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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.
Lowest refining losses, consumption of utilities such as steam, power and water, lowest consumption of chemicals such as caustic soda, bleaching agents and degumming agents and minimum operating personnel are salient features of TROIKA refining plants.