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Preparation and application of coating slurry for cellular carrier catalyst

A technology of honeycomb carrier and coating slurry, which is applied in the direction of catalyst activation/preparation, molecular sieve catalyst, physical/chemical process catalyst, etc. It can solve the problems of easy peeling off of the coating and poor coating firmness, so as to achieve a firm coating and not easy to fall off , The preparation method is simple and easy to implement

Active Publication Date: 2013-07-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patented active component coating has poor firmness, and the coating is easy to fall off during use

Method used

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  • Preparation and application of coating slurry for cellular carrier catalyst

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preparation example Construction

[0018] In the preparation method of the honeycomb carrier catalyst containing the molecular sieve composition coating provided by the present invention, the coating of the honeycomb carrier with the coating slurry can be carried out according to the existing method, including contacting the coating slurry with the honeycomb carrier, making the The coating slurry is filled with all the pores of the honeycomb carrier, and then the outer surface of the carrier is blown clean with compressed air, dried and fired. The method for blowing the outer surface of the carrier with compressed air can be in accordance with existing methods, such as the method disclosed in CN1191127C. The drying can be done by drying, for example, drying at 100-120°C for 2-5 hours, the temperature of the calcination is preferably 600-700°C, and the calcination time is preferably 1-3 hours. After calcining, a honeycomb carrier catalyst containing a molecular sieve composition coating can be obtained, or an io...

Embodiment 1

[0023] 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 silica-alumina colloids (containing 18% by weight of silicon oxide, 3% by weight of aluminum oxide, produced by Sinopec Catalyst Qilu Branch Company, pH value is 4.2, particle diameter is 38~74nm, average particle diameter 56nm), the amount of silica-alumina glue added (as SiO 2 and Al 2 o 3 total weight) is 25% by weight of the molecular sieve weight, stirred for 10 minutes, added polyethylene glycol solution 3.24 grams (the weight percent of polyethylene glycol is 2% by weight), and the addition of this solution is 3% by weight of the molecular sieve weight %, stirred for 20 minutes to obtain a catalyst coating preparation mixture slurry (coating slurry), and the molecular sieve content in the...

Embodiment 2

[0027] 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; 57 grams of acidic silica sol (containing silicon oxide 20 % by weight, pH=2.1, product of Sinopec Catalyst Qilu Branch Company, particle diameter in silica sol is 12~35nm, average particle diameter is 20nm) and 30 grams of aluminum sol (containing alumina 10% by weight, product of Zhejiang Yuda Chemical Co., Ltd. , the particle size is 5-15 nanometers, the average particle diameter is 10nm, pH=4), the addition amount of silica sol and aluminum sol (as SiO 2 and Al 2 o 3 The total weight) is 12% by weight of the molecular sieve weight, stirred for 15 minutes; added 12 grams of polyacrylic acid solution (polyacrylic acid content is 1% by weight), and the polyacrylic acid solution addition was 10...

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Abstract

The invention relates to a method for preparing a coating slurry for a cellular carrier catalyst, which comprises the following steps: mixing a molecular sieve and water, and grinding to obtain a slurry with the molecular sieve particle diameter d90 of 1-10 microns; mixing the slurry and an Si-Al component with the particle diameter of less than 100nm in the presence or absence of a dispersant; based on the weight of the coating slurry, allowing the content of the molecular sieve in the coating slurry to be 3 to 60% by weight, allowing the weight ratio of a matrix component to the molecular sieve to be 0.1-30:100, and allowing the weight ratio of the dispersant to the molecular sieve to be 0-20:100; and the dispersant being selected from one or more of compounds with molecules containing polyhydroxyl, polyoxyethylene poly vinyl or polycarboxylic acid. The cellular carrier catalyst prepared by the coating slurry containing the molecular sieve composition prepared by the method providedby the invention has the advantages of firmer coating, gasoline conversion, strong ability of olefin conversion and high propylene yield.

Description

technical field [0001] The invention relates to a slurry of a honeycomb carrier catalyst coated with a molecular sieve composition for gasoline conversion and its preparation and application. 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 carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/00B01J37/02B01J35/04B01J29/08B01J29/40B01J29/85C10G11/05C07C11/06C07C4/06
CPCY02P20/52
Inventor 邵潜王鹏田辉平孙言
Owner CHINA PETROLEUM & CHEM CORP
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