High surface area mesoporous-micropore composite BETA zeolite and preparation method thereof

A technology with high specific surface area and specific surface area, which is applied in the field of zeolite materials, can solve the problems of reducing the synthesis cost of BETA zeolite, narrow synthesis phase zone, and low silicon-aluminum ratio of the product, so as to achieve controllable particle size, simple process and low cost Effect

Inactive Publication Date: 2013-10-16
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not use any organic template, which can greatly reduce the synthesis cost of BETA zeolite, but the synthesis phase area is narrow, and the product has a low silicon-aluminum ratio, making it difficult to mediate in a large scale

Method used

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  • High surface area mesoporous-micropore composite BETA zeolite and preparation method thereof
  • High surface area mesoporous-micropore composite BETA zeolite and preparation method thereof
  • High surface area mesoporous-micropore composite BETA zeolite and preparation method thereof

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Embodiment Construction

[0033] Further describe the present invention by embodiment below:

[0034] 1. Raw material ratio (see table below)

[0035] Numbering raw material Raw material / SiO 2 1 Silicon source: white carbon black, silica gel, water glass, silica sol, tetraethyl orthosilicate 1 2 Aluminum source: aluminum sulfate, aluminum nitrate, aluminum hydroxide 0~0.023 3 Alkali: Sodium Hydroxide 0.22~0.42 4 Organic template agent (TEAOH) 0.08~0.4 5 water 9.4 6 BETA zeolite seed 0~0.1

[0036] 2. Synthetic steps

[0037] With ingredients ratio 1SiO 2 :0.023Al 2 o 3 :0.42NaOH:0.1TEAOH:9.4H 2 O Seed / SiO 2 =10wt%; the silicon source is white carbon black; the aluminum source is aluminum sulfate octadecahydrate as an example.

[0038] (1) Weigh Al 2 (SO 4 ) 3 18H 2 O 1.532g, NaOH 1.68g, 25%TEAOH 5.888g were poured into a plastic cup.

[0039] (2) Weigh H2 O 12.462g in a plastic cup, stir with a plastic stirring rod to make Al 2 (S...

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Abstract

The invention belongs to the technical field of zeolite materials and particularly discloses a high surface area mesoporous-micropore composite BETA zeolite and a preparation method thereof. According to the invention, less BETA zeolite is a seed crystal, a silica source, an aluminium source, water, an organic template and the like are added for making wet gel, then the wet gel is dried to obtain dry gel, the dry gel is crystallized in water vapor with a certain temperature and pressure, and then the high surface area mesoporous-micropore composite BETA zeolite is prepared through removing the organic template at a high temperature.

Description

technical field [0001] The invention belongs to the technical field of zeolite materials, and in particular relates to a high specific surface mesoporous-microporous composite BETA zeolite and a preparation method thereof. Background technique [0002] BETA zeolite belongs to the BEA structure type and has three-dimensional twelve-membered ring large pores. Compared with Y-type zeolite (FAU), BETA zeolite has a wide range of adjustable silicon-aluminum ratio, and its thermal stability and hydrothermal stability are higher than Y-type zeolite. The pore size of BETA zeolite is larger than that of ZSM-5 (MFI), which not only facilitates the diffusion of reactants and product molecules, so that it has high catalytic stability, but also has good selectivity for certain product molecules. Because BETA zeolite has many unique properties, it is widely used in alkylation reaction, alkyl isomerization reaction, transalkylation reaction, hydrocarbon cracking reaction and so on. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 华涛程晓维龙英才唐颐陈晋阳
Owner FUDAN UNIV
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