Renewable microporous-mesoporous composite adsorbent and its preparation method and application

A technology of composite materials and adsorbents, applied in chemical instruments and methods, adsorption purification/separation, ethylene production, etc., can solve the problems of pending development, undeveloped research, low preparation efficiency of mesoporous-microporous zeolite materials, etc., to achieve Long service life, low adsorption heat effect, and shortened synthesis time

Active Publication Date: 2018-12-11
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation efficiency of this mesoporous-microporous zeolite material is relatively low, and the produced mesoporous area still needs to be improved.
[0008] At present, the preparation technology of microporous-mesoporous materials is mainly used in the preparation of microporous-mesoporous composite molecular sieves, and the method of combining mesoporous alumina with microporous molecular sieves to prepare microporous molecular sieve-mesoporous alumina composite materials no research yet
At the same time, the use of ultrasonic-microwave technology to improve the preparation efficiency of microporous-mesoporous composite materials and the expansion of the prepared microporous-mesoporous composite materials to the removal of oxygen-containing compounds in olefins are still to be developed.

Method used

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  • Renewable microporous-mesoporous composite adsorbent and its preparation method and application
  • Renewable microporous-mesoporous composite adsorbent and its preparation method and application
  • Renewable microporous-mesoporous composite adsorbent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Mix 2 parts of sodium hydroxide, 1 part of alumina, and 10 parts of water to prepare sodium aluminate, then add 0.01 part of cetyltrimethylammonium bromide, and stir and mix for 4 hours. Add 50 parts of water and 1 part of aluminum nitrate solution, stir at 25°C for 12 hours, and age at room temperature for 24 hours to obtain solution A; weigh 1.5 parts of FAU molecular sieve, add 10 parts of 2.5mol / L sodium hydroxide The solution was ultrasonically treated for 30 minutes to obtain solution B; solution A and solution B were mixed at room temperature, and microwave crystallized at 90°C for 50 minutes, washed and dried to obtain product M1.

Embodiment 2

[0053] The difference from Example 1 is that the solid FAU secondary unit B of the treated FAU molecular sieve is obtained by drying the FAU molecular sieve after ultrasonic treatment with alkali. Then solutions A and B were mixed at room temperature, and microwave crystallized at 90° C. for 50 min, washed and dried to obtain product M2.

Embodiment 3

[0055] Mix 3 parts of sodium aluminate, 100 parts of water, and 0.1 part of P123 template at room temperature for 6 hours, then add 1 part of aluminum nitrate and 177 parts of water, and stir for 12 hours at room temperature to obtain solution A; weigh 1 part of FAU type molecular sieve, add 10 parts of 3.0mol / L NaOH solution, ultrasonic treatment for 10min, then add 10 parts of isopropanol, and treat it under ultrasonic for 20min to obtain solution B; mix solution A and solution B, and stir at room temperature for 12h , followed by microwave crystallization at 95° C. for 60 min, centrifugation, washing and drying to obtain the product M3.

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Abstract

The invention relates to a renewable microporous-mesoporous composite material adsorbent, a preparing method thereof and applications of the adsorbent. The method includes steps of firstly preparing a modified FAU molecular sieve secondary unit; preparing a mesoporous gel mixture; mixing the modified FAU molecular sieve secondary unit with the mesoporous gel mixture; then performing microwave crystallization at 60-120 DEG C; washing, centrifuging and drying the mixture; then performing thermal oxidation treatment to remove a demolding agent, namely to prepare a recoverable microporous-mesoporous composite material; and preparing the composite material into the adsorbent having a certain particle size distribution through tabletting molding or extrusion molding or ball rolling molding. Compared with the prior art, the composite material adsorbent has characteristics of a high synthesis speed, low energy consumption, and the like. Compared with alcohol ether adsorbents at present, the composite material adsorbent is high in impurity adsorption depth, high adsorption capacity, and low in heat effect and has good physical and chemical properties.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a reproducible microporous-mesoporous composite material adsorbent and a preparation method and application thereof. Background technique [0002] Olefins are an important basic raw material for the development of the national economy. Due to differences in raw materials and production processes, the main impurities produced during the production of olefins by the MTO process are oxygen-containing compounds. The existence of trace oxygen-containing compounds in olefins will destroy the active center of olefin polymerization catalysts or participate in polymerization reactions, reduce the orientation ability of catalysts or form random active chains, reduce the activity, selectivity and yield of high-efficiency catalysts. The density, viscosity, molecular weight, crosslinking degree, isotacticity and other properties of the substance will be affected. [0003] Based on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C07C7/13C07C11/04C07C11/06
CPCB01J20/0248B01J20/18B01J20/28054B01J2220/4806C07C7/13C07C11/06C07C11/04Y02P30/40
Inventor 徐华胜夏思奇王鹏飞胡杰张佳何秋平朱琳
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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