Cathy L Tway

US Patent:

20040102643, May 27, 2004

Filed:

Nov 27, 2002

Appl. No.:

10/306664

Inventors:

Cathy Tway - League City TX, US

International Classification:

B01J021/02
B01J027/14
C07C253/24

US Classification:

558/325000, 502/202000, 502/208000, 502/209000, 502/210000, 502/211000, 502/212000, 502/311000, 502/325000, 562/536000

Abstract:

A process for preparing an antimonate-based mixed metal oxide catalyst in a catalytically active oxidized state, wherein the catalyst is represented by the empirical formula MeSbXQRO, wherein Me, X, Q, R, a, b, c, d, e, and f are as defined herein, comprising (a) contacting an aqueous SbOslurry with HNOand one or more Me compounds, and, optionally, one or more compounds selected from X, Q, or R compounds to form a first mixture; (b) heating and drying the first mixture to form a solid product; and (c) calcining the solid product to form the catalyst, the catalysts prepared by the process, and the use of the catalysts in ammoxidation and oxidation processes. The catalysts of the invention are particularly useful for the production of acrylonitrile from propylene, ammonia, and an oxygen-containing gas.

US Patent:

20080132723, Jun 5, 2008

Filed:

Dec 4, 2006

Appl. No.:

11/633194

Inventors:

Victor J. Johnston - Houston TX, US
Joseph G. Duff - League City TX, US
Debra Ann Ryan - League City TX, US
Deborah R. Repman - Houston TX, US
Melchior A. Meilchen - Houston TX, US
David W. Townsend - Friendswood TX, US
Cathy L. Tway - League City TX, US

International Classification:

C07C 67/00
C09K 3/00

US Classification:

560241, 252372

Abstract:

The present invention provides an integrated, optimized process for the production of ethylene, carbon monoxide and acetic acid from an ethane feed, including reacting ethane with oxygen in the presence of a catalyst to produce ethylene, carbon monoxide and acetic acid in a reactor, wherein the catalyst comprises the elements Mo, Pd, X, and Y in the gram-atomic ratios MOPdXY, and the oxygen partial pressure in the reactor is about 15 psia to about 50 psia. The partial pressure of ethane in the reactor is about 50 psia to about 150 psia.

US Patent:

20100280261, Nov 4, 2010

Filed:

Apr 10, 2010

Appl. No.:

12/757984

Inventors:

Kevin E. Howard - Midland MI, US
Cathy L. Tway - Midland MI, US
Peter C. Lebaron - Hope MI, US
Jamie L. Lovelace - Bay City MI, US
Hirokazu Shibata - Bergen op Zoom, NL

Assignee:

DOW TECHNOLOGY INVESTMENTS LLC - Midland MI

International Classification:

C07D 317/36
B01J 23/14
B01J 31/06
B01J 23/68
B01J 23/36
C07D 301/10
C07C 29/00
C07C 213/02
C07C 41/03

US Classification:

549230, 502349, 502159, 502347, 549536, 568867, 568704, 568672

Abstract:

The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors are germanium doped and comprise a precursor alumina blend. It has now surprisingly been discovered that inclusion of germanium, alone or in combination with such a blend, in porous body precursors can provide control over, or improvements to, surface morphology, physical properties, and/or surface chemistry of shaped porous bodies based thereupon. Surprisingly and advantageously, heat treating the shaped porous bodies can result in additional morphological changes so that additional fine tuning of the shaped porous bodies is possible in subsequent steps.

US Patent:

20130158289, Jun 20, 2013

Filed:

Dec 15, 2011

Appl. No.:

13/327401

Inventors:

Joseph G. Duff - League City TX, US
Stephen Kerlegon - League City TX, US
Kien V. Phung - Pearland TX, US
Tatiana H. Sonnenberg - Houston TX, US
Cathy L. Tway - Shepherd MI, US
Hang Wang - Houston TX, US

Assignee:

CELANESE INTERNATIONAL CORPORATION - Dallas TX

International Classification:

C07C 67/04
C07C 67/54

US Classification:

560261

Abstract:

In one embodiment, the invention is to a process for producing a vinyl acetate composition by contacting a vinyl acetate stream with acetic acid, ethylene, and oxygen to form a reaction mixture and reacting the reaction mixture in a reactor under conditions effective to form a crude vinyl acetate composition comprising vinyl acetate, water, acetic acid and at least 0.1 wt % diacetoxyethylene.

