Ecolab USA Inc.

Basf Corporation

Wenyong Lin

Francois Batllo

Shiby John

Ulrich Mueller

Ulrich Müller

Xinsheng Liu

Yulia Tataurova

George Salomon

Martin Dieterle

Ahmad Moini

Pascaline Tran

Ye Liu

Ivor Bull

Michael P Galligan

Tilman W Beutel

Michael Breen

John K Hochmuth

Barbara K Slawski

Saeed Alerasool

Keshavaraja Alive

Michael Romba

Jaya Lakshmi

Barbara Slawski

Ulrich Muller

Pascaline Harrison Tran

Alive Keshavaraja

Tilman Beutel

The present disclosure generally provides catalysts, catalyst articles and catalyst systems including such catalyst articles. In particular, the catalyst composition includes a metal ion-exchanged molecular sieve ion-exchanged with at least one additional metal, which reduces the number of metal centers often present in metal promoted zeolite catalysts. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems including a catalyst article coated with the catalyst composition. The catalyst article present in such emission treatment systems is useful to catalyze the reduction of nitrogen oxides in gas exhaust in the presence of a reductant while minimizing the amount of dinitrogen oxide emission.

Ion-exchanged molecular sieve catalysts exhibiting reduced N2O emissions

The invention provides methods and compositions for precursors and for the synthesis of zeolites. The invention makes use of intimately homogeneous precursors which avoid the formation of a difficult to work with gel stage in zeolite formation. This allows for the synthesis of zeolite in a much shorter period of time and with much lower amounts of structure directing agents.

Highly homogenous zeolite precursors

Catalyst articles comprising palladium and related methods of preparation and use are disclosed. Disclosed is a catalyst article comprising a first catalytic layer formed on a substrate, wherein the first catalytic layer comprises palladium impregnated on a ceria-free oxygen storage component and platinum impregnated on a refractory metal oxide, and a second catalytic layer formed on the first catalytic layer comprising platinum impregnated on an oxygen storage component and rhodium impregnated on a zirconia-coated or yttria-coated alumina. The palladium component of the catalyst article is present in a higher proportion relative to the other platinum group metal components. The catalyst articles provide improved reductions in NOx in exhaust gases, particularly after lean-rich aging.

Aging-resistant catalyst article for internal combustion engines

Disclosed are novel aqueous aluminum complex compositions and methods of making and using them. The novel compositions comprise very low halide content, even when made from aluminum chlorohydrate. The compositions find use in the production of zeolites, coatings, abrasives, binders, and refractories; and in the treatment of wastewater for example. The methods of making the novel compositions include passing a first aqueous aluminum complex composition through an anion exchange column or otherwise contacting the first composition with the anion exchange resin to provide a second aqueous aluminum complex composition that is different from the first aqueous aluminum complex composition. Also disclosed are methods of making zeolites and aqueous silica-alumina compositions from the novel aqueous aluminum complex compositions.

Polyaluminum salts and their uses in preparation of high-purity colloidal aluminum-silica composite particles and zeolites

Described herein are methods and compositions for zeolite synthesis. The methods and compositions involve modifying a colloidal silica sol with a metal compound and in the presence of a structure directing agent, followed by heating to form a zeolite. The methods and compositions result in rapid zeolite formation, even at reduced concentrations of structure directing agent.

Disclosed are processes for the preparation of copper containing molecular sieves with the CHA structure wherein the copper is exchanged into the Na-form of the Chabazite, using a liquid copper solution wherein the concentration of copper is in the range of about 0.001 to about 0.4 molar. Also described are copper containing molecular sieves with the CHA structure, catalysts incorporating molecular sieves, systems and methods for their use.

Process of direct copper exchange into Na+-form of chabazite molecular sieve, and catalysts, systems and methods

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Rolling Meadows, IL, United States of America

Wenyong Lin