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Preparation method for honeycomb supported catalyst containing coating of molecular sieve composition

A technology of honeycomb carrier and molecular sieve, which is applied in the field of honeycomb carrier catalyst preparation, can solve the problems of difficulty in increasing the molecular sieve content in the coating, the coating is easy to fall off, and the gasoline conversion activity is not high, so that it is not easy to crack and fall off, the coating is firm, Substrate properties have little influence on the effect

Active Publication Date: 2013-09-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating of the patented active component coating is easy to fall off during use, and it is difficult to increase the content of molecular sieve in the coating, and the gasoline conversion activity is not high

Method used

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  • Preparation method for honeycomb supported catalyst containing coating of molecular sieve composition
  • Preparation method for honeycomb supported catalyst containing coating of molecular sieve composition

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preparation example Construction

[0011] In the method for preparing a honeycomb carrier catalyst containing a molecular sieve composition coating provided by the present invention, the coating slurry is preferably prepared by a method comprising the following steps:

[0012] (1) mixing the molecular sieve with water and grinding to obtain a molecular sieve slurry having a molecular sieve particle diameter d90 of 1 to 10 microns;

[0013] (2) The molecular sieve slurry obtained in step (1), the phosphoraluminum glue and / or the precursor material that can form the phosphoraluminum glue and the dispersant solution are mixed, with or without adding clay; wherein, the content of the dispersant in the dispersant solution It is 1~10% by weight, the particle diameter of phosphoraluminum glue and the precursor material that can form phosphoraluminum glue are all less than 100nm, preferably 1~90nm, more preferably 1~60nm, average particle diameter is preferably 5~70nm, more preferably 5-30nm.

[0014] Wherein, in the ...

example 1

[0022] Mix 108 grams (on a dry basis, the same below) of HY-type molecular sieve powder (d90=14 microns, industrial grade, product of Sinopec Catalyst Qilu Branch) with 120.5 grams of deionized water, and wet ball mill it into a molecular sieve slurry. d90=5 microns, add 128 grams of phosphoraluminum glue in the slurry (preparation method: make a slurry of pseudoboehmite and decationized water, add concentrated phosphoric acid with a concentration of 85% by weight under stirring, and heat up to 70°C for 1 hour to prepare Obtain. Wherein contain phosphorus oxide 18% by weight, aluminum oxide 3% by weight, pH value is 1.2, particle diameter is 27~55nm, and average particle diameter is 32nm), the add-on of phosphorus aluminum glue is 25% by weight of molecular sieve weight, stir 10 minutes, add polyethylene glycol solution 3.24 grams (the weight percent of polyethylene glycol is 2 weight %), the addition of this solution is 3 weight % of molecular sieve weight, stir 20 minutes to ...

example 2

[0026] 120 grams of rare earth Y-type molecular sieve powder (d90=12 microns, RE 2 o 3 Content 3% by weight, product of Sinopec Catalyst Qilu Branch) mixed with 261 grams of deionized water, wet ball milled into a slurry, molecular sieve particle diameter d90=8 microns in the slurry; Make a slurry of aluminum and decationized water, add concentrated phosphoric acid with a concentration of 85% by weight under stirring, heat up to 60°C and react for 1 hour; it contains 10% by weight of phosphorus pentoxide, 5% by weight of aluminum oxide, and the pH value is 2.0 , particle diameter is 43 ~ 72nm, average particle diameter is 58nm), with P 2 o 5 and Al 2 o 3 The total weight of the phosphorus-aluminum glue add-on is 12% by weight of the molecular sieve weight, and stirred for 15 minutes; 12 grams of polyacrylic acid solution was added (the polyacrylic acid content is 1% by weight), and the polyacrylic acid solution add-on was 10% by weight of the molecular sieve weight, Stir ...

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Abstract

The invention provides a preparation method for a honeycomb supported catalyst containing a coating of a molecular sieve composition. The method comprises the step of coating a honeycomb support with coating slurry, wherein, the coating slurry comprises a molecular sieve, phosphorus and aluminum components, a dispersant and water, on the basis of the weight of the coating slurry, the content of the molecular sieve in the slurry is 3 to 60 wt %, the weight ratio of the phosphorus and aluminum components to the molecular sieve is 0.1-30:100, the weight ratio of the dispersant to the molecular sieve is 0-20:100, the weight of the phosphorus and aluminum components is counted on the basis of total weight of P2O5 and Al2O3, the weight of the molecular sieve is counted in terms of a dry basis, the dispersant is one compound or more compounds containing polyhydroxy groups, polyoxyethylene groups or polycarboxylic groups, the particle diameter of the phosphorus and aluminum components is less than 100 nm, and the particle diameter d90 of the molecular sieve is 1 to 10 mu m. The honeycomb supported catalyst containing the molecular sieve composition in the invention has a firm coating.

Description

technical field [0001] The invention relates to a method for preparing a honeycomb carrier catalyst comprising a molecular sieve composition coating. Background technique [0002] Molecular sieves are important catalytic materials for heterogeneous catalytic reactions, and are widely used in petroleum refining and processing, petrochemical and fine chemical production processes. In the process of use, molecular sieves or molecular sieve compositions are usually made into certain particle shapes, such as strip-shaped particle catalysts applied to particle packed beds, and microsphere catalysts applied to fluidized beds. In recent years, honeycomb carrier catalysts loaded with molecular sieve components have begun to be applied in industrial catalysis. This catalyst usually includes a honeycomb carrier and a molecular sieve component (molecular sieve or composition containing molecular sieve) loading layer, wherein the honeycomb carrier has been shaped and prepared. A monolit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08
Inventor 王鹏朱玉霞达志坚田辉平孙言石德先
Owner CHINA PETROLEUM & CHEM CORP
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