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AssigneesBayer Aktiengesellschaft, Metallgesellschaft Aktiengesellschaft
InventorsHans Guth, Gerhard Jonas, Klaus Kleine-Weischede, Hermann Wieschen, Hans-Joachim Kaiser, Karl-Heinz Dorr, Hugo Grimm
Estimating the term…
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.
In the removal of water from a gas containing about 5 to 30 g of water per Nm.sup.3 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.
In a process of absorbing gaseous constituents from gases in liquid absorbents, particularly of absorbing SO.sub.3 or moisture in sulfuric acid or of absorbing water from dilute sulfuric acid in hot gases, which comprises injecting liquid absorbent into the upper portion of a vertical venturi tube absorber to flow cocurrently with the gases, collecting a large part of the injected liquid absorbent in a sump below the outlet end of the vertical venturi tube absorber, feeding the gases together with the residual liquid absorbent below the outlet end of the vertical venturi tube absorber and above the sump into a substantially horizontal venturi tube absorber, feeding the mixture of gases and liquid absorbent from the horizontal venturi tube absorber into a settling chamber which contains a mechanical separating zone for a removal of fine droplets in the upper portion of the settling chamber before the gas outlet, and collecting the liquid absorbent in a sump at the bottom of the settling chamber, the improvement which comprises injecting liquid into the outlet end of at least one of the vertical and horizontal venturi tube absorbers to flow countercurrently to the gases.
Dependencies are inferred from the claim text.