Milham S Howie

US Patent:

55435378, Aug 6, 1996

Filed:

May 8, 1995

Appl. No.:

8/436695

Inventors:

David C. Eisenberg - Baton Rouge LA
Milind M. Pradhan - Baton Rouge LA
Milham S. Howie - Baton Rouge LA

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C07F 506

US Classification:

556157

Abstract:

Trimethylaluminum is made by an alkyl exchange process by first reacting a trialkylaluminum which has at least two carbon atoms in its alkyl groups with a methyl halide, optionally in the presence of an alkyl exchange catalyst, and then fractionally distilling trimethylaluminum from the product mixture in the presence of trialkylaluminum having at least two carbon atoms in its alkyl groups so as to convert the dimethylaluminum halide by-product of the alkyl exchange reaction into trimethylaluminum.

US Patent:

55653952, Oct 15, 1996

Filed:

May 26, 1995

Appl. No.:

8/452170

Inventors:

Samuel A. Sangokoya - Baton Rouge LA
Milham S. Howie - Baton Rouge LA
Patrick G. Simms - Baton Rouge LA
Karl E. Wiegand - Baton Rouge LA

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

B01J 3100
B01J 3700
C08F 402
C08F 506

US Classification:

502103

Abstract:

An aluminoxanate composition which can be used as a co-catalyst with transition, lanthanide or actinide metal compounds such as metallocenes comprises the solid reaction product of an aluminoxane and an alkali metal, alkaline earth metal, ammonium, phosphonium or sulfonium salt of a Group 13 to 16 element-containing polyoxy compound such as sodium aluminate.

US Patent:

50666312, Nov 19, 1991

Filed:

Oct 16, 1990

Appl. No.:

7/598117

Inventors:

Samuel A. Sangokoya - Baton Rouge LA
Milham S. Howie - Baton Rouge LA
Todd A. Trumbo - Baton Rouge LA

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C08F 452

US Classification:

502152

Abstract:

A hydrocarbon solvent solution of alkylaluminoxane comprises a hydrocarbon solvent having dissolved therein methylaluminoxane and an effective amount to solubilize the methylaluminoxane in the solvent of tri-n-alkylaluminum wherein the alkyl groups each contain at least two carbon atoms.

US Patent:

51570084, Oct 20, 1992

Filed:

Aug 1, 1991

Appl. No.:

7/739225

Inventors:

Samuel A. Sangokoya - Baton Rouge LA
Milham S. Howie - Baton Rouge LA
Aaron L. Dunaway - Baton Rouge LA

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C08F 464

US Classification:

502111

Abstract:

Hydrocarbon solvent solutions of alkylaluminoxane are made by mixing trimethylaluminum and a hydrocarbylaluminum compound, which compound contains at least one hydrocarbyl group having 2 or more carbon atoms, in a hydrocarbon solvent and thereafter adding water or a hydrated compound so as to form a solution of alkylaluminoxane in said solvent.