# US 2013/0156689 A1 · Method for producing mtw-type zeolite

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- Number: US 2013/0156689 A1
- Document ID: US20130156689A1
- Status: Published application
- Kind: A1
- Application number: 13/509,677
- Filed: 2010-11-19
- Published: 2013-06-20
- Earliest claimed: 2009-11-20
- Assignees: The University of Tokyo; Nippon Chemical Industrial Co., Ltd.
- Inventors: Keiji Itabashi; Tatsuya Okubo; Kenta Iyoki
- Web page: https://patentgrep.com/patent/US20130156689A1

## CPC

- C01B 39/42: Type ZSM-12
- B01J 20/3078: {Thermal treatment, e.g. calcining or pyrolizing}
- B01J 29/7034: {MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3}
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The method for producing an MTW-type zeolite according to the present invention includes: mixing a silica source, an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture having a composition represented by specific molar ratios; (2) adding an MTW-type zeolite which has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound, as a seed crystal, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture; and (3) airtightly heating the reaction mixture, to which the seed crystal has been added, at 100 to 200° C.

## Claims

### Claim 1

A method for producing an MTW-type zeolite, comprising:
(1) mixing a silica source, an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture having a composition represented by the following molar ratios:
SiO2/Al2O3=12 to 200
Na2O/SiO2=0.1 to 0.3
Li2O/(Na2O+Li2O)=0.05 to 0.5
H2O/SiO2=10 to 50;
(2) adding an MTW-type zeolite which has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound, as a seed crystal, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture; and
(3) airtightly heating the reaction mixture, to which the seed crystal has been added, at 100 to 200° C.

### Claim 2 (depends on 1)

The production method according to claim 1, wherein a beta-type zeolite produced by the production method according to claim 1 is used as a seed crystal.