Dow Global Technolgoies LLC

The Dow Chemical Company

Blue Cube IP LLC

The Cynara Co.

Thomas Caldwell Young

Ritchie A Wessling

Stephen E Bales

Henry N Beck

George J Quarderer, Jr

Thomas O Jeanes

David J Moll

Philip J Carlberg

William G Worley

Kent B McReynolds

Alan F Burmester

Bethanne L Smith

Charles Z Hotz

Ronald M Lacher

James E Clark

Robert M Drake

David H West

Shuji Maeda

John A Jensvold

Ha Q Pham

Tina L Arrowood

Paul R Elowe

William I Harris

Ravindra S Dixit

H Robert Goltz

Clinton J Boriack

Damian Feord

Terrence L Caskey

Johnny L Trimmer

George E Mahley, Iii

James R Stahlbush

Harlan Robert Goltz

Johann-Wilhelm Frey

Michael D Cloeter

Dan Tirtowidjojo

Jason C MacDonald

Leming Gu

Edward Kronenberger

Ernesto Occhiello

Mark E Busbice

Jesus A Atias

Katherine H Stahlbush, Legal Representative

Edward Alan Fraini

David R Brooks

Randall A Yoshisato

Carl H Penner

Elwin G Collier

Joachim Drewing

Paulo Alfonso Dos Santos Pereira

Andreas Tigges

Roland Werner

Mark S Burkinshaw

A process comprising: a) contacting a polyhydric phenol and an epihalohydrin in the presence of a catalyst under reaction conditions to form an organic feed comprising a bishalohydrin ether and a solvent; b) contacting the organic feed and an aqueous feed comprising an inorganic hydroxide in a reciprocating-plate column reactor under reaction conditions to form a dispersed aqueous phase and an organic product; and c) collecting the organic product comprising an epoxy resin, is disclosed.

Reciprocating-plate column reactor for epoxidation of epoxy resins

A process comprising: a) contacting a polyhydric phenol and an epihalohydrin in the presence of a catalyst under reaction conditions to form an organic feed comprising a bishalohydrin ether; b) contacting the organic feed and an aqueous feed comprising an inorganic hydroxide with a high shear mixer to produce a first mixed feed; c) contacting the first mixed feed with a phase separator to form a first organic product comprising an epoxy resin and a first aqueous product; and d) recovering the first organic product, is disclosed.

Epdxy resin production

An improved method of preparing an ion exchange resin catalyst by partial neutralization of the ion exchange resin catalyst with a promoter. The promoter and a fluid are introduced into a vessel or a reactor which is partially filled with the ion exchange resin catalyst forming an ion exchange resin catalyst bed in the vessel or reactor. The fluid and the promoter are recirculated in an upflow direction at a velocity sufficient to partially fluidize the ion exchange resin catalyst bed and to achieve a rapid uniform distribution of the promoter throughout the catalyst bed.

Preparation of catalyst for bisphenols production

A process comprising contacting a polyhydric phenol or a polyaliphatic alcohol with an epihalohydrin in the presence of a catalyst comprising a Schiff base metal complex is disclosed.

Epoxy resin production

Use a modified, amine-functionalized anion exchange resin as a catalyst to produce a bishalohydrin ether and then dehydrohalogenate the bishalohydrin ether with an aqueous inorganic hydroxide mixture to yield a liquid epoxy resin.

Production of epoxy resins using improved ion exchange resin catalysts

Methods and apparatus for the recovery and purification of solid salt compositions from an organic liquid containing epoxy resin and at least one of epihalohydrin and solvent to obtain purified salt and/or brine compositions that may be useful in industrial processes.

Process and apparatus for purifying solid salt compositions

A process for the production of liquid epoxy resins, including: contacting a polyhydric phenol and an epihalohydrin in the presence of an ionic catalyst to form a halohydrin intermediate reaction product; concurrently: reacting a portion of the halohydrin intermediate reaction product with an alkali hydroxide to form a solid salt suspended in a liquid mixture including a dehydrohalogenated product and unreacted halohydrin intermediate, wherein the alkali hydroxide is used at less than a stoichiometric amount; and removing water and epihalohydrin as a vapor from the reacting mixture; separating the solid salt from the liquid mixture; reacting at least a portion of the unreacted halohydrin intermediate with an alkali hydroxide in the presence of water to form an organic mixture including an epoxy resin and unreacted epihalohydrin and an aqueous solution including a salt; separating the aqueous mixture from the organic mixture; and separating the unreacted epihalohydrin from the liquid epoxy resin.

Process for manufacturing liquid epoxy resins

Methods for removing methanol from acetone recycle streams during bisphenol-A production, thereby avoiding the deactivation of catalyst, by distilling an acetone-methanol-water comprising mixture such that acetone is taken overhead in form of a relatively pure distillate, and substantial portions of the methanol and the water are leaving with the bottom product.

Method of reducing methanol in recycle streams in bisphenol-A production process

A method for preventing the degradation of a catalyst during storage of the catalyst and prior to using the catalyst in a chemical process comprising treating the catalyst with an antioxidant and storing the treated catalyst until further use. The stabilized treated catalyst may be used in a process for producing organic chemicals such as in a process for producing bisphenol A.

Method for stabilizing a cation exchange resin prior to use as an acid catalyst and use of said stabilized cation exchange resin in a chemical process

Bisphenol-A is purified in a process which comprises the following steps: a) cooling a liquid mixture comprising bisphenol-A and water in a bisphenol-A crystallizer to form bisphenol-A crystals in a liquid phase; b) separating the bisphenol-A crystals from the liquid phase; c) dividing at least a portion of the liquid phase into a bisphenol-rich organic phase and a water-rich phase; d) feeding phenol and at least a portion of the bisphenol-rich organic phase into a adduct crystallizer to form a crystalline adduct of phenol and bisphenol-A in a mother liquor, and e) separating the crystalline adduct from the mother liquor. Bisphenol-A of high purity at a high yield is obtained.

Process for purifying bisphenol-a

A process for preparing articles having a fluorocarbonsulfonic ionomer layer, such as membranes and catalysts, is disclosed wherein the fluorocarbonsulfonic ionomer is deposited upon support using an new annealing process. The annealing process of the present invention includes the step of heating a fluorocarbonsulfonic ionomer coated substrate in the presence of a vaporous solvent. This process provides for fluorocarbonsulfonic ionomer coated articles which can be annealed quickly at temperatures below the degradation point of many desirable support materials.

Process for depositing a fluorocarbonsulfonic ionomer on a support and

Gas separations utilizing glassy polymer membranes at sub-ambient

This invention relates to a method of and apparatus for separating component gases in a gas mixture employing a glassy polymer membrane at temperatures of 5.degree. C. or less so as to achieve superior separation of gas components.

The present invention is a bore-fed hollow fiber membrane device which possesses improved shellside countercurrent flow distribution. More specifically, the hollow fiber membrane bundle has a radial Peclet number of about 30 or lower which results in improved fluid recovery and productivity.

Boreside feed hollow fiber membrane device

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Lake Jackson, TX, United States of America

Thomas Caldwell Young