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Straight-through mesoporous Fau molecular sieve and preparation method thereof

A technology of mesoporous molecular sieve and molecular sieve, which is applied in the field of straight-through mesoporous FAU molecular sieve and its preparation, which can solve the problems of poor straight-through, low crystallinity and high cost of mesoporous FAU molecular sieve

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problems of high cost, low crystallinity and poor straight-through property of the obtained mesoporous FAU molecular sieve in the prior art, and a new preparation method of straight-through mesoporous FAU molecular sieve is provided

Method used

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  • Straight-through mesoporous Fau molecular sieve and preparation method thereof
  • Straight-through mesoporous Fau molecular sieve and preparation method thereof
  • Straight-through mesoporous Fau molecular sieve and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation of straight-through mesoporous FAU molecular sieves is carried out in the following steps: first prepare FAU water-in-oil microemulsion, the aqueous solution of sodium hydroxide and tri-n-octylamine is the microemulsion water phase, tetraethyl orthosilicate (TEOS) and isopropanol The toluene solution of aluminum is the oil phase, and the clear microemulsion I is obtained by mixing the two phases of water and oil. The molar ratio of Si:Al:NaOH or TPABr in microemulsion I is 10:1:10; the molar ratio of toluene to trin-octylamine to water is 2:1:1; Precursor II was obtained by impregnating SBA-15 at a mass ratio of 0.3:1. After aging at 60°C for 6 hours, the precursor II was put into a stainless steel reactor, and crystallized at 110°C for 24 hours to obtain a mesoporous FAU molecular sieve containing a template. After the product was taken out, it was calcined at 550°C for 6 hours to obtain a straight-through mesoporous FAU molecular sieve.

[0033] The ...

Embodiment 2-3

[0035] According to the method of Example 1, only by changing the type of mesoporous molecular sieve, the mesopore and micropore distribution of the straight-through mesoporous FAU molecular sieve can be adjusted to obtain straight-through mesoporous FAU molecular sieves with different mesopore / micropore pore ratios.

[0036] The mesoporous MCM series can be synthesized by conventional technical means in the field.

Embodiment 4

[0038] According to the method of embodiment 1, just change surfactant.

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Abstract

The invention relates to straight-through mesoporous FAU molecular sieves and a preparation method therefor. The method is mainly used for solving the problems in the prior art that during the preparation of FAU molecular sieves with mesopores, microporous-mesoporous pore passages cannot communicate with each other completely, mesoporous pore passages are prone to collapse, and the like. The method comprises the steps of dipping mesoporous molecular sieves with a microemulsion rich in silicon / aluminum / FAU template agent by adopting a secondary treatment method, growing the FAU molecular sieveson internal surfaces of the mesoporous molecular sieves through epitaxial growth, and then, producing the straight-through mesoporous FAU molecular sieves. According to the method, the problems mentioned above are perfectly solved, and the method can be applied to industrial production for preparing a variety of straight-through mesoporous molecular sieves.

Description

technical field [0001] The invention relates to a straight-through mesoporous FAU molecular sieve and a preparation method thereof. Background technique [0002] FAU structure molecular sieves belong to the series of microporous molecular sieves, which belong to the category of octahedral stones, including X-type and Y-type with low silicon-aluminum ratio. Its skeleton is mainly composed of aluminosilicate, with a secondary structure of double six-membered rings and β cages, and the β cages are connected by double six-membered rings to form a three-dimensional hollow skeleton structure. Y-type with high silicon-aluminum ratio has high selectivity, high hydrothermal stability, and suitable acidity. In the 1960s, it was first used for catalytic cracking by Linde Company, and it showed excellent catalytic cracking performance in the subsequent FCC reaction, and then it was widely used in various industrial enterprises. FAU molecular sieves are prepared by crystallization at 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
CPCC01B39/04C01P2002/72C01P2006/12C01P2006/16
Inventor 唐康健滕加伟朱俊华
Owner CHINA PETROLEUM & CHEM CORP