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Method for preparing silicon modified carrier and desoxidant prepared from carrier and desoxidant preparation method

A technology of silicon modification and deoxidizer, applied in catalyst carriers, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as evaporation, avoid falling off, and ensure the content of silicon. Effect

Active Publication Date: 2018-01-16
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the silicon-containing substance loaded on the surface of the carrier is easily evaporated during calcination when the carrier is modified with silicon, thereby providing a method that can effectively control the silicon content. Method for preparing silicon-modified carrier by evaporating silicon substance, deoxidizer prepared from the carrier and method for preparing the deoxidizer

Method used

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  • Method for preparing silicon modified carrier and desoxidant prepared from carrier and desoxidant preparation method
  • Method for preparing silicon modified carrier and desoxidant prepared from carrier and desoxidant preparation method

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Embodiment 1

[0035] This embodiment provides a method for preparing a silicon-modified carrier, which includes the following steps:

[0036] (1) Mix absolute ethanol, deionized water and ethyl orthosilicate according to the molar ratio of 3:3:1, heat it to 50°C, and stir to obtain an alcohol solution of ethyl orthosilicate;

[0037] According to the mass of silicon contained in the tetraethyl orthosilicate alcohol solution, it is γ-Al 2 o 3 The amount of 3% by mass, the γ-Al 2 o 3 Add it into tetraethyl silicate alcohol solution, hydrolysis and polycondensation at 40°C for 1.5h, and then filter off the liquid to obtain the first prefabricated carrier, in which γ-Al 2 o 3 The particle size is 1mm;

[0038] (2) Mix xylene, methyl ethyl ketone, n-butanol and E44 epoxy resin according to the mass ratio of 2:1:1:0.2, and stir evenly to obtain an epoxy resin solution. The mass of the resin is 4% of the mass of the first prefabricated carrier, the first prefabricated carrier is added to the...

Embodiment 2

[0042] This embodiment provides a method for preparing a silicon-modified carrier, which includes the following steps:

[0043] (1) Mix absolute ethanol, deionized water and ethyl orthosilicate in a molar ratio of 5:4:1, then heat to 40°C and stir to obtain an alcohol solution of ethyl orthosilicate, and then The mass of silicon contained in ethyl acetate alcohol solution is η-Al 2 o 3 0.5% of the mass, the η-Al 2 o 3Add it to tetraethyl silicate alcohol solution, hydrolyze and polycondense for 1.5h at a temperature of 50°C, and then filter off the liquid to obtain the first prefabricated carrier, in which η-Al 2 o 3 The particle size is 3mm;

[0044] (2) Mix xylene, methyl ethyl ketone, n-butanol and E44 epoxy resin according to the mass ratio of 3:1:1:0.1, and stir evenly to obtain an epoxy resin solution. According to the epoxy resin contained in the epoxy resin solution, The mass of the resin is 2% of the mass of the first prefabricated carrier, the first prefabricat...

Embodiment 3

[0047] This embodiment provides a method for preparing a silicon-modified carrier, which includes the following steps

[0048] (1) Mix absolute ethanol, deionized water and ethyl orthosilicate in a molar ratio of 3:5:1, and stir to obtain an alcohol solution of ethyl orthosilicate, and then use the alcohol solution of ethyl orthosilicate The mass containing silicon is θ-Al 2 o 3 7% of the mass, the θ-Al 2 o 3 Add it to tetraethyl silicate alcohol solution, hydrolyze and polycondense for 1.5h, and then filter off the liquid to obtain the first prefabricated carrier, in which θ-Al 2 o 3 The particle size is 2mm;

[0049] (2) Mix xylene, methyl ethyl ketone, n-butanol and E44 epoxy resin according to the mass ratio of 3:1:1:0.4, and stir evenly to obtain an epoxy resin solution. According to the epoxy resin contained in the epoxy resin solution, The mass of the resin is 5% of the mass of the first prefabricated carrier, the first prefabricated carrier is added to the epoxy ...

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Abstract

The invention provides a method for preparing a silicon modified carrier and an desoxidant prepared from the carrier and a desoxidant preparation method. The invention adopts the key point that tetraethoxysilane supported by a carrier precursor is subjected to a hydrolysis condensation polymerization reaction under an acid condition, so that the efficiency of hydrolysis condensation polymerizationof the tetraethoxysilane is greatly improved; in addition, a first prefabricated carrier with a hydrolysis condensation polymerization product of the tetraethoxysilane is soaked in an epoxy resin solution, then the hydrolysis condensation polymerization product of the tetraethoxysilane is subjected to a copolymerization reaction on the carrier precursor, and a formed copolymer, namely an epoxy silicate ester, can be directly supported by the carrier precursor. By adopting the method, the molecular weight of silicon-containing substances supported by the carrier precursor is increased, the evaporation amount of the silicon-containing substances in the roasting process is reduced, and the defect that a macromolecule silicon-containing substance is not easily supported by the carrier precursor is solved.

Description

technical field [0001] The invention relates to the technical field of carrier modification, and belongs to a method for preparing silicon-modified alumina by modifying alumina with orthosilicate, and a method for preparing a deoxidizer by using a silicon-modified carrier. Background technique [0002] Alumina supports have been widely used in the field of adsorption and supported catalysts due to their porous surface, large specific surface area and high hardness. After research, it has been found that the catalytic activity of the active components loaded on it can be improved by modifying alumina through silicon, mainly because the addition of silicon can change the configuration and number of hydroxyl groups on the surface of alumina, while Si 4+ It is a highly electron-deficient structure, which can regulate the type of acidity and the number of acid centers on the surface of alumina, thereby changing the dispersion state of the active components on the surface of the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/34B01J32/00B01J21/08B01J27/10B01J27/24B01J23/44
Inventor 王春艳李新成峻青
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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