Scientific Design Company, Inc.

Other

Sud-chemie Inc.

Sd Lizenzverwertungsgesellschaft Mbh & Co Kg

Noritake Co., Ltd.

Clariant Corporation

United Catalysts Inc.

Sud-chemie Catalysts Japan, Inc.

Scientific Design LLC

Mann, James

Castagnola, Norma Beatriz

Rokicki, Andrzej

Billig, Barry J.

Gueckel, Christian J.

Andrzej Rokicki

Nabil M Rizkalla

Serguei Pak

David L Williams

Dennis J Smith

Wojciech L Suchanek

Yuji Mishima

Howard Sachs

Shuji Kawabata

Vladimir Fridman

Kazuhiko Shinyama

Michael A Urbancic

Christian Gueckel

Takayuki Ohashi

Arie Bortinger

Barry Jay Billig

Steven A Blankenship

Mansoor Husain

Jason P Durand

James Mann

Christelle Verrier

Wojciech Suchanek

Norma Beatriz Castagnola

Jennifer A Perkins

Kyle Mankin

Rudy Anthony Morin

Lixin Cao

Christian J Gueckel

Sergei Pak

David Williams

Yuji Sud-Chemie Nissan Catalysts Inc Mishima

Kazuhiko Sud-Chemie Nissan Catalysts Inc Shinyama

Nabil Rizkalla

Barry J Billig

Michael Urbancic

Mansoor Hussein

A method for lowering the sodium content of different carriers which may have different physical properties as well as varying degrees of sodium is provided. The method, which lowers the sodium content from the surface, subsurface as well as the binding layer of the carrier, includes contacting a carrier with water. A rinse solution is recovered from the contacting. The rinse solution includes leached sodium from the carrier. The sodium content in the rinse solution is then determined. The contacting, recovering and determining are repeated until a steady state in the sodium content is achieved.

Carrier treatment to improve catalytic performance of an ethylene oxide catalyst

A silver impregnation solution comprising: (i) silver ions, (ii) a silver concentration enhancer selected from at least one ammonium salt having an anionic component that is thermally decomposable; or at least one amino acid, or a combination thereof, (iii) at least one organic amine; and (iv) water; wherein said components (i)-(iii) are dissolved in said impregnation solution, and oxalic acid may or may not be included. The silver impregnation solution can achieve significantly higher silver concentrations, including at least or above 33, 34, or 35 wt %. Methods for producing a silver catalyst by silver impregnation of a refractory support followed by calcination are also described. The resulting silver catalysts possess high silver loadings of typically at least 17, 18, or 19 wt %.

High concentration silver solutions for ethylene oxide catalyst preparation

A silver-based ethylene epoxidation catalyst is provided that exhibits improved performance, i.e., selectivity and activity decline. The catalyst that exhibits the improved performance includes greater than about 20% by weight of silver disposed on an alpha-alumina carrier, and a promoting amount of one or more promoters disposed on the alpha-alumina carrier. The silver is present on the alpha-alumina carrier as silver particles having a diameter of greater than about 150 nm and a distribution density of about 20 particles per 1 square micron or less.

Silver catalysts with improved size and distribution density of silver particles

A carrier for an ethylene epoxidation catalyst is provided that includes an alumina first component and a mixed metal oxide of alumina second component. The mixed metal oxide of alumina second component comprises a corundum lattice structure having a plurality of O&#x2014;Al&#x2014;O bonds, wherein an Al atom of at least one O&#x2014;Al&#x2014;O bond of the plurality of O&#x2014;Al&#x2014;O bonds, but not all of the plurality of O&#x2014;Al&#x2014;O bonds, is replaced with a divalent or trivalent transition metal selected from the group consisting of scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni) copper (Cu), and zinc (Zn). A catalyst containing the carrier, as well as a process for the epoxidation of ethylene using the catalyst are also disclosed.

