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Method for preparing ZSM-5 and beta zeolite mixed crystal material

A technology of ZSM-5 and zeolite beta, which is applied in the field of preparation of mixed crystal materials

Active Publication Date: 2005-08-03
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] So far there is no report about the preparation method of ZSM-5 and zeolite beta mixed crystal material

Method used

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  • Method for preparing ZSM-5 and beta zeolite mixed crystal material
  • Method for preparing ZSM-5 and beta zeolite mixed crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 1.0g ZSM-5 seed crystal, 0.6g sodium fluoride, 29.5g tetraethylammonium hydroxide solution, 2.2g sulfuric acid solution and 13.5mL deionized water, and then add 0.5g sodium aluminate under mechanical stirring, Stir until uniform, then add 19.7g of silica sol, continue to stir evenly, then move into the reaction kettle, crystallize at 140°C for 6 days, cool rapidly after crystallization, filter and wash, and then put it in an oven to dry at 100-110°C for 3 After ~4 hours, the mixed crystal raw powder is obtained, code A1.

Embodiment 2

[0040] Mix 2.0g ZSM-5 seed crystal, 0.6g sodium fluoride, 29.5g tetraethylammonium hydroxide solution, 2.2g 20% ​​sulfuric acid solution and 13.5mL deionized water, then add 0.5g sodium aluminate under mechanical stirring , stir until uniform, add 19.7g of silica sol, continue to stir until uniform, then move into the reaction kettle, crystallize at 140°C for 6 days, cool rapidly after crystallization, filter and wash, and then put it in an oven at 100-110°C Dry for 3 to 4 hours to obtain the mixed crystal raw powder, code A2.

Embodiment 3

[0042] Mix 3.0g ZSM-5 seed crystal, 0.6g sodium fluoride, 29.5g 15% tetraethylammonium hydroxide solution, 2.2g 20% ​​sulfuric acid solution and 13.5mL deionized water, then add 0.5g Sodium aluminate, stir until uniform, add 19.7g of silica sol, continue to stir until uniform, then move into the reaction kettle, crystallize at 140°C for 6 days, cool rapidly after crystallization, filter and wash, and then put it into the oven at 100 Dry at ~110°C for 3 to 4 hours to obtain mixed crystal raw powder, code A3.

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Abstract

The present invention discloses the preparation process of mixed crystal material of ZSM-5 zeolite and beta-zeolite, and features that ZSM-5 molecular sieve is used as crystal seed is added into synthesized mixture of beta-zeolite to produce the mixed crystal material of ZSM-5 zeolite and beta-zeolite through further hydrothermal crystallization. The mixed crystal material thus produced has adjustable mixed crystal ratio and catalytic performance higher than that of mixed crystal material obtained through mechanical mixing of ZSM-5 zeolite and beta-zeolite.

Description

technical field [0001] The present invention relates to a preparation method of a mixed crystal material, more specifically, the present invention relates to a preparation method of a ZSM-5 and beta zeolite mixed crystal material. Background technique [0002] With the continuous improvement of the quality requirements of chemical products, higher requirements are put forward for the catalytic performance of zeolite catalytic materials. People's exploration of single-structure zeolites has reached a certain depth. In order to improve the performance of zeolite catalytic materials and make them more suitable for industrial applications, it is a new way to explore mixed-crystal catalytic materials with multiple structure types. [0003] In oil refining and petrochemical industry, β zeolite and ZSM-5 are two kinds of catalytic materials widely used, and they have many unique advantages and insurmountable disadvantages. For example, the special pore s...

Claims

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Application Information

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IPC IPC(8): B01J29/80C01B39/38C01B39/48
Inventor 宗保宁李凤艳赵天波张慧英
Owner CHINA PETROLEUM & CHEM CORP
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