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Preparation method for nano-Y-shaped molecular sieve/amorphous silicon-aluminum composite material

A technology of amorphous silicon aluminum and composite materials, which is applied in the field of preparation of molecular sieve composite materials, can solve problems such as complex process, long time, and additional auxiliary equipment, and achieve the goal of increasing product yield, increasing product yield, and improving selectivity Effect

Active Publication Date: 2012-05-16
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation time is longer
[0009] The methods for synthesizing nano-molecular sieves in the above-mentioned documents or patents are either complicated in process and take a long time, or the particles of the synthesized nano-molecular sieves are large and exceed the nanometer range; in the preparation of the catalytic material containing nano-molecular sieves described in CN02100379.3, due to the inclusion of acidic In the process of silica sol or acid aluminum sol, the structure of nano molecular sieve will be destroyed to a certain extent
CN200610165597.0 added microwave and / or ultrasonic treatment process in the process of synthesizing nanometer Y-type molecular sieve, increased auxiliary equipment, the cost of synthesizing nanometer Y-type molecular sieve is greatly increased

Method used

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  • Preparation method for nano-Y-shaped molecular sieve/amorphous silicon-aluminum composite material
  • Preparation method for nano-Y-shaped molecular sieve/amorphous silicon-aluminum composite material
  • Preparation method for nano-Y-shaped molecular sieve/amorphous silicon-aluminum composite material

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Experimental program
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Effect test

Embodiment 1

[0035] Example 1: Preparation method of Y-type molecular sieve / amorphous silicon-aluminum composite material.

[0036] (1) Synthetic guiding agent: use water glass as the silicon source and sodium metaaluminate as the aluminum source. Take 48g of water glass (modulus 3.0), add 8g of polyethylene glycol PEG-2000, stir at 15°C at a stirring speed of 200 rpm for 1 hour to obtain solution A; dissolve 7.8g of sodium hydroxide in 24mL Add 1.6 g of sodium metaaluminate to the water, and stir until the sodium metaaluminate is completely dissolved to obtain solution B; stir solution A at a stirring speed of 3000 rpm, pour solution B into solution A, and continue to stir at 3000 rpm Stir for 1.5 hours at a stirring speed of 200 rpm at 15°C and age for 12 hours at a stirring speed of 200 rpm. . Except surfactant, the molar ratio of other components is 0.04PEG-200:18Na 2 O:Al 2 o 3 : 22SiO 2 : 426H 2 O, the surfactant accounts for 7.3% of the total weight of the directing agent (in...

Embodiment 2

[0041] (1) Synthesis of guiding agent: take 42g of water glass (modulus 3.0), add 10g of Tween-20, and stir for 1 hour at 15°C with a stirring speed of 200 rpm to obtain solution A; oxidize 7.8g of hydrogen Dissolve sodium in 24mL of water, then add 1.6g of sodium metaaluminate, and stir until the sodium metaaluminate is completely dissolved to obtain solution B; stir solution A at a stirring speed of 3000 rpm, and pour solution B into solution A , continue to stir at a stirring speed of 3000 rpm for 1.5 hours, and finally stir and age at a stirring speed of 200 rpm at 15°C for 12 hours, add 18 mL of water after aging, and continue to stir at a stirring speed of 200 rpm at 15°C Stir for 0.5 hours. Except surfactant, the molar ratio of other components is _18Na 2 O:Al 2 o 3 : 20SiO2 2 : 380H 2 O, surfactant accounts for 9.7% of total weight (containing surfactant). Set aside for 15 hours.

[0042] (2) Synthesis of nanometer Y-type molecular sieve: Dissolve 3g of sodium h...

Embodiment 3

[0046] (1) Synthesis of guiding agent: take 36g of water glass (modulus 3.0), add 5g of polypropylene glycol-1000, and stir for 1 hour at 15°C with a stirring speed of 200 rpm to obtain solution A; oxidize 5.4g of hydrogen Dissolve sodium in 24mL of water, then add 1.6g of sodium metaaluminate, and stir until the sodium metaaluminate is completely dissolved to obtain solution B; stir solution A at a stirring speed of 3000 rpm, and pour solution B into solution A , continue to stir at a stirring speed of 3000 rpm for 1.5 hours, and finally stir and age at a stirring speed of 200 rpm at 15°C for 12 hours, add 20.4mL of water after aging, and continue to stir at 200 rpm at 15°C Stir at high speed for 0.5 hours. Except surfactant, the molar ratio of other components is 15Na 2 O:Al 2 o 3 : 18SiO 2 : 360H 2 O, the surfactant accounts for 5.4% of the total weight of the directing agent (including the surfactant). Set aside for 12 hours.

[0047] (2) Synthesis of nano Y-type mo...

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Abstract

The invention relates to a preparation method for a nano-Y-shaped molecular sieve / amorphous silicon-aluminum composite material. According to the method, a guiding agent is synthesized, and a surfactant is added during the guiding agent synthesizing process; a surfactant is added during a preparation and synthesis process of gel of the Y-shaped molecular sieve, and a hydrothermal crystallization method is adopted to synthesize the nano-Y-shaped molecular sieve; an aqueous solution of a mixture is added to the slurry containing the nano-Y-shaped molecular sieve, wherein the mixture comprises water glass and an aluminum source; an acid is added to adjust the pH value to 7-9.5 to form the gel; the gel is washed, dried and baked to obtain the composite material. According to the present invention, the grain of the Y-shaped molecular sieve in the composite material prepared by the method of the present invention is maintained to less than 100 nm, and the composite material of the present invention is suitable for catalytic cracking reactions and hydrocracking reactions of heavy oil macromolecules.

Description

technical field [0001] The invention relates to a method for preparing a molecular sieve composite material, in particular to a method for preparing a Y-type molecular sieve / amorphous silicon-aluminum composite material. Background technique [0002] Nano-molecular sieves refer to molecular sieves with particle sizes ranging from 1 to 100 nm. The ratio of the number of atoms on the surface to the total number of atoms in the bulk increases sharply as the particle size decreases, making nano-molecular sieves a new material with unique catalytic properties. . The characteristics of nano-molecular sieves are as follows: 1) It has a larger outer surface area, which exposes more active centers, effectively eliminates the diffusion effect, and fully exerts the catalyst efficiency; 2) Has more pores exposed to the outside , It is not easy to be blocked by reaction deposits, which is beneficial to prolong the reaction operation period. However, the high surface energy of nano-mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C01B39/24C07C4/06
Inventor 庞新梅刘百军何琳琳盖有东高晓慧周志远刘从华阎立军
Owner PETROCHINA CO LTD
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