Edward E Murray

US Patent:

40226360, May 10, 1977

Filed:

Mar 29, 1976

Appl. No.:

5/671430

Inventors:

Edward Conley Murray - Oklahoma City OK

Assignee:

Kerr-McGee Chemical Corporation - Oklahoma City OK

International Classification:

C09C 136

US Classification:

106300

Abstract:

The present invention provides an improved process for coating titanium dioxide with precipitated alumina (aluminum oxide) for use as a pigment in plastics wherein a first coating of amorphous alumina is precipitated onto the titanium dioxide and then a second coating of crystalline alumina is precipitated over the first coating. In operation, the pH of an aqueous slurry of titanium dioxide pigment is adjusted to be within a first pH range as the first alumina coating is effected by adding an amount of sodium aluminate to the aqueous slurry and then the pH of the slurry is adjusted to be within a second pH range while a second amount of sodium aluminate is added to form the second coating over the first coating. The present invention also contemplates an improved titanium dioxide pigment having a first coating of amorphous alumina and a second coating of boehmite alumina.

US Patent:

41789814, Dec 18, 1979

Filed:

Jun 29, 1978

Appl. No.:

5/920466

Inventors:

Edward C. Murray - Edmond OK

Assignee:

Kerr-McGee Corporation - Oklahoma City OK

International Classification:

B22C 300

US Classification:

164 72

Abstract:

A copper mold release material comprising titanium dioxide slurried in a liquid medium. The titanium dioxide is easily removed from a casting, if any adhers thereto, by washing with, for example, water and does not contaminate electrolytes utilized in electrolytic refining processes.

US Patent:

39819744, Sep 21, 1976

Filed:

May 20, 1974

Appl. No.:

5/471221

Inventors:

Peter Coad - Midwest City OK
Edward Conley Murray - Oklahoma City OK
Homer Charles Reed - Newport Beach CA

Assignee:

Kerr-McGee Chemical Corporation - Oklahoma City OK

International Classification:

C01B 1516
C01B 2526

US Classification:

423315

Abstract:

The present invention relates to a method for producing an alkali metal pyrophosphate useful, for example, as a plant food. Broadly, the method comprises reacting an alkali metal nitrate and aqueous phosphoric acid in the presence of catalytic amount of a metal oxide at a temperature of at least about 700. degree. C to produce a substantially pure alkali metal pyrophosphate and gaseous reaction products.