High-silicon Y zeolite and preparation method thereof

A zeolite and high-silicon technology, applied in the directions of crystalline aluminosilicate zeolite, fajhedral crystalline aluminosilicate zeolite, etc., can solve the problems of harsh preparation conditions of the guiding agent, and achieve easy filtration and recovery, high surface energy, and improved catalysis. performance effect

Inactive Publication Date: 2018-12-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation conditions of the directing agent in this method are relatively harsh, requiring constant temperature at 35°C for 20h, or constant temperature at 4°C for two days, and then constant temperature at 35°C for 20h

Method used

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  • High-silicon Y zeolite and preparation method thereof
  • High-silicon Y zeolite and preparation method thereof
  • High-silicon Y zeolite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 2.34g of sodium metaaluminate into a beaker, add 31.5mL of distilled water, stir until the sodium metaaluminate is completely dissolved, add 5.86g of sodium hydroxide, continue stirring until the solution is clear and cool to room temperature, add 22.5mL of water under vigorous stirring Glass, stir for about 15 minutes to make the mixture uniform, move the beaker to a 30°C water bath, stir and age for 16 hours to make a directing agent. The molar ratio of each component in the directing agent is 13Na 2 O:Al 2 o 3 : 15SiO 2 : 320H 2 O.

[0037] Add 37.0mL of distilled water into the beaker, weigh 1.20g of sodium metaaluminate and 5.0g of sodium hydroxide into the distilled water, stir evenly to form a clear solution, slowly add 31.0mL of water glass under stirring, stir evenly, and obtain a ratio of 24.5Na 2 O: 40SiO 2 :Al 2 o 3 : 783H 2 O gel mixture. After continuous stirring for 2h, add 3.0g SiO 2 / Al 2 o 3 5.0 industrial NaY zeolite and 3.0 mL of d...

Embodiment 2

[0044] Weigh 2.34g of sodium metaaluminate into a beaker, add 49.5mL of distilled water, stir until the sodium metaaluminate is completely dissolved, add 3.19g of sodium hydroxide, continue stirring until the solution is clear and cool to room temperature, add 18.0mL of water under vigorous stirring glass, stir for about 15 minutes to make the mixture uniform, move the beaker to a 25°C water bath, stir and age for 16 hours, and make a directing agent. The molar ratio of each component in the directing agent is 8.7Na 2 O:Al 2 o 3 : 12SiO2 2 : 400H 2 O.

[0045] Add 36.0mL of distilled water into the beaker, weigh 1.20g of sodium metaaluminate and 7.11g of sodium hydroxide into the distilled water, stir evenly to form a clear solution, slowly add 35.0mL of water glass under stirring, stir evenly, and obtain a ratio of 19.8Na 2 O: 40SiO 2 :Al 2 o 3 :800H 2 O gel mixture. After continuous stirring for 2h, add 6.0g SiO 2 / Al 2 o 3 5.0 industrial NaY zeolite and 5.5mL o...

Embodiment 3

[0053] Weigh 2.34g of sodium metaaluminate into a beaker, add 40.5mL of distilled water, stir until the sodium metaaluminate is completely dissolved, add 6.80g of sodium hydroxide, continue stirring until the solution is clear and cool to room temperature, add 27.0mL of water under vigorous stirring Glass, stir for about 15 minutes to make the mixture uniform, move the beaker to a 30°C water bath, stir and age for 12 hours, and make a directing agent. The molar ratio of each component in the directing agent is 15Na 2 O:Al 2 o 3 : 18SiO 2 : 400H 2 O.

[0054] Add 40.0mL of distilled water into the beaker, weigh 1.20g of sodium metaaluminate and 7.11g of sodium hydroxide into the distilled water, stir evenly to form a clear solution, slowly add 31.0mL of water glass under stirring, stir evenly, and obtain a ratio of 30Na 2 O: 40SiO 2 : Al 2 o 3 :800H 2 O gel mixture. After continuous stirring for 2h, add 6.0g SiO 2 / Al 2 o 3 10.0 industrial NaY zeolite and 4.0 mL of...

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Abstract

The invention relates to high-silicon Y zeolite and a preparation method thereof. The preparation method comprises the following steps of: adopting industrial high-silicon NaY zeolite as a growth carrier, adopting a silicon source, an aluminium source, a guiding agent and distilled water as reaction materials, without adding any template agent, carrying out hydrothermal crystallization reaction toprepare and obtain a zeolite material which uses 0.6-1.0mum single-crystal NaY zeolite particles as a core phase and uses polycrystal zeolite aggregate formed by 50-400nm nano Y zeolite particles asa shell layer. The high-silicon Y zeolite and the preparation method have the beneficial effects that the catalytic activity of the prepared high-silicon Y zeolite in macromolecular catalytic reactionis obviously improved, and in cracking of triisopropylbenzene, the conversion rate is increased by 20-55% compared with industrial high-silicon NaY zeolite.

Description

technical field [0001] The invention relates to a zeolite material, in particular to a Y-type zeolite with a core-shell structure with a high silicon-aluminum ratio, and a preparation method for the zeolite. Background technique [0002] The over-exploitation of fossil energy has led to a continuous decline in the output of light crude oil in crude oil reserves, and a continuous increase in the output of heavy crude oil ( Fuel 2013, 106, 498-504.). In addition to the difficulty of extraction and transportation, the heavy quality of crude oil also makes its processing more and more difficult ( Ind. Eng. Chem. Res. 2007, 46, 8363-8370.). In crude oil processing, fluid catalytic cracking (FCC) technology is undoubtedly the most important refining technology. This process converts atmospheric or vacuum heavy oils into fuel oils, primarily gasoline and diesel. [0003] The difficulty in FCC processing is that the molecular size of heavy oil or extra heavy oil is larger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24C01P2002/72C01P2002/85C01P2002/86C01P2004/03C01P2004/04C01P2004/62C01P2006/12
Inventor 李瑞丰郑家军杜艳泽秦波王琰于峰李彪高禾鑫
Owner TAIYUAN UNIV OF TECH
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