Preparation of high bulk density anhydrous sodium carbonate crys

Details Preparation of high bulk density anhydrous sodium carbonate crys Preparation of high bulk density anhydrous sodium carbonate crys

1986-10-27

1988-04-19

Straub, Gary P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

23302T, 423421, C01D 712, C01D 722, C01D 726

Patent

active

047388366

ABSTRACT:
Sodium carbonate having a high bulk density and pseudo-cubic crystal structure is prepared from impure trona purge liquors from the crystallizers containing high concentration of organics, silica and sulfate by a sequence of steps involving (1) treatment of the liquors with MgO; (2) separation of the treated liquor from the insoluble reaction products; (3) addition of Ca and Mg compounds to the liquor; (4) evaporating the solution to obtain sodium carbonate monohydrate crystals; (5) separating the crystals from the mother liquor; and (6) heating the crystals at temperature of about 150.degree.-200.degree. C. to convert to dense ash.

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