Applicants holding driving licence/learnerâs licence/conductorâs licence desire for noting change of address shall make an application on plain paper along with documents and any one of the following proof of address :
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.
Definition of caustic. 1  1 : a caustic agent: such asa : a substance that burns or destroys organic tissue by chemical actionb : a strong corrosive alkali (such as sodium hydroxide 2  ) 2 : the envelope of rays emanating from a point and reflected or refracted by a curved surface.