Exxonmobil Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Frank Lai

Harry William Deckman

John Scott Buchanan

Jose G Santiesteban

Hye-Kyung Cho Timken

David Lawrence Stern

Allan J Jacobson

Edward William Corcoran, Jr

William Alois Weber

Antonie Jan Bons

Robert A Crane

James Alexander McHenry

Ronald Joseph Cimini

Lothar Ruediger Czarnetzki

Jannetje Maatje Van Den Berge, Legal Representative

David Anthony Stachelczyk

Klaas Keizer

Anthonie Jan Burggraaf

Richard B Saunders

Kathy Saunders, Legal Representative

Zeger Alexander Eduard Pieter Vroon

Wilfred Jozef Mortier

A porous, crystalline material is described having the framework structure of ZSM-12 and a composition involving the molar relationship:XO:()YOwherein X is a trivalent element, Y is a tetravalent element and n is less than about 45, e.g., less than about 40, wherein the average crystal size of the material is less than about 0.1 micron, which material is substantially free of impurities. The material is made by: (a) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), hydroxyl (OH) ions, water, and an organic monoquaternary ammonium cation directing agent (R) and an organic diquaternary ammonium structure blocking agent (R'); (b) maintaining the mixture under sufficient conditions until crystals of said material are formed; and (c) recovering the crystalline material from step (ii). The material can be used as a hydrocarbon conversion process catalyst.

High activity small crystal ZSM-12

In a process for converting C+ aromatic hydrocarbons to lighter aromatic products a feed comprising C+ aromatic hydrocarbons is contacted under transalkylation reaction conditions with a catalyst composition comprising (i) a first molecular sieve selected from the group consisting of ZSM-12, mordenite and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including d-spacing maxima at 12.4&#xb1;0.25, 6.9&#xb1;0.15, 3.57&#xb1;0.07 and 3.42&#xb1;0.07; and (ii) a second molecular sieve having a constraint index ranging from 3 to 12. At least the first molecular sieve has a hydrogenation component associated therewith and the first and second molecular sieves are contained in the same catalyst bed. The C+ aromatic hydrocarbons are converted under the transalkylation reaction conditions to a reaction product containing xylene.

Heavy aromatics processing

Layers comprising a molecular sieve layer on a porous or non-porous support, having uniform properties and allowing high flux are prepared from colloidal solutions of zeolite or other molecular sieve precursors (particle size less than 100 nm), by deposition, e.g., by spin or dip-coating, or by in situ crystallization.

Molecular sieve layers and processes for their manufacture

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Bridgewater, NJ, United States of America

Frank Lai