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Adhesive-free zeolite catalyst and preparation method thereof

A zeolite catalyst, binderless technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Effect

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] One of the technical problems to be solved by the present invention is that the catalyst prepared by the prior art contains a binder, and the activity of the catalyst is low; a new binderless zeolite catalyst is provided, which has the advantage of higher activity

Method used

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  • Adhesive-free zeolite catalyst and preparation method thereof
  • Adhesive-free zeolite catalyst and preparation method thereof
  • Adhesive-free zeolite catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Take 60 grams of ZSM-5 molecular sieve with a silicon-aluminum ratio (molecular ratio, the same below) of 30, add 40 grams of silica sol with a weight percentage of 40%, mix and stir evenly, and then add 1 mol / liter of sodium hydroxide The solution is 10 ml, mixed and stirred evenly, and then the agent bar is formed, and the formed catalyst is dried at 80°C for 3 hours, and then put into an autoclave containing water at the bottom of the liner. The catalyst and liquid water are not in contact. After crystallization at 170°C for 60 hours, take it out, then wash it twice, put it in an oven for 3 hours at 120°C, put it into a muffle furnace and bake it at 400°C for 2 hours, then at 550°C for 3 hours to obtain non-sticky Binder ZSM-5 catalyst. The XRD pattern of the prepared catalyst is as follows figure 1 As shown, it appears as a pure ZSM-5 phase. Scanning electron microscope pictures of the prepared catalysts are as follows: figure 2 As shown, it appears to be pure ZS...

Embodiment 2

[0030] According to the method of Chinese patent CN101428233A, the ZSM-5 / beta zeolite mixed crystal molecular sieve with a silicon-aluminum ratio of 40 is prepared. Take 60 grams of ZSM-5 / beta zeolite, add 40 grams of silica sol with a weight percentage of 40%, mix and stir evenly, then add 2 grams of magnesium oxide, mix and stir evenly, and then form the agent bar, and the forming catalyst is heated at 80°C Dry for 3 hours, then put it into an autoclave containing water at the bottom of the liner. The catalyst and liquid water are not in contact. After the autoclave is sealed, put it into the oven. After crystallization at 165°C for 80 hours, take it out, then wash it twice, and put it in the oven Dry at 120°C for 3 hours, place in a muffle furnace for calcination at 400°C for 2 hours, and 550°C for 3 hours to prepare a binder-free ZSM-5 / β zeolite catalyst as shown in Table 1. The XRD pattern of the prepared catalyst shows that ZSM-5 and β zeolite intergrowth phase. The sca...

Embodiment 3～16

[0032] Take mordenite with a silicon-aluminum ratio of 20, 60 grams of Y zeolite with a silicon-aluminum ratio of 10, MCM-22 molecular sieve with a silicon-aluminum ratio of 40, ZSM-5 / mordenite symbiotic molecular sieve with a silicon-aluminum ratio of 20, and silicon-aluminum ratio ZSM-5 / beta zeolite / Y zeolite symbiotic molecular sieve with a ratio of 40, ZSM-5 / Y zeolite / mordenite symbiotic molecular sieve with a silicon-aluminum ratio of 20, ZSM-23 with a silicon-aluminum ratio of 20, and a silicon-aluminum ratio of 30 ZSM-11, MCM-49 with a silicon-aluminum ratio of 40, MCM-56 with a silicon-aluminum ratio of 60, ZSM-5 / Y symbiotic molecular sieves with a silicon-aluminum ratio of 20, MCM-22 / mordenite with a silicon-aluminum ratio of 40 , the ZSM-5 / Magadiite that the silicon-aluminum ratio is 200, the ZSM-5 / beta zeolite / mordenite that the silicon-aluminum ratio is 30, raw material proportioning is such as table 1, according to the method for embodiment 1, obtains binderless mo...

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Abstract

The invention relates to an adhesive-free zeolite catalyst and a preparation method thereof. The problem of low activity of the conventional catalyst is mainly solved. According to the new adhesive-free zeolite catalyst, the problem is well solved by adopting the technical scheme that the pore volume is 0.1 to 0.3 milliliter per gram, the average aperture is 50 to 70 nanometers, the porosity is 20 to 30 percent, and the content of the adhesive is 0 to 5 percent; the catalyst has the advantage of relatively high activity; the preparation method can be applied to industrial preparation of the adhesive-free catalyst; and the prepared catalyst can be used in the reaction of preparing ethylene and propylene by catalytic pyrolysis of naphtha.

Description

technical field [0001] The invention relates to a binderless zeolite catalyst and a preparation method thereof. Background technique [0002] Zeolite molecular sieves are widely used in petrochemical and other fields due to their uniform and regular pore structure, large specific surface area and high thermal stability, good shape-selective catalytic performance and adsorption performance. Since the molecular sieve needs to be formed by adding a binder during use, in the formed catalyst, the effective utilization rate of the molecular sieve is reduced due to the binder wrapping the molecular sieve, resulting in a low specific surface area and low activity of the catalyst. Due to the irregular pore structure of the binder, it is difficult for the reaction raw materials and products to diffuse in the catalyst, and it is easy to deposit carbon, which has a certain impact on the life of the catalyst. Converting the binder in the catalyst into an effective component molecular si...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/70B01J29/18B01J29/08B01J29/80C10G11/05C07C4/06C07C11/04C07C11/06
CPCY02P20/52
Inventor 马广伟肖景娴
Owner CHINA PETROLEUM & CHEM CORP
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