Title: Synthesis of an un-supported, high-flow ZSM-22 zeolite membrane

Abstract

Novel methods for synthesizing wholly un-supported, high-flow catalytic membranes consisting of 100% crystalline ZSM-22 crystals with no binder phase, having sufficient porosity to allow high Weight Hourly Space Velocities of feedstock to pass through without generating back pressure. The ZSM-22 membranes perform favorably to existing bulk ZSM-22 catalysts (e.g., via 1-butene conversion and selectivity). The method of membrane synthesis, based on Vapor Phase Transport, allows free-standing, binder-less membranes to be fabricated in varied geometries and sizes so that membranes can be tailor-made for particular geometries applications. The ZSM-22 precursor gel may be consolidated into a semi-cohesive body prior to vapor phase crystallization, for example, by uniaxial pressing. These crystalline membranes may be modified by ion exchange, pore ion exchange, framework exchange, synthesis modification techniques to incorporate other elements into the framework, such as K, H, Mg, Zn, V, Ga, and Pt.

Inventors:

Thoma, Steven G ^[1]; Nenoff, Tina M ^[1]

---

+ Show Inventor Affiliations

1. Albuquerque, NM

Issue Date:

Tue Oct 10 00:00:00 EDT 2006

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

908239

Patent Number(s):

7119245

Application Number:

10/280,252

Assignee:

Sandia Corporation (Albuquerque, NM)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

Show more

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2323/08 - Specific temperatures applied
B01D2323/10 - Specific pressure applied
B01D2323/12 - Specific ratios of components used
B01D2325/10 - Catalysts being present on the surface of the membrane or in the pores
B01D67/0046 - {by slurry techniques, e.g. die or slip-casting}
B01D67/0051 - {by controlled crystallisation, e,.g. hydrothermal growth}
B01D67/0076 - {Pretreatment of inorganic membrane material prior to membrane formation, e.g. coating of metal powder}
B01D67/0093 - {Chemical modification}
B01D71/028 - {Molecular sieves, e.g. zeolites, silicalite

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J2229/183 - in framework positions
B01J29/7042 - {TON-type, e.g. Theta-1, ISI-1, KZ-2, NU-10 or ZSM-22}
B01J35/065 - {Membranes}
B01J37/0009 - {Use of binding agents

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B39/48 - using at least one organic template directing agent

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C11/09 - Isobutene
C07C2529/70 - of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65
C07C5/2708 - {with crystalline alumino-silicates, e.g. molecular sieves}

Show less

DOE Contract Number:  

AC04-94AL85000

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE