A kind of preparation method of hierarchical porous zsm-5/zsm-11 eutectic zeolite molecular sieve

A technology of ZSM-11 and ZSM-5, which is applied in the field of catalyst preparation, achieves the effects of simple process, easy operation and realization, and environmental friendliness
CN107619054BActive Publication Date: 2019-12-10CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-12-10

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Abstract

The invention relates to a preparation method of a hierarchical pore ZSM-5 / ZSM-11 eutectic zeolite molecular sieve, mainly solves the problems that in the mode of preparing the hierarchical pore ZSM-5 / ZSM-11 eutectic zeolite molecular sieve by using double template agents or adding seed crystal, steps are tedious, and the price is high, and belongs to the technical field of preparation of inorganic materials. The preparation method comprises the following steps: preparing an aluminum source, a silicon source, an organic template, sodium hydroxide and potassium hydroxide into a raw material mixture; fully stirring the raw material mixture into gel and then transferring the gel into a high-temperature kettle for hydrothermal crystallization; and after washing and filtering, carrying out acid-alkali treatment modification so as to obtain the hierarchical pore ZSM-5 / ZSM-11 eutectic zeolite molecular sieve finally. The preparation method is simple and convenient in process, easy to operateand implement and low in cost, and is environmentally friendly.
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Description

technical field

[0001] The invention belongs to the field of catalyst preparation, and in particular relates to a preparation method of a multi-stage porous ZSM-5 / ZSM-11 eutectic zeolite molecular sieve. Background technique

[0002] ZSM-5 molecular sieve is widely used in oil refining industry, environmental protection and fine chemical industry because of its wide range of silicon-aluminum ratio, high hydrothermal stability, high specific surface area and high catalytic performance. ZSM-5 molecular sieve belongs to the orthorhombic crystal system, and there are two kinds of pore systems in its skeleton, which are the ten-membered ring straight cylindrical channel with an elliptical cross-section parallel to the y-axis (the channel size is 0.54nm×0.56nm) and the channel parallel to the y-axis. The cross-section of the x-axis is approximately a circular Z-shaped channel (the size of the channel is 0.52nm×0.58nm), and the two kinds of channels cross each other, and the size o...

Claims

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