1
Howard W Turner, Gregory G Hlatky, Richard R Eckman: Ionic metallocene catalyst compositions. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, Ben C Cadenhead, March 30, 1993: US05198401 (428 worldwide citation)

Ionic catalyst compositions can be prepared by combining two components. The first component is a bis(cyclopentadienyl) Group IV-B metal complex containing at least one ligand which will combine irreversibly with the second component or at least a portion thereof such as a cation portion thereof. Th ...


2
Gregory G Hlatky, Howard W Turner: Catalyst system of enhanced productivity. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, August 31, 1993: US05241025 (182 worldwide citation)

This invention relates to catalyst systems, and a method for using such system, for the enhanced production of homo and copolymer products of olefin, diolefin and/or acetylenically unsaturated monomers. This invention catalyst system comprises a Group III-A element compound for improving the product ...


3
Howard W Turner, Gregory G Hlatky: Catalysts, method of preparing these catalysts, and polymerization processes wherein these catalysts are used. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, January 11, 1994: US05278119 (166 worldwide citation)

The present invention relates to catalysts, to a method for preparing such catalysts, to a method of using such catalysts and to polymeric products produced with such catalysts. The catalysts are particularly useful in the polymerization of - olefins, diolefins and acetylenically unsaturated monomer ...


4
Hosea Cheung, Michael E Huckman, G Paull Torrence: Low water methanol carbonylation process for high acetic acid production and for water balance control. Celanese International Corporation, M Susan Spiering, February 28, 2006: US07005541 (152 worldwide citation)

The invention relates to a process for the production of acetic acid by carbonylation of methanol, and reactive derivatives thereof, in a reaction mixture using a rhodium-based catalyst in low water conditions. The process is used to achieve reaction rates of at least 15 g mol/l/hr. The high rate re ...


5
Hung Cheun Cheung, Valerie Santillan, Mark O Scates, Elaine C Sibrel, G Paull Torrence: Method and apparatus for sequesting entrained and volatile catalyst species in a carbonylation process. Celanese International Corporation, M Susan Spiering, September 30, 2003: US06627770 (144 worldwide citation)

A method and apparatus for sequestering entrained or volatile catalyst species in a carbonylation process includes contacting the product stream with a vinyl pyridine or a vinyl pyrrolidone resin bed which is operative to sequester entrained or volatile catalytic species. The invention is particular ...


6
Terry J Burkhardt, Masahide Murata, William B Brandley: Method for making and using a supported metallocene catalyst system. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, August 31, 1993: US05240894 (128 worldwide citation)

The invention relates to a novel process for producing a supported metallocene catalyst system useful for the polymerization and/or copolymerization of olefins, alpha-olefins, and/or diolefins which results in a catalyst product which during polymerization, produces minimal to no reactor fouling and ...


7
Kimberly Ann Horan, Carl David Murphy, Russell Mark Stephens, R Jay Warner, Kenneth Allen Windhorst: Process improvement for continuous ethyl acetate production. Celanese International Corporation, M Susan Spiering, July 27, 2004: US06768021 (123 worldwide citation)

Disclosed herein is an improved process for producing ethyl acetate comprising contacting acetic acid and ethanol in a reaction zone in the presence of an acid catalyst, distilling formed vapors and condensing to form an organic phase rich in ethyl acetate and an aqueous phase rich in water, separat ...


8
Wayne David Picard, Mark O Scates, Stephen Charles Webb, Duane Lyle Usrey: Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream. Celanese International Corporation, M Susan Spiering, October 3, 2006: US07115772 (118 worldwide citation)

The present invention is directed to using methyl acetate from a vinyl acetate-based or a vinyl-or ethylene-alcohol based polymer or copolymer process directly for use in a methanol carbonylation production process to produce acetic acid, acetic anhydride, or a coproduction of each. Methyl acetate i ...


9
Sigmund Floyd, Elvin L Hoel: Process for production of high molecular weight EPDM elastomers using a metallocene-alumoxane catalyst system. Exxon Chemical Patents, M Susan Spiering, M B Kurtzman, July 20, 1993: US05229478 (111 worldwide citation)

A process for producing a high molecular weight EPDM elastomer having low crystallinity using a bridged bis-metallocene-alumoxane catalyst wherein the metallocene component of the catalyst has the formula: ##STR1## wherein "M" is titanium, zirconium or hafnium; each "R.sup.1 " independently is a C.s ...


10
R Jay Warner, Carl David Murphy, Gustavo Angel Robelo Grajales, Francisco Javier Sanchez Santiago, Fernando Alejo Solorzano, Jose Alfonso Torres: Process for the simultaneous coproduction and purification of ethyl acetate and isopropyl acetate. Celanese International Corporation, M Susan Spiering, July 20, 2004: US06765110 (93 worldwide citation)

This invention relates to a process for the simultaneous coproduction of ethyl acetate and isopropyl acetate. The esterification reaction comprises contacting acetic acid with a mixed alcohol stream of ethanol and isopropanol. Exemplified is a purified, Fischer Tropsch derived mixture of ethanol and ...