of sodium chloride (salt brine). Axiall Corporation. produces liquid caustic soda as 50% and 73% solutions in water. Axiall is one of the largest global producers of.