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Preparing method of catalyst containing modified SAPO-34 molecular sieve and application thereof

A SAPO-34, molecular sieve technology, used in molecular sieve catalysts, hydrocarbon production from oxygen-containing organic compounds, physical/chemical process catalysts, etc., can solve the problems of high carbon deposition and low diene selectivity, and achieve large specific surface area, Low selectivity, acid-reducing effect

Inactive Publication Date: 2019-05-21
CHIA TAI ENERGY MATERIALS DALIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above technical problems, and also in order to solve the problems of high carbon deposition and low diene selectivity of the existing MTO catalysts on the market, the present invention provides a catalyst that can reduce the carbon deposition of the catalyst, improve the diffusion performance of the catalyst, and improve the diene selectivity. The preparation method of the catalyst containing modified SAPO-34 molecular sieve

Method used

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  • Preparing method of catalyst containing modified SAPO-34 molecular sieve and application thereof
  • Preparing method of catalyst containing modified SAPO-34 molecular sieve and application thereof
  • Preparing method of catalyst containing modified SAPO-34 molecular sieve and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown, the preparation method that contains the catalyst of modified SAPO-34 molecular sieve, comprises the following steps:

[0035] 1) Mix pseudo-boehmite with water evenly, then add deionized water, 85% by weight orthophosphoric acid, triethylamine, silica sol, chromium nitrate, n-propylamine in turn, and stir at 20-30°C for 2 Mix evenly in one hour, obtain mixed reaction liquid; Al in described mixed reaction liquid 2 o 3 :P 2 o 5 : SiO 2 : Chromium Nitrate: Triethylamine: n-Propylamine: H 2 The molar ratio of O is 0.7:0.7:0.25:0.15:2.5:0.5:50;

[0036] 2) Mix the obtained mixed reaction liquid evenly, put it into a high-temperature reactor, pre-crystallize at 170°C for 8 hours, then raise the temperature to 200°C for crystallization for 8 hours, centrifuge the mixed reaction liquid to obtain a filter cake, and filter the obtained The cake is mixed with silica sol and kaolin in a certain proportion to prepare the MTO catalyst;

[0037] 3) Ca...

Embodiment 2

[0040] Such as figure 2 Shown, the preparation method that contains the catalyst of modified SAPO-34 molecular sieve, comprises the following steps:

[0041] 1) Mix pseudo-boehmite with water evenly, then add deionized water, 85% by weight orthophosphoric acid, triethylamine, silica sol, chromium nitrate, n-propylamine in turn, and stir at 20-30°C for 2 Mix evenly in one hour, obtain mixed reaction liquid; Al in described mixed reaction liquid 2 o 3 :P 2 o 5 : SiO 2 : Chromium salt: Triethylamine: n-Propylamine: H 2 The molar ratio of O is 1:1:0.25:0.15:2.5:0.5:50;

[0042]2) Mix the obtained mixed reaction liquid evenly, put it into a high-temperature reactor, pre-crystallize at 170°C for 8 hours, then raise the temperature to 200°C for crystallization for 8 hours, centrifuge the mixed reaction liquid to obtain a filter cake, and filter the obtained The cake is mixed with silica sol and kaolin in a certain proportion to prepare the MTO catalyst;

[0043] 3) Calcining...

Embodiment 3

[0046] Such as image 3 Shown, the preparation method that contains the catalyst of modified SAPO-34 molecular sieve, comprises the following steps:

[0047] 1) Mix pseudo-boehmite with water evenly, then add deionized water, 85% by weight orthophosphoric acid, triethylamine, silica sol, chromium nitrate, n-propylamine in turn, and stir at 20-30°C for 2 Mix evenly for 1 hour to obtain a mixed reaction solution; in the mixed reaction solution, Al2O3: P2O5: SiO2: chromium salt: triethylamine: n-propylamine: H2O The molar ratio is 1:1:0.25:0.2:2:1:50;

[0048] 2) Mix the obtained mixed reaction liquid evenly, put it into a high-temperature reactor, pre-crystallize at 170°C for 8 hours, then raise the temperature to 200°C for crystallization for 8 hours, centrifuge the mixed reaction liquid to obtain a filter cake, and filter the obtained The cake is mixed with silica sol and kaolin in a certain proportion to prepare the MTO catalyst;

[0049] 3) Calcining the prepared catalyst ...

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Abstract

A preparing method of a catalyst containing a modified SAPO-34 molecular sieve is disclosed. The method includes S01) fully mixing an aluminum source and water, then adding deionized water, a phosphorus source, a first template, a silicone source, a chromium salt and a second template in order, and stirring the mixture at 20-30 DEG C for 1-2 h to fully mix the materials to obtain a mixed reactionliquid, with the mole ratio of the aluminum source, the phosphorus source, the silicon source, the chromium salt, the first template, the second template and the water being (0.7-1.5):(0.7-1.5):(0.1-0.4):(0.1-0.4):(0.5-2.5):(0.5-2.5):(50-70). The invention also discloses application of the method in MTO reactions. The method can reduce carbon deposition of the catalyst, can improve diffusion ability of the catalyst and can improve diene selectivity.

Description

technical field [0001] The invention relates to a preparation method and application of a catalyst containing modified SAPO-34 molecular sieve, belonging to the technical field of catalysts. Background technique [0002] Among the many olefin compounds, ethylene and propylene are the simplest two small molecular olefins, and their applications are spread across various fields of the national economy and people's livelihood. Therefore, the production technology and productivity of ethylene and propylene are a measure of a country's petrochemical technology development level and industrial development level important sign. In recent years, the industrial application of methanol to olefins technology (MTO) has injected new vitality into the production technology of ethylene and propylene. Since this technology can get rid of the dependence of olefin production on petroleum resources, it is especially suitable for my country's national conditions of rich coal, poor oil and littl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 周彤程鸿魁郝伟李元东王闯袁龙姜叶葳
Owner CHIA TAI ENERGY MATERIALS DALIAN
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