Modified montmorillonite catalyst, preparation and application thereof

A technology of montmorillonite and catalyst, which is applied in the field of modified montmorillonite catalyst and its preparation and application, and can solve the problems of complicated preparation method, many operation steps and difficult control of modified montmorillonite catalyst

Active Publication Date: 2014-12-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The preparation methods of the above modified montmorillonite catalysts are very complicated, with many operation steps, long time and difficult control

Method used

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  • Modified montmorillonite catalyst, preparation and application thereof
  • Modified montmorillonite catalyst, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 200g of sodium-based montmorillonite (average particle size 5 μm) into a muffle furnace, control the temperature at 300 ° C for 6 hours, add to 4000 ml of sulfuric acid solution with a mass concentration of 5% after cooling, and stir and react at 80 ° C for 6 h. Then filter, wash with 30°C deionized water until the filtrate is free of SO42-, and dry in a drying oven at 120°C for 4 hours. The modified montmorillonite catalyst (note C1) was obtained. The prepared catalyst was stored in a desiccator.

Embodiment 2

[0032] Weigh 200g of Na-based montmorillonite (average particle size 25μm) into a muffle furnace, control the temperature at 600°C and roast for 3 hours, add it to 4000ml of hydrochloric acid solution with a mass concentration of 10% after cooling, and stir and react at 60°C for 8h. Then filter, wash with deionized water at 50°C until the filtrate is free of CL-, and dry in a drying oven at 95°C for 8 hours. The modified montmorillonite catalyst C2 was obtained. The prepared catalyst was stored in a desiccator.

Embodiment 3

[0034] Weigh 200g of calcium-based montmorillonite (average particle size 15 μm) into a muffle furnace, control the temperature at 250 ° C for 8 hours, add it to 2000 ml of hydrochloric acid solution with a mass concentration of 35% after cooling, and stir and react at 90 ° C for 4 h. Then filter, wash with 50°C deionized water until the filtrate is free of CL-, and dry in a drying oven at 85°C for 8 hours. The modified montmorillonite catalyst C3 was obtained. The prepared catalyst was stored in a desiccator.

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Abstract

The invention relates to a modified montmorillonite catalyst, a preparation method and an application thereof. The preparation method of the modified montmorillonite catalyst comprises the following steps: selecting montmorillonite with average particle size of 1-50mum and roasting for 2-8 hours at 200-600 DEG C; adding an inorganic acid solution with mass concentration of 5-40% in the roasted and activated montmorillonite, wherein the solid-liquid mass ratio of montmorillonite to the acid solution is 1: 5-30, reacting for 2-8 hours under temperature of 60-110 DEG C to obtain a montmorillonite slurry; filtering the montmorillonite slurry, washing by deionized water under 30-60 DEG C, and then drying the washed and filtered montmorillonite at 60-120 DEG C. The catalyst has the advantages of simple preparation technology, wide raw material source, good stability and high yield. The catalyst is used for performing an alkylation synthesis to obtain a compound by taking p-dihydroxybenzene, organic acidity and benzene as raw materials, and the alkylation catalysis performance is good.

Description

Technical field: [0001] The invention relates to a modified montmorillonite catalyst and its preparation and application. Background technique: [0002] Montmorillonite is a silicate with layered structure and flaky crystals. Its unit cell structure is composed of silicon-oxygen tetrahedron (T) and aluminum-oxygen (or hydroxyl) octahedron (O) arranged alternately. The main unit is The layer is 2:1 type, that is, a T-O-T layer composed of two tetrahedrons sandwiching an octahedron [1-3]. Since the unit cell of montmorillonite has a negative charge and has the ability to adsorb cations, there are cations such as Ca, Mg, Na, and K in the layered structure of montmorillonite. There is only electrostatic interaction between these cations and the unit cell of montmorillonite, which is very weak and easily exchanged by other cations. Therefore, montmorillonite possesses the properties of two-dimensional channels and macroporous molecular sieves, which can be used as industrial ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16C07D307/83C08L23/12C08K5/1535
CPCY02P20/52
Inventor 褚洪岭何玉莲徐艳李建忠何昌洪董平王桂芝西晓丽王伟众马建英包静严张大伟邓旭亮崔锡红邵荣兰贾云刚赵光辉佟华芳王东军于秀娟
Owner PETROCHINA CO LTD
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