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EU-1 molecular sieve and synthesis method thereof

A technology of EU-1 and synthesis method, which is applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high cost and achieve the effects of promoting synthesis, high acid density, and reducing synthesis cost

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main raw material aluminum source used in this patent is FAU molecular sieve. FAU molecular sieve is also synthesized by hydrothermal crystallization. Compared with conventional aluminum sources such as sodium aluminate and aluminum sulfate, the cost is too expensive

Method used

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  • EU-1 molecular sieve and synthesis method thereof
  • EU-1 molecular sieve and synthesis method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, put 16g of aluminum nitrate in a high-temperature furnace and bake it at 500°C for 3 hours to obtain alumina. Then take 1.11g of sodium hydroxide, 0.82g of sodium aluminate, and 6g of hexamethyldiammonium bromide in 50mL of distilled water, stir until they are completely dissolved, then add 8.3g of white carbon black, and put them into a reactor for crystallization at 190°C for 7h. Then add 50mL of distilled water, 4g of tetraethylammonium bromide and alumina, and stir for 30 minutes; then evaporate 90mL of distilled water at 140°C, put it into a closed reaction kettle, and crystallize in an oven at 190°C for 72h. The obtained product was washed 4 times with distilled water to neutrality, and then dried at 120°C for 12 hours. The obtained sample number was CL1, and the obtained sample was as follows: figure 1 As shown, it is pure EU-1 molecular sieve without other impurities.

Embodiment 2

[0039] First, put 10g of aluminum nitrate in a high-temperature furnace and bake it at 550°C for 2 hours to obtain alumina. Then take 1.11g of sodium hydroxide, 0.5g of sodium aluminate, and 5g of hexamethyldiammonium bromide in 50mL of distilled water, stir until they are completely dissolved, then add 8.3g of silica gel, and put them into a reactor for crystallization at 190°C for 6h. Then add 50mL of distilled water, 3g of tetraethylammonium bromide and alumina, and stir for 30min; then evaporate 85mL of distilled water at 140°C, put it into a closed reaction kettle, and crystallize in an oven at 190°C for 65h. The obtained product was washed 4 times with distilled water to neutrality, and then dried at 120° C. for 12 hours. The obtained sample number was CL2, which was EU-1 molecular sieve.

Embodiment 3

[0041] First, put 12g of aluminum nitrate in a high-temperature furnace and bake it at 700°C for 2.5h to obtain alumina. Then take 0.8g of sodium hydroxide, 0.25g of aluminum nitrate, and 6g of hexamethyldiammonium bromide in 50mL of distilled water, stir until they are completely dissolved, then add 8.3g of white carbon black, and put them into a reactor for crystallization at 200°C for 7h. Then add 60mL of distilled water, 4g of tetraethylammonium bromide and alumina, and stir for 30 minutes; then evaporate 80mL of distilled water at 140°C, put it into a closed reaction kettle, and crystallize in an oven at 200°C for 80h. The obtained product was washed 4 times with distilled water to neutrality, and then dried at 120° C. for 12 hours. The obtained sample number was CL3, which was EU-1 molecular sieve.

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Abstract

The invention discloses an EU-1 molecular sieve and a synthesis method thereof, wherein the crystal structure of the EU-1 molecular sieve is a typical EUO structure. The synthesis method comprises: mixing an inorganic alkali, an aluminum source, a silicon source, a templating agent and water, stirring to obtain a silicon-aluminum gel, and crystallizing for a certain time; and adding water, a second templating agent and alumina, uniformly stirring, and carrying out hydrothermal crystallization to obtain the EU-1 molecular sieve. According to the present invention, the EU-1 composite molecular sieve synthesized by the method is the low silica-alumina ratio zeolite, and has the high crystallinity; and with the synthesis method, the generation of the impurity crystal can be avoided, and the operation is simple and easy to perform.

Description

technical field [0001] The invention relates to an EU-1 molecular sieve and a synthesis method thereof, in particular to a synthesis method of a low silicon-aluminum ratio EU-1 molecular sieve, which belongs to the field of synthesis of molecular sieve catalytic materials. Background technique [0002] Zeolite molecular sieve is an important class of industrial catalyst and catalyst carrier, and is the core unit in the catalytic reaction process. Zeolite molecular sieve is a metastable crystal in crystallography, and its physical and chemical properties such as silicon-aluminum ratio, crystal size and morphology will change due to different synthesis methods. These physical and chemical properties affect and regulate the catalytic activity of zeolite. Therefore, the synthesis of zeolites with different physical and chemical properties can meet the needs of different catalytic reactions. [0003] A synthesis method often limits the types of raw materials, the range of raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02C01B39/04
CPCC01B39/02C01B39/04C01P2002/60C01P2002/72C01P2006/12
Inventor 范峰凌凤香王少军张会成杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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