Exxonmobil Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Nadya A Hrycenko

Ivy Dawn Johnson

Jean Willem Beeckman

Peter I Ravikovitch

Randolph John Smiley

Tilman W Beutel

Natalie Ann Fassbender

Harry William Deckman

Karl Gottlieb Strohmaier

Machteld Maria Mertens

Terry Eugene Helton

Wieslaw J Roth

Simon Christopher Weston

Jack Wayne Johnson

Hilda B Vroman

Brita Engels

Barbara Carstensen

Theodore E Datz

William W Lonergan

Keith C Gallow

Machteld Maria Wilfried Mertens

The present invention provides an improved method for making molecular sieves having MWW framework structure using precipitated aluminosilicates (PAS), and the use of molecular sieves so made in processes for catalytic conversion of hydrocarbon compounds.

Synthesis of molecular sieves having MWW framework structure

A molecular sieve material, EMM-17, has in its as-calcined form, a total surface area of greater than 550 m/g and/or an external surface area of greater than about 100 m/g as measured by the BET Method, and a specific X-ray diffraction pattern.

Small crystal EMM-17, its method of making and use

A composition is described comprising a molecular sieve having pores defined by channels formed by one or more 8-membered rings of tetrahedrally coordinated atoms, such as a DDR-type molecular sieve, and an amorphous deposit of a boron compound on the molecular sieve.

Boron selectivated molecular sieves and their use in sorptive separations

Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Steaming the H-form DDR framework type crystals at a temperature from 426&#xb1;&#xb0; C. to 1100&#xb1;&#xb0; C. for a time period from about 30 minutes to about 48 hours can attain one or more of the following properties: a CH4 diffusivity of no more than 95% of the CH4 diffusivity of the unsteamed H-form DDR framework type crystals; an N2 BET surface area from 85% to 110% of the surface area of unsteamed H-form DDR framework type crystals; and an equilibrium CO2 sorption capacity from 80% to 105% of the equilibrium CO2 sorption capacity of unsteamed H-form DDR framework type crystals.

Synthesis of ZSM-58 crystals with improved diffusivity for use in gas separations

The present invention provides an improved method for manufacturing high quality porous crystalline MCM-56 material. It also relates to the MCM-56 material manufactured by the improved method, catalyst compositions comprising same and use thereof in a process for catalytic conversion of hydrocarbon compounds. One such conversion process involves production of monoalkylated aromatic compounds, particularly ethylbenzene and cumene, by the liquid or partial liquid phase alkylation of alkylatable aromatic compound, particularly benzene.

MCM-56 manufacture

Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Additionally, by controlling the ratio of water content to silica content in the synthesis mixture, it has unexpectedly been found that ZSM-58 crystals can be formed with an improved morphology. The improved morphology can result in ZSM-58 crystals with a more uniform size across the various dimensions of the crystal, which allows for more uniform diffusion within the crystal. This is in contrast to conventionally synthesized crystals, where the size of the crystal can vary along different axes of the crystals.

Synthesis of ZSM-58 crystals with improved morphology

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Clinton, NJ, United States of America

Nadya A Hrycenko