Process for dehydrating gas with sulfuric acid

US4023938A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Metallgesellschaft AG · DE

Inventors

• Hans Guth · Leverkusen, DE
• Gerhard Jonas · Leverkusen, DE
• Klaus Kleine-Weischede
• Hermann Wieschen
• Hans-Joachim Kaiser · Bensberg, DE
• Karl-Heinz Dorr
• Hugo Grimm

Key dates

• Filing date: Apr 15, 1975
• Grant date: May 17, 1977
• Expiry date: Apr 15, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B17/56
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the removal of water from a gas by contact with sulfuric acid, the improvement which comprises supplying the sulfuric acid in finely divided form having a surface of about 10.sup.4 to 10.sup.7 m.sup.2 /h at a concentration of about 95 to 99% and a temperature of about 35.degree. to 80.degree. C and with a contact time of about 0.2 to 2 seconds, whereby the residual moisture content of the gas is reduced to about 30 to 250 mg of H.sub.2 O/Nm.sup.3. Preferably the sulfuric acid is sprayed through a constriction into a vessel through which the gas is passed. The large sulfuric acid surface area permits high levels of dehydration to be achieved with far less sulfuric acid than heretofore believed possible and with small vessels and minimal contact times. Contact may be effected serially in several stages with the spent acids combined, brought up to initial concentration and recirculated.