Leslie S Depew

US Patent:

57193150, Feb 17, 1998

Filed:

Dec 13, 1996

Appl. No.:

8/766258

Inventors:

Gerald Charles Tustin - Kingsport TN
Joseph Robert Zoeller - Kingsport TN
Leslie Sharon Depew - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 6700

US Classification:

560238

Abstract:

This invention pertains to the preparation of vinyl acetate by contacting within a contact zone a mixture of ketene and acetaldehyde with an acid catalyst at about one bar pressure and between about 85. degree. and 200. degree. C. and removing the reaction products from the contact zone.

US Patent:

61214981, Sep 19, 2000

Filed:

Apr 30, 1998

Appl. No.:

9/069953

Inventors:

Gerald C. Tustin - Kingsport TN
Leslie S. Depew - Kingsport TN
Nick A. Collins - Fall Branch TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 4700
C07C 4500
B01J 2300
B01J 2342

US Classification:

568420

Abstract:

A method of producing acetaldehyde hydrogenates acetic acid in the presence of an iron oxide catalyst containing between 2. 5 and 90 wt % Pd, more preferably 10 and 80 wt % Pd and most preferably 20 and 60 wt % Pd. The catalyst has a specific surface area of less than 150 m. sup. 2 /g. Hydrogen and acetic acid are fed to a reactor in a hydrogen to acetic acid ratio of 2:1 to 25:1, more preferably in a hydrogen to acetic acid ratio of 3:1 to 15:1 and most preferably in a hydrogen to acetic acid ratio of 4:1 to 12:1. The hydrogenation is performed at a temperature of about 250. degree. C. to 400. degree. C. , more preferably about 270. degree. C. to 350. degree. C. and most preferably about 280. degree. C. to 325. degree. C. The hydrogenation of acetic acid produces a partially gaseous product, and acetaldehyde is absorbed from the partially gaseous product with a solvent containing acetic acid. The gas remaining after the absorption step contains hydrogen, and this gas is recycled for the hydrogenation of acetic acid.

US Patent:

56798709, Oct 21, 1997

Filed:

Mar 21, 1996

Appl. No.:

8/619385

Inventors:

Gerald Charles Tustin - Kingsport TN
Leslie Sharon Depew - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 4500

US Classification:

568489

Abstract:

Disclosed is a process for the preparation of acetaldehyde by the hydrogenation of ketene in the presence of a transition metal hydrogenation catalyst.

US Patent:

57314560, Mar 24, 1998

Filed:

Dec 13, 1996

Appl. No.:

8/766248

Inventors:

Gerald Charles Tustin - Kingsport TN
Joseph Robert Zoeller - Kingsport TN
Leslie Sharon Depew - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 6700

US Classification:

560238

Abstract:

This invention pertains to the preparation of vinyl acetate by contacting a mixture of hydrogen and ketene with a heterogeneous catalyst containing a transition metal to produce acetaldehyde, which is then reacted with ketene in the presence of an acid catalyst to produce vinyl acetate.

US Patent:

20220251020, Aug 11, 2022

Filed:

Nov 12, 2019

Appl. No.:

17/309384

Inventors:

- Kingsport TN, US
Sumit Chakraborty - Johnson City TN, US
Leslie Sharon Depew - Kingsport TN, US

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 67/44
B01J 23/52

Abstract:

A process for direct esterification of an alkyl aldehyde with an alkyl alcohol to produce an alkyl ester is disclosed. The process comprises reacting an alkyl aldehyde with an alkyl alcohol in the presence of an Au/TiOa catalyst, a base and an enal or oxygen to form an ester and an aldehyde. The process avoids liberation of water and avoids the step of oxidation of the alkyl aldehyde to an alkyl acid.

US Patent:

20170167133, Jun 15, 2017

Filed:

Dec 9, 2015

Appl. No.:

14/963693

Inventors:

- Kingsport TN, US
Pruthesh Hariharrao Vargantwar - Kingsport TN, US
Leslie Sharon Depew - Kingsport TN, US
Glen Dennis Shields - Kingsport TN, US
Jennifer Lynn Cogar - Unicoi TN, US

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

E04B 1/76
C09D 105/16
C09K 5/06
C09D 5/26

Abstract:

A stable emulsion having a fluid medium; a phase change material (PCM) comprising a straight, branched and/or cyclic aliphatic moiety having from 3 to 18 carbon atoms, polymers, and copolymers having residues of the straight, branched and/or cyclic aliphatic moiety; and a modified cyclodextrin having at least one functional moiety capable of forming a stable emulsion with the PCM in the fluid medium. The invention further includes a modified paint or surface coating having from 10 to 99 weight % of a base coating and from 1 to 90 weight % of the stable emulsion admixed therein.