1
Brad L Smith, G Paull Torrence, Adolfo Aguilo, James S Alder: Methanol carbonylation process. Hoechst Celanese Corporation, Donald R Cassady, September 1, 1992: US05144068 (227 worldwide citation)

An alcohol such as methanol is reacted with carbon monoxide in a liquid reaction medium containing a rhodium catalyst stabilized with an iodide salt, especially lithium iodide, along with alkyl iodide such as methyl iodide and alkyl acetate such as methyl acetate in specified proportions. With a fin ...


2
Brad L Smith, G Paull Torrence, Adolfo Aguilo, James S Alder: Methanol carbonylation process. Hoechst Celanese Corporation, Ralph M Pritchett, Donald R Cassady, March 19, 1991: US05001259 (213 worldwide citation)

An alcohol such as methanol is reacted with carbon monoxide in a liquid reaction medium containing a rhodium catalyst stabilized with an iodide salt, especially lithium iodide, along with alkyl iodide such as methyl iodide and alkyl acetate such as methyl acetate in specified proportions. With a fin ...


3
Gordon W Calundann: Polyester of 6-hydroxy-2-naphthoic acid and para-hydroxy benzoic acid capable of readily undergoing melt processing. Celanese Corporation, Kenneth A Genoni, July 17, 1979: US04161470 (205 worldwide citation)

A novel polyester is provided which has been found to exhibit a thermotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, molded articles, etc. The polyester of the present invention is formed primarily of recurring 6-oxy-2-naphthoyl and p-o ...


4
Brad L Smith, G Paull Torrence, Adolfo Aguilo, James S Alder: Methanol carbonylation process. Hoechst Celanese Corporation, Donald R Cassady, June 25, 1991: US05026908 (195 worldwide citation)

An alcohol such as methanol is reacted with carbon monoxide in a liquid reaction medium containing a rhodium catalyst stabilized with an iodide salt, especially lithium iodide, along with alkyl iodide such as methyl iodide and alkyl acetate such as methyl acetate in specified proportions. With a fin ...


5
Ronald N DeMartino: Well-treating compositions. Celanese Corporation, October 2, 1979: US04169798 (159 worldwide citation)

This invention provides a novel hydraulic fluid composition adapted for fracturing of subterranean formations, which comprises (1) an aqueous medium, (2) methyl ether of polygalactomannan gum as a gelling agent, and (3) a breaker additive for subsequent reduction of fluid viscosity.


6
Gordon W Calundann, Herbert L Davis, Frederick J Gorman, Robert M Mininni: Melt processable thermotropic wholly aromatic polyester. Celanese Corporation, April 11, 1978: US04083829 (159 worldwide citation)

A wholly aromatic polyester is provided which has been found to be highly amenable to melt extrusion to yield high performance fibers. Such fibers following thermal treatment exhibit high tenacity and tensile modulus properties which are well retained at elevated temperatures while exhibiting a low ...


7
G Paull Torrence, Joel D Hendricks, Dennis D Dickinson, Adolfo Aguilo: Addition of hydrogen to carbon monoxide feed gas in producing acetic acid by carbonylation of methanol. Hoechst Celanese Corporation, Donald R Cassady, Depaoli & O Brien, February 19, 1991: US04994608 (156 worldwide citation)

The carbonylation of an alcohol to produce a carboxylic acid, especially methanol to produce acetic acid, in a low water reaction medium containing a rhodium catalyst stabilized with an iodide salt, especially lithium iodide, along with alkyl iodide such as methyl iodide and alkyl acetate such as me ...


8
Mark O Scates, Steven E Parker, Jennifer B Lacy, Russell K Gibbs: Recovery of acetic acid from dilute aqueous streams formed during a carbonylation process. Hoechst Celanese Corporation, Donald R Cassady, Stuart D Frenkel, February 4, 1997: US05599976 (146 worldwide citation)

A method is provided to improve the quality of recycle of certain residues by modifying the separation of alkanes and alkane-like materials and carbonyl-containing impurities from the recycle during the manufacture of acetic acid by the carbonylation of methanol. The improvement comprises partitioni ...


9
Ronald N DeMartino, Anthony B Conciatori: Cationic polygalactomannan compositions. Celanese Corporation, June 21, 1977: US04031307 (145 worldwide citation)

This invention provides novel quaternary ammonium ethers of polygalactomannan having a degree of substitution between about 0.01 and 3.0, and further provides a process for producing quaternary ammonium ethers of polygalactomannan gums by contacting solid polygalactomannan gum with a haloalkyl-subst ...


10
Gordon W Calundann: Melt processable thermotropic wholly aromatic polyester containing polybenzoyl units. Celanese Corporation, January 10, 1978: US04067852 (141 worldwide citation)

A wholly aromatic polyester is provided which unlike the aromatic polyesters normally encountered in the prior art is not intractable or difficultly tractable and readily undergoes melt processing with ease. The aromatic polyester of the present invention consists essentially of the recurring units ...