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Preparation method of binder-free mordenite catalyst

A mordenite and binder-free technology, which is applied in the direction of catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation process and high cost, achieve good technical effect, increase content and improve activity Effect

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the preparation process of mordenite in the prior art uses seed crystals or directing agents, the preparation process is complicated and the cost is high, and a new method for preparing a binder-free mordenite catalyst is provided

Method used

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  • Preparation method of binder-free mordenite catalyst
  • Preparation method of binder-free mordenite catalyst
  • Preparation method of binder-free mordenite catalyst

Examples

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Effect test

Embodiment 1

[0024] Get 40 grams of colloidal silica sol and 16 grams of aluminum sulfate that are 40% by weight, after mixing and stirring, add 10 milliliters of sodium carbonate solution of 1 mol / liter, mix and stir, then the agent bar is formed, and the forming catalyst is at 80 Dry at ℃ for 3 hours, then put it into a 200-milliliter autoclave containing 40 grams of a mixed solution of water and hexamethylenediamine in the bottom layer of the liner with a mass ratio of 1:1. The catalyst and liquid water are not in contact, and the autoclave is sealed and put into an oven. Take it out after crystallization at 180°C for 60 hours, then wash it twice, put it in an oven for drying at 120°C for 3 hours, put it in a muffle furnace and bake it at 400°C for 2 hours, and then bake it at 550°C for 3 hours to obtain non-sticky Binder mordenite catalyst. The XRD pattern of the prepared catalyst is as follows figure 1 As shown, it shows a mordenite phase, wherein the weight percentage of mordenite i...

Embodiment 2

[0026] According to the method of embodiment 1, other conditions are constant, and raw material composition ratio is as shown in table 1, does not put organic templating agent in the autoclave, only puts into the water of 80 grams, the binderless mordenite catalyst that makes is as shown in the table 2.

Embodiment 3～6

[0028] According to the method of Example 1, other conditions remain unchanged, the raw material composition ratio is shown in Table 1, and the binderless mordenite catalyst obtained is shown in Table 2.

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Abstract

The invention relates to a preparation method of a binder-free mordenite catalyst, mainly aiming at solving the problems that the existing preparation method of the mordenite is complex in preparation process and higher in cost by using a seed crystal or a guiding agent. By adopting the technical scheme, the preparation method comprises the steps of mixing 0.01-20wt% of alkaline substance, 0.5-40wt% of aluminum compound and 40-80wt% of silicon oxide, shaping the mixture, drying the mixture, putting the mixture into water vapor containing at least one of template agents of water, ammonia water, quadrol, triethylamine, n-butylamine, hexamethylene diamine, tetra-propyl ammonium bromide or tetra-propyl ammonium hydroxide, and crystallizing the mixture for 10-200 hours at 120-200 DEG C to obtain the binder-free mordenite catalyst, thereby preferably solving the problems, and leading the prepared binder-free mordenite catalyst to be applied to the reaction for preparing propylene from naphtha by catalytic pyrolysis.

Description

technical field [0001] The invention relates to a method for preparing a binder-free mordenite catalyst. Background technique [0002] Molecular sieves are widely used in petrochemical and other fields because of their uniform and regular pore structure, large specific surface area and high thermal stability, and good shape-selective catalytic performance and adsorption performance. Because molecular sieve powder itself has low strength and is easy to disperse and lose, it cannot be directly applied in industry. Therefore, it is necessary to add a binder during molding to increase the strength. In the molded catalyst, because the binder wraps the molecular sieve, resulting in The effective utilization rate of molecular sieves decreases, and the pores of some molecular sieves are blocked, resulting in low specific surface area and low activity of the catalyst. Because the binder has an irregular pore structure, it is difficult for the reaction raw materials and products to di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/18B01J37/00C10G11/05
Inventor 马广伟徐建军任丽萍
Owner CHINA PETROLEUM & CHEM CORP
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