Processfor preparing mordenite and beta zeolite mixed crystal material

A kind of technology of mordenite and beta zeolite, 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

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Problems solved by technology

[0012] So far there is no report on the method of synt

Method used

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  • Processfor preparing mordenite and beta zeolite mixed crystal material
  • Processfor preparing mordenite and beta zeolite mixed crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 1.0g mordenite seed crystal, 0.5g sodium fluoride, 23.6g 15% tetraethylammonium hydroxide solution and 15.9mL deionized water evenly, then add 0.7g sodium aluminate under mechanical stirring, stir until uniform, Add 15.7g of silica sol, continue to stir until uniform, then transfer to the reaction kettle, crystallize at 145°C for 5 days, cool rapidly after crystallization, filter and wash, and then put it in an oven to dry at 100-110°C for 3-4 hours , that is, mixed crystal raw powder, coded as A1.

Embodiment 2

[0040] Mix 2.0g mordenite seed crystals, 0.5g sodium fluoride, 23.6g 15% tetraethylammonium hydroxide solution and 15.9mL deionized water evenly, then add 0.7g sodium aluminate under mechanical stirring, stir until uniform, Add 15.7g of silica sol, continue to stir until uniform, then transfer to the reaction kettle, crystallize at 145°C for 5 days, cool rapidly after crystallization, filter and wash, and then put it in an oven to dry at 100-110°C for 3-4 hours , to obtain the mixed crystal raw powder, coded as A2.

Embodiment 3

[0042] Mix 3.0g mordenite seed crystals, 0.5g sodium fluoride, 23.6g 15% tetraethylammonium hydroxide solution and 15.9mL deionized water evenly, then add 0.7g sodium aluminate under mechanical stirring, stir until uniform, Add 15.7g of silica sol, continue to stir until uniform, then transfer to the reaction kettle, crystallize at 145°C for 5 days, cool rapidly after crystallization, filter and wash, and then put it in an oven to dry at 100-110°C for 3-4 hours , to obtain the mixed crystal raw powder, coded as A3.

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Abstract

The present invention discloses the preparation process of mixed crystal material of mordenite and beta zeolite, and features that mordenite is used as crystal seed added into synthesis reaction of beta zeolite and through further hydrothermal crystallization the mixed crystal material is prepared. The mixed crystal material thus synthesized has adjustable mixed crystal ratio and even higher catalyst performance than the mixed crystal material obtain through mechanical mixing of mordenite and beta zeolite.

Description

technical field [0001] The present invention relates to the preparation method of the mixed crystal material, more specifically, the present invention relates to the synthesis method of the mercerite / 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] Beta zeolite and mordenite are two widely used catalytic materials in oil refining and petrochemical industries, and they have many unique advantages and insurmountable disadvantages. For example, mordenite has...

Claims

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Application Information

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IPC IPC(8): B01J29/06C01B39/02C01B39/26
Inventor 宗保宁李凤艳赵天波张慧英
Owner CHINA PETROLEUM & CHEM CORP
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