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The production method of aei type zeolite

A manufacturing method and zeolite technology, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve problems such as consumption, and achieve the effect of high productivity

Active Publication Date: 2021-07-20
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production method of Non-Patent Document 5, it is disclosed that it takes 7 days to obtain crystallization of AEI zeolite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] Pure water, sodium hydroxide, potassium hydroxide, FER type zeolite (SiO 2 / Al 2 o 3 Ratio = 24, H + type), and 1,1,3,5-tetramethylpiperidinium hydroxide (hereinafter also referred to as "TMPOH"), and AEI type zeolite (SiO 2 / Al 2 o 3 Ratio = 16, type H) were mixed to obtain a raw material composition having the following composition.

[0172] SiO 2 / Al 2 o 3 Ratio = 24

[0173] Na / SiO 2 Ratio = 0.05

[0174] K / SiO 2 Ratio = 0.05

[0175] (K+Na) / SiO 2 Ratio = 0.1

[0176] K / Na ratio = 1.0

[0177] TMPOH / SiO 2 Ratio = 0.2

[0178] h 2 O / SiO 2 Ratio = 10

[0179] OH / SiO 2 Ratio = 0.30

[0180] The content of the raw material zeolite in the raw material composition was 95% by weight, and the content of the seed crystal zeolite was 5% by weight.

[0181] The raw material composition was filled in an airtight container, and it crystallized at 170 degreeC for 48 hours, stirring this. The obtained crystal was separated into solid and liquid, washed with...

Embodiment 2

[0183] Pure water, sodium hydroxide, potassium hydroxide, FER type zeolite (SiO 2 / Al 2 o 3 Ratio = 17, H + type), TMPOH, and AEI type zeolite (SiO 2 / Al 2 o 3 ratio = 16, H type, average particle size 3.1 μm) and SiO 2 / Al 2 o 3 A crystalline product was obtained in the same manner as in Example 1, except that amorphous aluminum silicate with a ratio of 39 was mixed to obtain a raw material composition having the following composition.

[0184] SiO 2 / Al 2 o 3 Ratio = 26

[0185] Na / SiO 2 Ratio = 0.12

[0186] K / SiO 2 Ratio = 0.04

[0187] (K+Na) / SiO 2 Ratio = 0.16

[0188] K / Na ratio = 0.33

[0189] TMPOH / SiO 2 Ratio = 0.2

[0190] h 2 O / SiO 2 Ratio = 10

[0191] OH / SiO 2 Ratio = 0.36

[0192] The content of the raw material zeolite in the raw material composition was 36% by weight (35.7% by weight), and the content of the seed crystal zeolite was 5% by weight (4.8% by weight). In addition, the content of amorphous aluminum silicate was 60% by weigh...

Embodiment 3

[0194] SiO is used as raw material zeolite 2 / Al 2 o 3 Ratio=25 FER type zeolite (H + type), forming a raw material composition having the following composition, and setting the crystallization time to 72 hours, a crystallized product was obtained by the same method as in Example 1.

[0195] SiO 2 / Al 2 o 3 Ratio = 24

[0196] Na / SiO 2 Ratio = 0.12

[0197] K / SiO 2 Ratio = 0.04

[0198] (K+Na) / SiO 2 Ratio = 0.16

[0199] K / Na ratio = 0.33

[0200] TMPOH / SiO 2 Ratio = 0.2

[0201] h 2 O / SiO 2 Ratio = 13

[0202] OH / SiO 2 Ratio = 0.36

[0203] The content of the raw material zeolite in the raw material composition was 90% by weight, and the content of the seed crystal zeolite was 10% by weight. The obtained crystals are AEI type zeolite, its SiO 2 / Al 2 o 3 The ratio was 16 and the yield was 69%.

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Abstract

Provided: A method for producing AEI-type zeolite that does not use raw materials containing fluorine and phosphorus and does not use Y-type zeolite. A method for producing AEI zeolite, comprising a crystallization step of crystallizing a composition containing a structure-directing agent, a sodium source, water, and a silica-alumina source having any one or more of the following structures of zeolites.

Description

technical field [0001] The present invention relates to a method for producing AEI zeolite. Background technique [0002] AEI-type zeolite is a crystalline aluminum silicate studied as a catalyst for olefin production and a selective catalytic reduction catalyst (so-called SCR catalyst) (for example, Patent Document 1 and Non-Patent Document 1). So far, the following production methods using Y-type zeolite as a raw material have been reported as methods for producing AEI-type zeolite. [0003] Patent Document 1 discloses a method for producing AEI-type zeolite by crystallizing a raw material comprising Y-type zeolite, sodium silicate, and 1,1-diethyl-2,6-dimethylpiperidinium cation . The production method of Patent Document 1 discloses that it takes 5 to 7 days to obtain crystals of the AEI zeolite. [0004] Non-Patent Document 1 discloses a method for producing SSZ-39 by crystallizing a raw material containing sodium silicate, USY-type zeolite, and 1,1,3,5-tetramethylpip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/48
CPCC01B39/026C01B39/48B01J29/70B01J2229/16B01J2229/18B01J2229/62
Inventor 高光泰之石川智也吉光满明
Owner TOSOH CORP