Acid concentration control in SO.sub.3 absorption

Details Acid concentration control in SO.sub.3 absorption Acid concentration control in SO.sub.3 absorption

1994-03-01

1996-07-23

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423533, C01B 1769

Patent

active

055387071

ABSTRACT:
The concentration of sulfuric acid exiting a countercurrent SO.sub.3 absorber is controlled by controlled addition of water vapor to the SO.sub.3 -containing process gas stream entering the absorber. The novel means of concentration control is useful for control of the acid concentration gradient in an SO.sub.3 absorption process and apparatus for high temperature absorption, so as to achieve high temperature absorption heat recovery while minimizing corrosion and formation of acid mist.

REFERENCES:
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patent: 4670242 (1987-06-01), McAlister et al.
patent: 4996038 (1991-02-01), McAlister et al.
patent: 5118490 (1992-06-01), McAlister
patent: 5130112 (1992-07-01), McAlister et al.

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