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Preparation method of low abrasion microsphere catalyst produced in situ

An in-situ synthesis, low-wear technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of small growth of main active components, limited catalyst wear rate, and high cost of microsphere preparation. The reaction channel is unblocked, the utilization rate is improved, and the wear resistance is guaranteed.

Active Publication Date: 2009-12-30
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent CN101157057 reports that the silicon source, aluminum source, and phosphorus source are mixed, and spray-dried to prepare silicon-aluminum-phosphorus oxide microspheres after being pulverized by a rubber mill. After high-temperature roasting, organic amine templates and water are added for hydrothermal crystallization. , grow SAPO molecular sieves on the surface of the microspheres and in situ in the body, but the microspheres used in this method need three kinds of raw materials for rubber milling, the preparation cost of the microspheres is relatively high, and the three raw materials in the microspheres still need to have subsequent crystallization reactions Activity, the calcination temperature of the microspheres is limited, and this method does not limit the attrition rate of the prepared catalyst
[0008] At present, when the existing wear-resistant microsphere catalysts used for the conversion of oxygenates to olefins are formed, the main active ingredient is mixed with the carrier and the binder for beating, and the catalyst obtained by spray molding has high wear; or when the in-situ synthesis method is used The obtained main active ingredient grows less on the surface of the carrier, and the catalyst activity is low

Method used

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  • Preparation method of low abrasion microsphere catalyst produced in situ
  • Preparation method of low abrasion microsphere catalyst produced in situ
  • Preparation method of low abrasion microsphere catalyst produced in situ

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Preparation of kaolin microspheres

[0045] First kaolin 3000g, silica sol 1200g (solid content 25%) and deionized water 1560g are mixed into a uniform slurry, then add 12g polyvinyl alcohol, 10g polyethylene glycol and carry out rubber grinding through a rubber mill, so that the particle diameter is less than 3μm, of which 90% of the particle size is less than 2μm, and 70% of the particle size is less than 1μm; then the mixed slurry is spray-dried to obtain kaolin microspheres, the particle size is between 20-150μm, and the average particle size is 60μm , 800 ℃ roasting 1-4h, measured standard wear index 0.9% / h.

[0046] (2) Modification of kaolin microspheres

[0047] The kaolin microsphere that above-mentioned step (1) is made gets 30g, adds 60g 10%H 3 PO 4 In the solution, reflux at 80°C for 4h, wash, filter, and dry at 100-150°C for 1h.

[0048] (3) Preparation of low-wear microsphere catalyst

[0049] 7.8g pseudoboehmite (content 65%) was mixed with 30g...

Embodiment 2

[0058] (1) Preparation of kaolin microspheres

[0059] First kaolin is carried out colloidal grinding by colloid mill, makes particle diameter all less than 2 μ m, and wherein 90% particle size is less than 2 μ m, and 70% particle size is less than 1 μ m; Then get gained kaolin 3000g, aluminum sol 1200g (solid content 25 %) and deionized water 1560g to form a homogeneous slurry, the kaolin microspheres were prepared by spray drying method, the particle size is between 20-150 μm, the average particle size is 80 μm, roasted at 850 ° C for 1-4h, and the standard wear index is measured as 0.9 % / h.

[0060] (2) Modification of kaolin microspheres

[0061] Get 30g of the kaolin microspheres that step (1) makes, add 90g 20%H 3 PO 4 In the solution, reflux at 80°C for 10h, wash, filter, and dry at 100-150°C for 2h.

[0062] (3) Preparation of low-wear microsphere catalyst

[0063]7.8g pseudoboehmite (content 65%) was mixed with 30g deionized water and stirred for 30 minutes, 11.5...

Embodiment 3

[0065] (1) Preparation of kaolin microspheres

[0066] First kaolin is carried out colloid milling by colloid mill, makes particle diameter all less than 2 μ m, and wherein 90% particle diameter is less than 2 μ m, and 70% particle diameter is less than 1 μ m; Then get gained kaolin 3000g, silica sol 1200g (solid content 25 %), 1560g of deionized water were mixed into a homogeneous slurry, and kaolin microspheres were obtained by spray drying, with a particle size between 20-150 μm and an average particle size of 60 μm, roasted at 900°C for 1-4h, and measured standard wear index 0.8 % / h.

[0067] (2) Modification of kaolin microspheres

[0068] Get 30g of the kaolin microspheres that step (1) makes, add 60g 50%H 3 PO 4 In the solution, reflux at 80°C for 4h, wash, filter, and dry at 100-150°C for 4h.

[0069] (3) Preparation of low-wear microsphere catalyst

[0070] 7.8g pseudoboehmite (content 65%) was mixed with 30g deionized water and stirred for 30 minutes, 11.5g phos...

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Abstract

The invention relates a preparation method of low abrasion microsphere catalyst produced in situ, comprising following steps: preparing porous carrier microspheres by spray drying method and finally adopting hydro-thermal synthesis method to obtain the low abrasion microsphere catalyst after high temperature roasting at 800-1000 DEG C and phosphorus source modification treatment.

Description

technical field [0001] The invention relates to a catalyst, in particular to a preparation method for in-situ synthesis of low-wear microsphere catalysts. Background technique [0002] U.S. Patent US 4440871 (UCC, 1984) introduces an improved method for the synthesis of silicoaluminophosphate molecular sieve crystals, which will include reactive SiO 2 、Al 2 o 3 and P 2 o 5 The source and the organic template were added in a certain order, and the hydrothermal crystallization method obtained uniform pore size, larger than Microporous silicon-aluminum-phosphorus crystals (referred to as SAPO), the anhydrous chemical composition of raw materials during synthesis is: mR:(Si x Al y P z )O 2 Where R is an organic template, m is the ratio of R (Si x Al y P z )O 2 The mole fraction of Si, y, and z is the mole fraction of Si, Al, and P, and the value range is (x: 0.01-0.99, y: 0-0.6, z: 0.4-0.99 ), this patent relates to the synthesis of microporous SAPO series molecula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/08B01J37/10B01J29/85B01J35/10C07C1/20C07C11/02
Inventor 徐华胜王鹏飞刘飒吕爱玲胡杰卢伟京侯秀红罗勇
Owner SHANGHAI RES INST OF CHEM IND
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