公开(公告)号：GB894381A

公开(公告)日：1962-04-18

申请号：GB940460

申请日：1960-03-17

Applicant: BASF AG

Inventor： SPORMANN WALTER ,  CITIZENS JOACHIM HEINKE

IPC: B01J2/30 ,  C01B25/30 ,  C01D5/00 ,  C01D5/14 ,  C01D5/18

Abstract: Moist salts which form a higher hydrate below a hydration conversion temperature are suspended in a current of air or inert gas and cooled therein at least to the conversion temperature, whereby the free water is taken up in the formation of the higher hydrate. The operation is preferably effected in a fluidized bed. Examples refer to the production of hydrates of sodium sulphate and sulphite from the moist salts by treatment with air in a fluidized bed. Reference is also made to sodium thiosulphate, carbonate, phosphate and sulphide, ferrous sulphate, ferric chloride, magnesium chloride, bromide and sulphate, calcium chloride and nitrate and sulphates of manganese, cadmium, uranium, zinc and copper.