Trona calcination

Details Trona calcination Trona calcination

1975-06-17

1977-05-03

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423206T, 423421, C01D 700

Patent

active

040215253

ABSTRACT:
In the process of making sodium carbonate from trona involving the steps of crushing the trona, calcining the crushed trona, dissolving the calcined trona to obtain a solution comprising sodium carbonate and insoluble impurities contaminated by soluble silicates and soluble carbonaceous matter, contamination of the sodium carbonate solution with soluble silicates is reduced by the improvement which comprises calcining the crushed trona at temperature of 200.degree. C. to 600.degree. C. in the presence of an additive selected from the group consisting of aluminum oxide and bauxite. When the trona is calcined in the presence of aluminum oxide or bauxite at temperatures of 350.degree. to 600.degree. C., then the sodium carbonate solution is low in both soluble silicate as well as carbonaceous matter.

REFERENCES:
patent: 3838189 (1974-09-01), Sopchak et al.
patent: 3870780 (1975-03-01), Guptill

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