Eugene Palka

US Patent:

51341085, Jul 28, 1992

Filed:

May 22, 1991

Appl. No.:

7/703923

Inventors:

Deepak S. Thakur - Solon OH
Eugene Palka - Parma OH
Thomas J. Sullivan - Strongsville OH
Eugene Nebesh - Parma OH
Brian D. Roberts - Cleveland Heights OH

Assignee:

Engelhard Corporation - Edison NJ

International Classification:

B01J 3703
B01J 2322
B01J 2306
B01J 2324

US Classification:

502318

Abstract:

This hydrogenation catalyst comprises a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a promoter metal selected from the group consisting of manganese, barium, zinc, nickel, cobalt, cadmium, iron and any combination thereof provided that the promotor metal is not zinc if the first metal is zinc. The average particle diameter of the powder is from about 6 to about 20 microns; and the particle surface area is from about 20 to about 70 m. sup. 2 /g. The process for preparing this catalyst comprises the steps of (A) simultaneously and adding to a first vessel, (1) a first aqueous solution comprising a copper or zinc salt; (2) a second aqueous solution comprising a soluble base, provided that either the copper solution or the soluble base solution also contains a soluble salt of at least one second metal; or (3) a third aqueous solution comprising a soluble salt of at least one seocnd metal is added simultaneously to the first vessel whereby an aqueous slurry of insoluble solid is formed in the first vessel, provided further that the second metal is chromium, molybdenum, tungsten, or vanadium; (B) advancing at least a portion of the aqueous slurry from the first vessel to a second vessel; (C) recovering the solids from the aqueous slurry in the second vessel; and (D) calcining the recovered solids.

US Patent:

60546271, Apr 25, 2000

Filed:

May 27, 1992

Appl. No.:

7/889557

Inventors:

Deepak S. Thakur - Solon OH
Eugene Palka - Parma OH
Thomas I. Sullivan - Strongsville OH
Eugene Nebesh - Parma OH
Brian D. Roberts - Cleveland Hts. OH

Assignee:

Engelhard Corporation - Iselin NJ

International Classification:

C07C 3700

US Classification:

568799

Abstract:

Disclosed are catalysts in powdered form comprising a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a promoter metal selected from the group consisting of manganese, barium, zinc, nickel, cobalt, cadmium, iron and any combination thereof provided that the promoter metal is not zinc if the first metal is zinc, wherein the average particle diameter of the powder is from about 6 to about 20 microns; and the particle surface area is from about 20 to about 70 m. sup. 2 /g. Also disclosed is a process for preparing such catalysts and a process for hydrogenating aldehydes, ketones, carboxylic acids and carboxylic acid esters with catalysts of the type described.

US Patent:

50807188, Jan 14, 1992

Filed:

Feb 23, 1989

Appl. No.:

7/315406

Inventors:

Thomas J. Sullivan - Strongsville OH
Deepak S. Thakur - Solon OH
Brian D. Roberts - Solon OH
Mark E. Gall - Cleveland Hts. OH
Eugene Palka - Parma OH

Assignee:

Engelhard Corporation - Edison NJ

International Classification:

C09C 100
C09C 122
C09C 134

US Classification:

106453

Abstract:

A pigment of irregular-shaped particles is described which comprises crystallites of the empirical formula A. sub. x B. sub. y C. sub. z wherein A and B are different; A is cobalt, nickel, copper, zinc, cadmium, iron, manganese or any combination thereof; B is aluminum, chromium, molybdenum, iron, vanadium, manganese or any combination thereof; C is oxygen, selenium, tellurium or sulfur; x is 1, 2 or 3; y is 2 or 3; and z is greater than 3; the crystallites have an average size of from about 75 to about 600 Angstroms; and the surface area of the pigment particles is greater than zero up to about 20 m. sup. 2 /g. In one embodiment, when the pigment contains a mixture of copper oxide, iron oxide, manganese oxide and no chromium, the pigment contains no more than 10% of manganese, and when the pigment contains copper oxide, chromium oxide, and manganese oxide, the pigment contains up to about 5% of manganese oxide, the mole ratio of chromium to copper is no greater than about 1. 3 to 1.