Leonard Joseph Kressley

US Patent:

41014510, Jul 18, 1978

Filed:

Jan 19, 1977

Appl. No.:

5/760775

Inventors:

Ludo K. Frevel - Midland MI
Leonard J. Kressley - Saginaw MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01J 2104
B01J 2372
B01J 2356
B01J 2374

US Classification:

252465

Abstract:

The activity and resistance to sulfur poisoning of a catalyst consisting essentially of copper and one or more activator metals supported on high surface area gamma-alumina and suitable for selectively hydrogenating alpha-acetylenes in a hydrocarbon stream is enhanced by impregnating the catalyst with aqueous alkali metal hydroxide and heating the impregnated catalyst at about 350. degree. C-650. degree. C. This treatment is effective to increase catalytic activity both in freshly prepared catalyst and in used catalyst poisoned by sulfur which has been regenerated by treatment with aqueous alkali metal hydroxide, heating to an elevated temperature, and leaching with water.

US Patent:

39664180, Jun 29, 1976

Filed:

Feb 28, 1975

Appl. No.:

5/553958

Inventors:

Ludo K. Frevel - Midland MI
Leonard J. Kressley - Saginaw MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C01B 1756
B01D 5000
B01J 100

US Classification:

23284

Abstract:

A gas treatment apparatus suitable for removing sulfur oxides and dust from gas streams is disclosed. The gas to be treated is conveyed through a conduit and past at least one nozzle positioned in fluid communicaton with the interior of the conduit. The nozzle injects an atomized solution, such as an alkali metal carbonate solution, into the gas. Solids formed by contacting the gas with the solution collect on the inner surface of a conical funnel-shaped portion of a hollow body. The hollow body includes a conduit portion in coaxial alignment with the hollow body. The solids are first removed from the hollow body by a screw conveyer positioned on the conical funnel-shaped portion and then withdrawn through a solids exit port. Gases formed by the contact of the gas with the injected solution are removed through a gas exit port in the hollow body and a gas passageway defined by the inner surface of the hollow body and the outer surface of the conduit portion.