Process with calcium sulfite hemihydrate in a powdery byproduct

Details Process with calcium sulfite hemihydrate in a powdery byproduct Process with calcium sulfite hemihydrate in a powdery byproduct

1981-10-13

1984-09-11

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

106109, 106DIG1, 423242, C04B 724

Patent

active

044708505

ABSTRACT:
A byproduct recovered in a dry flue gas desulfurization method for the production of fly ash cement. The flue gas, which results from the combustion of fossil fuel and which also carries along all or a part of the fly ash which results during the combustion, is treated in an absorber with a calcium-containing suspension (absorbing substance) in such a way that the solid materials leave the absorber as dry end product and are added entirely or partially to one or more dust removing apparatuses and are filtered off. The byproduct has a composition of 1 to 99% by weight, preferably 20 to 95% by weight, of fly ash, and 1 to 99% by weight, preferably 5 to 80% by weight, of the sum of the desulfurization products, preferably comprising calcium sulfate dihydrate and/or calcium sulfate hemihydrate and/or calcium sulfate and/or calcium sulfite hemihydrate.

REFERENCES:
patent: 3785840 (1974-01-01), Minnick et al.
patent: 4134774 (1979-01-01), Heese et al.
patent: 4279873 (1981-07-01), Felsvang et al.
patent: 4297332 (1981-10-01), Tatani et al.
patent: 4331640 (1982-05-01), Morita et al.
patent: 4344796 (1982-08-01), Minnick
patent: 4354876 (1982-10-01), Webster
patent: 4377414 (1983-03-01), Buschmann et al.

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