US Patent:

20140024766, Jan 23, 2014

Filed:

Jul 20, 2012

Appl. No.:

13/554599

Inventors:

Joseph G. Duff - League City TX, US
Stephen Kerlegon - League City TX, US
Tatiana H. Sonnenberg - Houston TX, US
Cathy Tway - Shepherd MI, US
Hang Wang - Houston TX, US

Assignee:

Celanese International Corporation - Irving TX

International Classification:

C08F 216/06
C08L 29/04
C08F 8/00

US Classification:

524557, 525 60

Abstract:

In one embodiment, the invention is to a vinyl acetate/diacetoxyethylene copolymer, processes of making the copolymer and processes of hydrolyzing said copolymer to form a copolymerized polyvinyl alcohol.

US Patent:

20190184387, Jun 20, 2019

Filed:

Aug 30, 2017

Appl. No.:

16/328033

Inventors:

- Midland MI, US
Apoorva Kulkarni - Pearland TX, US
Vera P. Santos Castro - Terneuzen, NL
Victor J. Sussman - Midland MI, US
John C. McKeen - Hope MI, US
Cathy L. Tway - Midland MI, US
Clifford S. Todd - Midland MI, US

International Classification:

B01J 37/02
B01J 23/50
B01J 37/00
B01J 21/04
B01J 37/08
B01J 35/10
C07D 301/03
C07C 68/00
C07C 213/00
C07C 41/02
C07C 29/00

Abstract:

A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).

US Patent:

20140363666, Dec 11, 2014

Filed:

Jan 24, 2013

Appl. No.:

14/370193

Inventors:

- Midland MI, US
William G. Stobby - Ann Arbor MI, US
Beata A. Kilos - Midland MI, US
Cathy L. Tway - Midland MI, US
Dean Millar - Midland MI, US
Kevin J. Bouck - Midland MI, US

Assignee:

Dow Global Technologies LLC - Midland MI

International Classification:

C08J 9/00
C08G 18/42
C08G 18/72
C08G 18/08

US Classification:

428340, 521122

Abstract:

Disclosed herein are polyisocyanurate and/or polyurethane foams containing non-porous silica particles derived from mesoporous cellular foams, wherein the polyisocyanurate and/or polyurethane foams have enhanced heat and/or fire resistance. Processes for making such foams and methods of using them are also disclosed.

US Patent:

20140295165, Oct 2, 2014

Filed:

Nov 19, 2012

Appl. No.:

14/352423

Inventors:

- Midland MI, US
Cathy L. Tway - Midland MI, US
Scott T. Matteucci - Midland MI, US
Christopher J. Tucker - Midland MI, US

Assignee:

Dow Global Technologies LLC - Midland MI

International Classification:

C01B 33/12

US Classification:

428221, 423339

Abstract:

A process comprising: A) contacting one or more of sources of silicon oxide, selected from water sol-uble.silica sources arid alkali metal silicates, with an aqueous reaction medium, comprising one or more nonionic surfactants and thereby forming mesoporous structures comprising crosslinked silicon oxide units, wherein said cross-linked silicon oxide units have pores of about 1 to about 100 nanometers and wherein the aqueous reaction medium exhibits a pH of about 0 to about 4.0; B) exposing the aqueous reaction medium containing the mesoporous structures to elevated temperatures for a time sufficient to achieve the desired structure and pore size. Preferred water soluble silica sources comprise silicic acid, or po!ysilicic acids, The aqueous reaction, medium is prepared by combining one or more nonionic surfactants and water, theteby forming an aqueous, reaction medium. comprising micelles. Preferably, the aqueous reaction medium further comprises, a. micelle swelling agent capable of swelling micelles formed by the surfactant in the aqueous reaction medium. In one embodiment the process forms structures with struts comprised of crosslinked silicon oxides which connect at least some of the pore forming structures.