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High-mesopore-amount Y type zeolite and preparation method thereof

A high mesoporous, zeolite technology, applied in the direction of crystalline aluminosilicate zeolite, faujahedral crystalline aluminosilicate zeolite, etc., can solve the problems of loss of Y-type zeolite acid content, not many applications, etc., and achieves moderate experimental conditions and preparation. Simple, low cost of raw materials

Active Publication Date: 2018-03-06
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acidity of Y-type zeolite is directly related to the aluminum content of the skeleton, and the acidity of Y-type zeolite is bound to be lost when dealumination creates mesopores.
[0005] The alkali treatment desiliconization technology developed in recent decades is also an effective method for creating mesoporous pores, but this method has certain requirements for the silicon-aluminum ratio of the sample, and the suitable silicon-aluminum molar ratio is 50-100, so the There are not many applications of Y-type zeolite with low ratio

Method used

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  • High-mesopore-amount Y type zeolite and preparation method thereof
  • High-mesopore-amount Y type zeolite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides a Y-type zeolite with high mesoporous content, which is prepared through the following steps:

[0038]100g of small-grained NaY zeolite (grain size 200-300nm) with a skeleton silicon-aluminum ratio of 4.8 was exchanged with 100g of ammonium chloride and 1000g of water at 90°C for 1 hour for ammonium ion exchange, then fully washed, dried overnight at 120°C, and after drying The sample was raised to 500°C at a rate of 4°C / min in a muffle furnace, and kept for 4h for roasting treatment; after that, the same ammonium ion exchange as above was performed to obtain a small-grained NH with an exchange degree of more than 80%. 4 Y zeolite.

[0039] Stir and dissolve 8.58g of ammonium oxalate and 200g of water in a 65°C water bath to prepare a buffer solution with a concentration of 0.3M; 4 Add the Y zeolite to the prepared ammonium oxalate buffer solution and beat at 65°C to obtain a slurry.

[0040] Stir and dissolve 4.25g ammonium fluorosilicate and...

Embodiment 2

[0045] The method described in Example 1 was used to prepare Y-type zeolite with high mesoporous volume and small crystal grains, except that the dealumination and silicon supplementation step was only performed once, and the relevant test and characterization results are shown in Table 1.

Embodiment 3

[0047] The method described in Example 1 was used to prepare Y-type zeolite with high mesoporous content and small crystal grains, except that the silicon-alumina ratio of the initial small grain NaY zeolite was 4.2, and the relevant test and characterization results are shown in Table 1.

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Abstract

The invention provides a preparation method of high-mesopore-amount Y type zeolite. The preparation method comprises: carrying out ammonium ion exchange treatment on Y type zeolite at a temperature of50-120 DEG C to obtain NH4Y zeolite; adding the NH4Y zeolite to a buffer solution with a concentration of 0.1-1 M, and beating to a slurry; slowly adding an ammonium fluorosilicate solution with a concentration of 0.01-1 M to the slurry in a dropwise manner, and stirring for 0.1-5 h at a temperature of 20-120 DEG C to obtain a crude product; directly carrying out alkali treatment on the crude product or carrying out alkali treatment after washing and drying, wherein the crude product is treated for 0.1-5 h at a temperature of 30-120 DEG C with an alkaline solution with a concentration of 0.01-3.0 M, and a mass ratio of the alkaline solution to the crude product is 1-50:1, preferably 5-40:1; and carrying out ammonium ion exchange on the obtained crude product at a temperature of 50-120 DEGC, calcining for 1-8 h at a temperature of 300-800 DEG C, washing, and drying to obtain the high-mesopore-amount Y type zeolite.

Description

technical field [0001] The invention relates to a zeolite molecular sieve and a preparation method thereof, in particular to a Y-type zeolite with high mesoporous content and a preparation method thereof, belonging to the technical field of zeolite molecular sieve preparation. Background technique [0002] Y-type zeolite has regular three-dimensional pore arrangement, high specific surface area and strong acidity, and has been widely used in petroleum and petrochemical industries, among which the usage rate in catalytic cracking process is over 70%. However, due to the decline in the quality of crude oil, heavy oil accounts for an increasing proportion of available crude oil, and its utilization and conversion have attracted more and more attention. However, the pore size of the microporous Y-type zeolite is only 0.74nm. In the catalytic reaction involving macromolecules, the reaction substrate is difficult to contact the catalytic active center and the mass transfer of mate...

Claims

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Application Information

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IPC IPC(8): C01B39/24
CPCC01B39/24C01P2006/12C01P2006/14C01P2006/16
Inventor 申宝剑李程袁德林王闻年金文龙李磊康春燕郑庆庆米硕孙厚祥余倩倩郭巧霞韩华军申宝华申波俊
Owner BC P INC CHINA NAT PETROLEUM CORP
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