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Synthetic process of ZSM-5 and MAPO-5 two-structure molecular sieve

A dual-structure molecular sieve, MAPO-5 technology, applied in the direction of molecular sieve catalysts, molecular sieves and alkali-exchanged phosphates, chemical instruments and methods, etc., can solve the problems of low catalyst reaction selectivity and poor activity, and achieve optimal catalyst pore distribution and The effect of acid distribution

Inactive Publication Date: 2008-05-28
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1, purpose of the invention: the present invention provides a kind of synthetic method of ZSM-5 and MAPO-5 double structure molecular sieve, its purpose is to solve the existing technology of preparing the catalyzer that is used in the fluidized catalytic cracking process of oil refining industry, obtained The catalyst has problems such as low reaction selectivity and poor activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 1.1 grams of zirconia and 105 grams of deionized water and mix them in a constant temperature water bath at 45 ° C. After stirring and dissolving completely, add 13.2 grams of pseudoboehmite with a water content of 27% and stir for a certain period of time, then add 14 ml of phosphoric acid drop by drop. After stirring, add 14ml of triethylamine dropwise, then mix with the mixture of 20g of ZSM-5 and 35g of water prepared in advance, age at 30°C for 5 hours, and then at 40°C for 30 A gel was obtained after 10 minutes of aging;

[0017] Put the above gel into a white steel tank lined with a polytetrafluoroethylene inner membrane, heat crystallization at 130°C for 48 hours, and recover the product. Medium with 7% NH 4 NO 3 The aqueous solution was exchanged for 5 hours, then filtered and washed several times, dried at 105°C for 2 hours, and then calcined at 590°C for 3 hours to obtain the finished product. The X-ray powder diffraction data of the obtained product ...

Embodiment 2

[0019] Weigh 1.4 grams of zirconia and 110 grams of deionized water and mix them in a constant temperature water bath at 33 ° C. After stirring and dissolving completely, add 13.8 grams of pseudo-boehmite with a water content of 27%. After a certain period of time, add 15 ml of phosphoric acid dropwise and stir for several times. Add 15ml triethylamine dropwise after 1 hour, then mix with the mixture of 35g ZSM-5 and 40g water prepared in advance, age at 60°C for 30 minutes, then pass through 58°C at 24°C A gel was obtained after 1 hour of aging;

[0020] Put the above gel into a white steel tank lined with a polytetrafluoroethylene inner membrane, heat crystallization at a constant temperature of 145°C for 72 hours, and recover the product. Medium with 8% NH 4 NO 3 The aqueous solution was exchanged for 6 hours, then filtered and washed several times, dried at 110°C for 2 hours, and then calcined at 580°C for 4 hours to obtain the finished product. The X-ray powder diffrac...

Embodiment 3

[0022] Weigh 1.0 g of zirconium sulfate and mix it with 100 g of deionized water, stir in a constant temperature water bath at 53°C to dissolve completely, add 11 g of pseudoboehmite with a water content of 27%, add 13 ml of phosphoric acid dropwise after a certain period of time, and stir After a few hours, add 13ml triethylamine drop by drop, stir well, then add and mix with the mixture of 25g ZSM-5 and 35g water prepared in advance, age at 45°C for 2.5 hours, and then After 28 hours of aging under the condition of ℃, the gel was obtained;

[0023] Put the above gel into a white steel tank lined with a polytetrafluoroethylene inner membrane, heat crystallization at 130°C for 72 hours, and recover the product. Medium with 10% NH 4 NO 3 The aqueous solution was exchanged for 6 hours, then filtered and washed several times, dried at 106°C for 3 hours, and then calcined at 576°C for 4 hours to obtain the finished product. The X-ray powder diffraction data of the resulting fin...

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Abstract

This invention relates to a method to synthesize ZSM-5 and MAPO-5 binary structure molecular sieves, which mainly adopts M heteroatom source, aluminium source, phosgene source, template reagent, ZSM-5 and deionized water as raw materials, and the mole ratio of MxOy, Al2O3, P2O5, R and H2O is (0.5~1.5) : (5~15) : (4~20) : (4~20) : (100~2000), where x and y represent the number of M and O atoms in the heteroatom source; R represents template reagent; ZSM-5 is original ZSM-5 powder and is taken at any ratio to the mixture. The raw materials are mixed at 10~95 deg. C, stirred to homogeneity and crystallized at 20~200 deg. C for 5~200 hours after aging. The product is recycled, filtered, washed, exchanged, dried and baked to obtain catalyst product. In the molecular sieves synthesized in this invention, MAPO-5 can be more equably distributed on the surface of ZSM-5, and this method has potential value in catalytic cracking, catalytic decomposition and hydrogenation cracking of heavy oil and some other fine chemical fields.

Description

1. Technical field: [0001] The invention relates to a method for synthesizing double-structure molecular sieves, more specifically to a method for synthesizing ZSM-5 and MAPO-5 double-structure molecular sieves. 2. Background technology: [0002] Fluid catalytic cracking (FCC) is one of the most important processes in the oil refining industry. The simple catalyst formulation currently used in this process is difficult to meet the increasing requirements of commercial and environmental protection. A key factor to improve the conversion depth of heavy oil catalytic cracking and the yield of light oil is that the catalyst should have a suitable pore distribution and acidity distribution. , the catalytic material is required to provide heavy oil molecules with a "relay" catalytic cracking pore structure from large to small. Therefore, researching and synthesizing molecular sieve materials with certain pore size and acidity distribution is the goal pursued by scientists in this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04C01B39/38C01B39/54B01J29/06
Inventor 连丕勇王富丽黄世勇王学丽任涛
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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