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Preparation method of hydrogen type EUO (europium oxide) type molecular sieve

A molecular sieve and hydrogen-type technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of molecular sieve loss, large amount of waste water, time-consuming, etc., achieve the effect of reducing waste water treatment, reducing waste water discharge, and improving the final yield

Active Publication Date: 2014-03-12
TAIYUAN UNIV OF TECH +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used as a catalyst, it needs to be exchanged for the hydrogen form. On the one hand, the ion exchange will cause the loss of molecular sieves, and on the other hand, a large amount of waste water will be generated, time-consuming and energy-consuming, which will bring challenges to environmental protection.

Method used

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  • Preparation method of hydrogen type EUO (europium oxide) type molecular sieve

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Experimental program
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Embodiment 1

[0020] Add 4.60ml (25%wt) tetramethylammonium hydroxide, 2.1g hexamethyldiammonium bromide, 8.92ml (25%wt) ammonium silica sol, 0.59g (24%wt) aluminum isopropoxide to 5.0g water Stir evenly, put it into the kettle, put it at 175°C to react for 5 days, then filter, wash, dry at 110°C for 2 hours, and roast at 550°C for 5 hours to obtain a hydrogen-type EUO molecular sieve. The XRD spectrum is as attached figure 1 Shown in 1.

Embodiment 2

[0022] 3.7ml (25%wt) tetramethylammonium hydroxide, 6.12ml (33%wt) ethyl orthosilicate, 0.5g hexamethyldiammonium bromide, 0.24 (24%wt) aluminum isopropoxide, 1.0g water Stir evenly, put it into the kettle, put it at 185°C to react for 4 days, then filter, wash, dry at 110°C for 2 hours, and roast at 550°C for 5 hours to obtain hydrogen-type EUO molecular sieve. The XRD spectrum is as attached figure 1 Shown in 2.

Embodiment 3

[0024] Add 7.50ml (25%wt) tetraethylammonium hydroxide, 1.9g hexamethyldiammonium bromide, 7.15ml (25%wt) ammonium silica sol, 0.31g (24%wt) aluminum isopropoxide to 2.0g water Stir evenly, put it into the kettle, put it at 195°C to react for 2 days, then filter, wash, dry at 110°C for 2 hours, and roast at 550°C for 5 hours to obtain a hydrogen-type EUO molecular sieve. The XRD spectrum is as attached figure 1 Shown in 3.

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Abstract

The invention discloses a preparation method of a hydrogen type EUO (europium oxide) type molecular sieve. The preparation method comprises the steps of uniformly mixing water, a template agent, quaternary ammonium base, a silicon source and an aluminum source when the quaternary ammonium base is tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide or tetrapropyl ammonium hydroxide; uniformly mixing the water, the quaternary ammonium base, the silicon source and the aluminum source when the quaternary ammonium base is hexamethonium hydroxide, putting the mixture into a reaction kettle for reaction, filtering, washing, drying and roasting to obtain a hydrogen type EUO molecular sieve sample. The preparation method disclosed by the invention has the advantages of low energy consumption and simple preparation without pollution.

Description

technical field [0001] The invention belongs to a method for preparing molecular sieves, in particular to a method for preparing hydrogen-type EUO-type molecular sieves. Background technique [0002] John L. Casci et al first released the molecular sieve with EUO structure in 1981 (USP4537754). Due to its unique pore structure, it has great potential in reactions such as xylene isomerization (USP200110051757) and C8 aromatic hydrocarbon isomerization (CN1260239A). Excellent catalytic performance, so it has good commercial value and application prospect. [0003] Rao et al reported the synthesis of high-silica EUO molecular sieves using dibenzyldimethylammonium as a template. Using DBDMA as a template can produce EUO molecular sieves in the range of silicon-aluminum ratio 70-600. [0004] Arnold et al. prepared EUO molecular sieves by the xerogel method, and the template agent was hexamethyldiammonium bromide. The EUO molecular sieves prepared by this method had a larger ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04
Inventor 李晓峰张燕挺贾妙娟孙晓涛狄春雨窦涛
Owner TAIYUAN UNIV OF TECH
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