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Prepn of catalyst material containing nano molecular sieve

A technology of catalytic materials and molecular sieves, which is applied in the field of preparation of catalytic materials, can solve problems such as long preparation time, and achieve the effects of not being easy to aggregate, reducing costs, and simplifying operations

Inactive Publication Date: 2004-11-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation time of this method is longer

Method used

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Examples

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preparation example Construction

[0014] As mentioned above, the preparation method of the catalytic material containing nano-molecular sieve provided by the present invention comprises: pH is 1-4, SiO 2 and / or Al 2 o 3 Acidic silica sol or acidic aluminum sol or a mixture of acidic silica sol and aluminum sol with a content of 10-50% by weight and a molecular sieve slurry containing 10-50% by weight of nanometer molecular sieves and having a pH of 9-14 according to (SiO 2 and / or Al 2 o 3 ) / molecular sieve=0.2-2 weight ratio is mixed under agitation, the pH of the mixture obtained after mixing is 7-9.5, thereby forming a gel; then the obtained gel is dried and pulverized or shaped to obtain the nano-molecular sieve of the present invention catalytic material.

[0015] The acidic silica sol in the method provided by the present invention can be a commercially available acidic inorganic silica sol, or an acidic hydrolysis solution of silicon obtained by hydrolyzing organic silicate. Described organosilicate...

Embodiment 1

[0021] Preparation of nano-beta molecular sieves. Nano-beta molecular sieves were synthesized according to the method described in Example 7 of Chinese patent application 00107486.5.

[0022] Pseudoboehmite (containing Al 2 o 3 56.6% by weight, product from Zhoucun Catalyst Factory), sodium hydroxide (chemically pure, product from Beijing Chemical Plant), tetraethylammonium hydroxide solution (2.633N, Daxing Xingfu Institute of Fine Chemical Industry) add deionized water, heat to dissolve , stir evenly to make a working solution, mix coarse-pore silica gel (80-120 mesh, 3.7% ignition loss, Qingdao Ocean Chemical Factory) with the above-mentioned working solution, make the surface of the silica gel wet by the working solution, and obtain a reaction mixture, wherein The molar ratio of each component is SiO 2 / Al 2 o 3 =30,Na 2 O / SiO 2 =0.075, TEAOH / SiO 2 =0.09,H 2 O / SiO 2 =6.5, then add additive SY1634-70 (50% by weight)+Tween-65 (50% by weight) (wherein SY1634-70 is a...

Embodiment 2

[0025] Nano β Molecular Sieve / SiO 2 Preparation of complexes.

[0026]Dissolve 20.8 g of ethyl orthosilicate (produced by Beijing Chemical Reagent Company, analytically pure) in 5.76 g of absolute ethanol (Beijing Chemical Plant, analytically pure), and add it dropwise to 100 ml of 0.01M HCl under stirring to obtain silicon hydrolysis After the clarified sol (pH=2), then 28.8g of the nano-beta molecular sieve slurry obtained in Example 1 (the molecular sieve concentration in the slurry is 38% by weight, adjust its pH=14 with 0.8M NaOH) was added to the above-mentioned silica sol under stirring. In the process, the sol forms a gel within 10-20 seconds (the pH=9 of the gel is measured with precision pH test paper). The resulting gel was dried at 40° C. to obtain a composite xerogel containing 65% molecular sieve. Grind the product, sieve 40-60 mesh particles, beat and wash twice with hot water at 60°C, then exchange ammonium with 400ml of 1N ammonium chloride solution for 4 ti...

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Abstract

The preparation process of catalyst material containing nano molecular sieve includes: mixing acid silicon and / or alumina sol with pH 1-4 and containing SiO2 and / or Al2O3 10-50 wt% and molecular sieve slurry with pH 9-14 and containing nanometer molecular sieve 10-50 wt% in the weight ratio between SiO2 and / or Al2O3 to molecular sieve of 0.2-2; forming the mixture of pH 7-9.5 into gel; and drying and crushing or shaping the gel.

Description

technical field [0001] The invention relates to a preparation method of a catalytic material containing nanometer molecular sieves. Background technique [0002] Nano-molecular sieves refer to molecular sieves with a particle size between 1-100nm. 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-molecular sieves prevents them from stably existing alone, and is easy to aggregate. After aggregatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06C01B39/02
Inventor 王永睿闵恩泽
Owner CHINA PETROLEUM & CHEM CORP
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