Alkali regenerating process

Details Alkali regenerating process Alkali regenerating process

C - Chemistry, Metallurgy

01

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23/273, 23/277

C01D 1/32 (2006.01) C01B 13/18 (2006.01) C01D 1/00 (2006.01) C01D 1/04 (2006.01) D21C 11/00 (2006.01) F23G 7/04 (2006.01)

Patent

CA 1115490

ABSTRACT In the regeneration of alkaline liquors as used in paper pulping, a mixed oxide compound of an alkali or alkaline earth metal oxide and an oxide of Ti, Fe, Co, Ni, or Mn is formed by burning black liquor. The burning step is carried out in a fluidized be?. The mixed oxide product is washed in cold water and subsequently treated with hot water to precipitate the oxide of Ti, Fe, Co, Ni or Mn and enable recovery of the alkaline solution for recycling.

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