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MTO (methanol to olefin) catalyst carrier preparation method

A catalyst carrier, silver oxide technology, applied in the direction of catalyst carrier, catalyst, molecular sieve catalyst, etc., can solve the problems of easy deactivation life, low olefin yield, many by-products, etc., and achieves short crystallization time, significant economic benefits, simple method effect

Active Publication Date: 2015-09-09
ANHUI KECHANG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The key to MTO technology is the development of high-performance catalysts. The early research on MTO catalysts mainly focused on medium-pore molecular sieves such as ZSM-5. The medium-to-large pore structure of ZSM-5 makes it have the advantages of low carbon and long life. Due to its strong acidity, it also has the disadvantages of low olefin yield and many by-products.
In 1984, UCC invented SAPO-34 molecular sieve for MTO reaction. Its smaller pore size and larger specific surface area accelerated the MTO reaction rate and improved the selectivity of the reaction, but it had high carbon deposition, easy deactivation and Disadvantages such as short life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this embodiment, the preparation method of nano-modified ZSM-5 / AlPO4-34 composite molecular sieve specifically includes the following steps:

[0021] (1) Add the mixed powder of silicon dioxide, titanium dioxide and silver oxide with a particle size of 40-50nm into the container, wherein the mass ratio of silicon dioxide, titanium dioxide and silver oxide is 2.8:2:1.6, and then add poly Mixed solution of vinyl alcohol and water, stirred and dispersed at room temperature for 60 minutes, then added silane coupling agent KH550 and acid, wherein the molar ratio of KH550 to acid was 1:1, stirred and reacted at 70°C for 5h, then cooled to room temperature, filtered, and obtained Nano-modified composite powder;

[0022] (2) According to the molar ratio of (aluminum isopropoxide + aluminum oxide): orthophosphoric acid: (piperidine + pyridine): hydrofluoric acid: deionized water = 1:1.0:0.5:0.1:50 to take each component, the Add aluminum isopropoxide and alumina stone into d...

Embodiment 2

[0026] In this embodiment, the preparation method of nano-modified ZSM-5 / AlPO4-34 composite molecular sieve specifically includes the following steps:

[0027] (1) Add the mixed powder of silicon dioxide, titanium dioxide and silver oxide with a particle size of 40-50nm into the container, wherein the mass ratio of silicon dioxide, titanium dioxide and silver oxide is 2.8:2:1.6, and then add poly Mixed solution of vinyl alcohol and water, stirred and dispersed at room temperature for 60 minutes, then added silane coupling agent KH550 and acid, wherein the molar ratio of KH550 to acid was 1:1, stirred and reacted at 70°C for 5h, then cooled to room temperature, filtered, and obtained Nano-modified composite powder;

[0028] (2) According to the molar ratio of (aluminum hydroxide + pseudoboehmite): orthophosphoric acid: (morpholine + pyridine): hydrofluoric acid: deionized water = 1: 1.2: 1: 0.15: 200 to take each component , adding aluminum hydroxide and pseudo-boehmite into d...

Embodiment 3

[0032] In this embodiment, the preparation method of nano-modified ZSM-5 / AlPO4-34 composite molecular sieve specifically includes the following steps:

[0033] (1) Add the mixed powder of silicon dioxide, titanium dioxide and silver oxide with a particle size of 40-50nm into the container, wherein the mass ratio of silicon dioxide, titanium dioxide and silver oxide is 2.8:2:1.6, and then add poly Mixed solution of vinyl alcohol and water, stirred and dispersed at room temperature for 60 minutes, then added silane coupling agent KH550 and acid, wherein the molar ratio of KH550 to acid was 1:1, stirred and reacted at 70°C for 5h, then cooled to room temperature, filtered, and obtained Nano-modified composite powder;

[0034] (2) According to the molar ratio (aluminum isopropoxide + pseudoboehmite): orthophosphoric acid: (piperidine + pyridine): hydrofluoric acid: deionized water = 1: 1.5: 2: 0.2: 300 to take each group Separately, add aluminum isopropoxide and pseudo-boehmite i...

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Abstract

The invention aims to provide an MTO (methanol to olefin) catalyst carrier preparation method. The method particularly includes the steps of preparing nano-modified composite powder, uniformly mixing and stirring aluminum sources, a phosphorus source, water, ZSM-5 raw powder and the nano-modified composite powder, sequentially adding a template agent and hydrofluoric acid to obtain molecular sieve synthesis gel, subjecting the molecular sieve synthesis gel to crystallizing treatment, and recovering to obtain a crystallized product, namely, a ZSM-5 / AlPO4-34 composite molecular sieve which serves as an MTO catalyst carrier. The ZSM-5 / AlPO4-34 composite molecular sieve preparation method is simple, short in crystallizing time, applicable to large-scale production and remarkable in economical benefit. The ZSM-5 / AlPO4-34 composite molecular sieve prepared by the method is capable of improving reaction selectivity and catalytic efficiency when applied to MTO reaction.

Description

technical field [0001] The invention relates to a method for preparing an MTO catalyst carrier, belonging to the technical field of chemical synthesis. Background technique [0002] MTO (Methanol To Olefin) refers to the chemical process technology of producing low-carbon olefins (ethylene and propylene) from methanol, and has found a new raw material route for olefin production. The production of olefins from methanol instead of petroleum can not only free the price of olefins from the influence of petroleum products, but also reduce my country's excessive dependence on petroleum resources. [0003] The key to MTO technology is the development of high-performance catalysts. The early research on MTO catalysts mainly focused on medium-pore molecular sieves such as ZSM-5. The medium-to-large pore structure of ZSM-5 makes it have the advantages of low carbon and long life. Because of its strong acidity, it also has the disadvantages of low olefin yield and many by-products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J29/83
CPCB01J29/005B01J29/44B01J29/80B01J29/83B01J29/85B01J37/0009B01J2229/18B01J2229/20C07C1/20C07C2529/80C07C11/04C07C11/06Y02P20/52Y02P30/20Y02P30/40
Inventor 宣乐
Owner ANHUI KECHANG MACHINERY MFG