Carrier for ethylene oxide catalysts

A silver-based ethylene oxide catalyst that can be used in the vapor phase conversion of ethylene to ethylene oxide in the presence of oxygen is provided that includes a carrier; a catalytic effective amount of silver; and a promoting amount of at least one promoter, wherein the catalyst has a surface sodium content of 100 ppm or less.

Silver-based ethylene oxide catalyst having reduced sodium content

Silver based ethylene oxide catalysts having enhanced stability are disclosed. The enhanced stability silver based ethylene oxide catalysts include an alumina carrier which has been modified to include cavities on the surface of the carrier. The presence of the cavities on the surface of the modified carrier stops or at least impedes the motion of silver particles on the surface of the carrier during an epoxidation process. In particular, the cavities on the surface of the alumina carrier effectively trap and/or anchor silver particles and prevent them from further motion.

Modified carrier for silver based ethylene oxide catalyst

A method for producing ethylene oxide comprising: providing one or more feed components, wherein the one or more feed components contains at least ethylene obtained by dehydrating ethanol; contacting the one or more feed components with a desulfurization catalyst comprising a high surface area support and an amount of silver, wherein at least 20% of the silver is present as oxidized silver; and contacting the one or more feed components with a silver-containing epoxidation catalyst disposed inside an ethylene oxide reactor to form a reaction gas comprising ethylene oxide.

Epoxidation process

A silver-based ethylene oxide catalyst is provided that has enhanced stability. The enhanced stability is obtained in the present invention by providing a silver-based ethylene oxide catalyst that includes from 100 ppm to 1000 ppm of zinc, and from greater than 450 ppm to less than 800 ppm of cesium. Zinc and cesium are promoters that are introduced to a finished carrier either prior to, coincidentally with, or subsequent to the deposition of the silver. The silver-based ethylene oxide catalyst can be used in the epoxidation of ethylene to ethylene oxide.

Zinc-promoted catalysts for epoxidation of ethylene

The present invention relates to an improved carrier for an ethylene epoxidation catalyst, the carrier comprising alumina in combination with a stability-enhancing amount of mullite. The invention is also directed to an improved catalyst containing the improved carrier, as well as an improved process for the epoxidation of ethylene using the catalyst of the invention.

Mullite-containing carrier for ethylene oxide catalysts

An improved carrier for an ethylene epoxidation catalyst is provided. The carrier includes an alumina component containing a first portion of alumina particles having a mean primary particle size of, or greater than, 2 &#x3bc;m and up to 6 &#x3bc;m, and a second portion of alumina particles having a particle size less than 2 &#x3bc;m. An improved catalyst containing the above-described carrier, as well as an improved process for the epoxidation of ethylene using the catalyst are also provided.

A process for the preparation of a catalyst useful for the vapor phase production of ethylene oxide from ethylene and oxygen comprising providing a catalyst precursor comprising an inert support having a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound disposed thereon; calcining the catalyst precursor to convert the silver in the silver containing compound to metallic silver by heating the catalyst precursor to form a catalyst; and curing the catalyst in an inert gas atmosphere at temperatures of about 250&#xb0; C. to about 600&#xb0; C. for a period of about 1 hour to 200 hours.

Method for making a highly selective ethylene oxide catalyst

A process for the dehydrogenation of a hydrocarbon feed stream, wherein the hydrocarbon feed stream substantially includes hydrocarbons containing 3 to 5 carbon atoms, wherein the process includes passing the hydrocarbon feed stream over a dehydrogenation catalyst containing from about 50 to about 90 percent by weight of an eta alumina carrier, about 10 to about 30 percent by weight of chromia and from about 0.1 to about 5 percent by weight of zirconia added as a stabilizing material.

Dehydrogenation catalyst

A process for the epoxidation of an olefin is disclosed which includes: reacting a feed gas composition containing an olefin, oxygen, and a moderator selected from the group consisting of diatomic chlorine and perhalogenated hydrocarbons, in the presence of an epoxidation catalyst.

Process for olefin oxide production

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Mountain Lakes, NJ, United States of America

Andrzej Rokicki