Carl J Greco

US Patent:

51698080, Dec 8, 1992

Filed:

Apr 10, 1992

Appl. No.:

7/870189

Inventors:

Thomas A. Gallo - Thornwood NY
Carl C. Greco - Garnerville NY

Assignee:

Akzo nv - Arnhem

International Classification:

C04B 3556
C01G 104

US Classification:

501 87

Abstract:

Metal carbides can be formed by the pyrolysis of a composition comprising metal and carboxylic acid residues bonded therein, the composition being substantially free of extraneous carbon and also having metal moieties that are not in the substituent position. Dicarboxylic acids, for example, can be reacted with either metal alkoxides or metal halides to form an oligomer or polymer which can be calcined to the metal carbide. Alternatively, a metal alkoxide can be reacted with a monocarboxylic acid to form a metal alkoxide carboxylate which can be heated to the metal carbide. Finally, a metal carboxylate can be heated to form the desired metal carbide.

US Patent:

46819592, Jul 21, 1987

Filed:

Apr 22, 1985

Appl. No.:

6/725847

Inventors:

Richard J. Ayen - Darien CT
Johst H. Burk - Mohegan Lake NY
Carl C. Greco - Garnerville NY

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C07F 728
C07F 700
C07F 100
C07F 300
C07F 500
C07F 502

US Classification:

556 54

Abstract:

A number of processes for the formation of insoluble metal alkoxides are disclosed. In one embodiment, there is disclosed a two step process wherein a halide of an at least divalent metal is reacted with an appropriate alcohol in the first step. In the second step, the intermediate compound formed is then reacted with more alcohol, said alcohol forming part of a solvent system in which the final metal alkoxide formed is insoluble. In another embodiment, a two step process is disclosed wherein the intermediate formed in the first step is isolated, and then in the second step the intermediate is reacted with an appropriate alcohol to yield the final product. The final embodiment of the present invention comprises a one step process for the production of insoluble metal alkoxides wherein a halide of an at least divalent metal is reacted with an appropriate alcohol in the presence of an excess amount of a hydrogen halide acceptor in a solvent in which the hydrogen halide compound formed is soluble.