Title: Pore opened zeolite nanosheets and their suspensions and methods and uses related thereto

Abstract

Methods for forming two-dimensional (2D) zeolite nanosheets include exposing a multi-lamellar (ML) zeolite material including an organic structure directing agent (OSDA) to a mixture including sulfuric acid and hydrogen peroxide under conditions sufficient to remove substantially all of the OSDA from the ML zeolite material; and after exposing the ML zeolite material, treating a solution containing the ML zeolite material to sonication and/or mixing under conditions sufficient to substantially exfoliate layers of the ML zeolite to obtain porous two-dimensional zeolite nanosheets that are substantially free of the OSDA. In some cases, without further treatment such as secondary growth of the zeolite coating layer, a deposit of the OSDA-free nanosheets on polymer support exhibits hydrocarbon isomer selectivity.

Inventors:

Tsapatsis, Michael; Xiao, Qiang; Zhang, Han

Issue Date:

2019-02-26

Research Org.:

Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1525008

Patent Number(s):

10213748

Application Number:

15/386,217

Assignee:

Regents of the University of Minnesota (Minneapolis, MN)

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

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

B01D2256/24 - Hydrocarbons
B01D2257/7022 - Aliphatic hydrocarbons
B01D53/228 - {characterised by specific membranes}
B01D67/0039 - {Inorganic membrane formation}
B01D67/0051 - {by controlled crystallisation, e,.g. hydrothermal growth}
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

B01J2229/10 - After treatment, characterised by the effect to be obtained
B01J2229/22 - to destroy the molecular sieve structure or part thereof
B01J2229/30 - After treatment, characterised by the means used
B01J2229/37 - Acid treatment
B01J29/06 - Crystalline aluminosilicate zeolites
B01J29/40 - of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
B01J29/70 - of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
B01J29/7038 - {MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25}
B01J35/0006 - {Catalysts containing parts with different compositions}
B01J35/023 - {Catalysts characterised by dimensions, e.g. grain size}
B01J35/065 - {Membranes}
B01J35/10 - characterised by their surface properties or porosity
B01J37/0246 - {Coatings comprising a zeolite}
B01J37/04 - Mixing {
B01J37/12 - Oxidising
B01J37/343 - {of ultrasonic wave energy}

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

C01B39/026 - {After-treatment}
C01B39/48 - using at least one organic template directing agent

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DOE Contract Number:  

AR0000338

Resource Type:

Patent

Resource Relation:

Patent File Date: 2016-12-21

Country of Publication:

United States

Language:

English