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 : capable of destroying or eating away by chemical action : corrosive The chemical was so caustic that it ate through the pipe. 2  2 : marked by incisive sarcasm a caustic film review caustic humor. 3  3 : relating to or being the surface or curve of a caustic (see 2caustic  2)