Pq Corporation

Chevron U.s.a. Inc.

University of Iowa Research Foundation

Ecovyst Catalyst Technologies LLC

Anton Petushkov

Hong-Xin Li

Tracy Margaret Davis

Bjorn Moden

William Edward Cormier

Sarah Larsen

Lifeng Wang

William E Cormier

A microporous crystalline material having a molar silica to alumina ratio (SAR) ranging from 10 to 15 and a fraction of Al in the zeolite framework of 0.63 or greater is disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed. Further, a method of making the disclosed microporous crystalline material is disclosed.

Low-silica chabazite zeolites with high acidity

An as-synthesized microporous material having a CHA structure and containing at least one organic structure directing agent that has the following general structure of the quaternary ammonium cation is disclosed: A microporous crystalline material made from the as-synthesized material is also disclosed. A method of making microporous crystalline material using one or more organic structure directing agents is also disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed.

Chabazite zeolite synthesis with organic templates

There is disclosed a highly crystalline, small crystal, ferrierite zeolite prepared from a gel containing a source of silica, alumina, alkali metal and a combination of two templating agents. The resulting material includes ferrierite crystals having a particle size of about or less than about 200 nm. The desired crystal size can be achieved by using a specific composition of the gel. The purity of the material and the crystal size was determined by using X-ray powder diffraction and scanning electron microscopy. The material has excellent surface area and micropore volume as determined by nitrogen adsorption.

Small crystal ferrierite and method of making the same

A one step synthesis of nanocrystalline zeolites ZSM-5 and Na&#x3b2; from a single template system in high yield has been discovered. The size of individual nanocrystals, as well as mesopore surface area and pore volume can be controlled by adjusting the pH of the reaction mixture, as well as the hydrothermal treatment temperature and duration. The mesopore volume and size distribution show a dependence on particle size such that smaller particles lead to higher mesopore volumes and narrower pore size distributions.

Synthesis of hierarchical nanocrystalline zeolites with controlled particle size and mesoporosity

The present invention is directing to a method for making a germanosilicate SSZ-75 molecular sieve using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure directing agent.

Method for making germanosilicate SSZ-75

The present invention relates to new germanosilicate SSZ-75 molecular sieve, and methods for synthesizing germanosilicate SSZ-75.

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Lafayette Hill, PA, United States of America

Anton Petushkov