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Doped copper silicate nanotube catalyst for methyl acetate hydrogenation as well as preparation method and application of doped copper silicate nanotube catalyst

A technology of methyl acetate and catalyst, which is applied in the field of doped copper silicate nanotube catalyst and its preparation, can solve the problems of low conversion rate of ethylene per pass, push up the price of grain, and high product cost, so as to reduce equipment investment cost, Strong tolerance, the effect of reducing production energy consumption

Active Publication Date: 2021-03-19
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following problems: (1) The problem of "competition with the people for food" occurs, and the development of this path may push up food prices
(2) The process is long, the equipment investment is high, and the product cost is high
Moreover, the single-pass conversion rate of ethylene is low (about 5%). In order to improve economic benefits, ethylene is often recycled, but this process will produce by-products such as ether and butene.

Method used

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  • Doped copper silicate nanotube catalyst for methyl acetate hydrogenation as well as preparation method and application of doped copper silicate nanotube catalyst
  • Doped copper silicate nanotube catalyst for methyl acetate hydrogenation as well as preparation method and application of doped copper silicate nanotube catalyst
  • Doped copper silicate nanotube catalyst for methyl acetate hydrogenation as well as preparation method and application of doped copper silicate nanotube catalyst

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Experimental program
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Effect test

Embodiment 1

[0038] 1. a doped copper silicate nanotube catalyst of methyl acetate hydrogenation, comprising carrier, main catalyst and cocatalyst, described carrier is silicon dioxide, and main catalyst is the oxide compound of Cu, and cocatalyst is rare earth element Oxides of Ce; the main catalyst accounts for 30% of the mass of the carrier, and the cocatalyst accounts for 5% of the mass of the carrier.

[0039] 2. the preparation method of described catalyst, comprises the following steps:

[0040] (1) Add 4.95g of copper nitrate trihydrate and 4.58g of ammonium chloride into 120mL of water to form an aqueous solution, add 28wt% ammonia water dropwise to the pH of the solution to 9.5, stir at room temperature for 0.5h, and form a blue suspension;

[0041] (2) Slowly add 1.728 g of silica sol dropwise to the blue suspension, and stir at room temperature for 1 hour to form a blue colloidal solution;

[0042] (3) Hydrothermal crystallization at 200°C for 40 hours;

[0043] (4) After coo...

Embodiment 2

[0048] 1. a doped copper silicate nanotube catalyst of methyl acetate hydrogenation, comprising carrier, main catalyst and cocatalyst, described carrier is silicon dioxide, and main catalyst is the oxide compound of Cu, and cocatalyst is rare earth element Oxides of La; the main catalyst accounts for 30% of the mass of the carrier, and the cocatalyst accounts for 3% of the mass of the carrier.

[0049] 2. the preparation method of described catalyst, comprises the following steps:

[0050] (1) Add 4.95g of copper nitrate trihydrate and 4.58g of ammonium chloride into 120mL of water to form an aqueous solution, add 28 wt% ammonia water dropwise to the pH of the solution to 9.5, stir at room temperature for 0.5h, and form a blue suspension ;

[0051] (2) Slowly add 1.728 g of silica sol dropwise to the blue suspension, and stir at room temperature for 1 hour to form a blue colloidal solution;

[0052] (3) Hydrothermal crystallization at 200°C for 40 hours;

[0053] (4) After ...

Embodiment 3

[0058] 1. a doped copper silicate nanotube catalyst of methyl acetate hydrogenation, comprising carrier, main catalyst and cocatalyst, described carrier is silicon dioxide, and main catalyst is the oxide compound of Cu, and cocatalyst is alkaline earth metal Oxides of Sr; the main catalyst accounts for 35% of the mass of the carrier, and the cocatalyst accounts for 5% of the mass of the carrier.

[0059] 2. the preparation method of described catalyst, comprises the following steps:

[0060] (1) Add 5.78g of copper nitrate trihydrate and 5.34g of ammonium chloride into 120mL of water to form an aqueous solution, add 28 wt% ammonia water dropwise to the pH of the solution to 9.5, stir at room temperature for 0.5h, and form a blue suspension ;

[0061] (2) Slowly add 1.728 g of silica sol dropwise to the blue suspension, and stir at room temperature for 1 hour to form a blue colloidal solution;

[0062] (3) Hydrothermal crystallization at 200°C for 40 hours;

[0063] (4) Afte...

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Abstract

The invention provides a doped copper silicate nanotube catalyst for methyl acetate hydrogenation, which comprises a carrier, a main catalyst and a cocatalyst, wherein the carrier is silicon dioxide,the main catalyst is oxide of Cu, the cocatalyst is oxide of metal X, and the metal X is one of alkali metal, alkaline earth metal or rare earth element; the main catalyst accounts for 30-40% of the mass of the carrier, and the cocatalyst accounts for 0.5-10% of the mass of the carrier. Meanwhile, the invention also provides a preparation method of the catalyst and application of the catalyst in preparation of ethanol through hydrogenation of methyl acetate. The catalyst provided by the invention has a tubular morphology structure and good stability, can maintain a conversion rate of 92% or above of methyl acetate and ethanol selectivity of 95% or above under the conditions of a low hydrogen-ester ratio, a methyl acetate liquid phase space velocity of 0.5-1 and a low reaction temperature of 235 DEG C, and greatly reduces the equipment investment cost.

Description

technical field [0001] The invention belongs to the technical field of methyl acetate hydrogenation catalysts, and in particular relates to a doped copper silicate nanotube catalyst for hydrogenation of methyl acetate and its preparation method and application. Background technique [0002] With the continuous development of the economy, people's demand for energy is also increasing day by day, resulting in the phenomenon that the supply exceeds the demand, and the energy competition among countries is also becoming more and more fierce. In the structure of primary energy consumption, fossil energy plays a major role, and in 2016, my country's primary energy consumption accounted for 23% of the total global consumption. Therefore, the adjustment of my country's energy structure plays an important role in the planning and layout of the world's future energy. . As a new type of alternative clean energy, ethanol can not only be directly used as a fuel, but also be used as an ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/78B01J35/10B01J37/03B01J37/10B01J37/02B01J37/08C07C29/149C07C31/08
CPCB01J23/83B01J23/78B01J23/002B01J37/038B01J37/10B01J37/0201B01J37/088B01J37/082C07C29/149B01J2523/00B01J35/23B01J35/399B01J35/635B01J35/638B01J35/647B01J35/69B01J35/615B01J2523/17B01J2523/3712B01J2523/41B01J2523/3706B01J2523/24B01J2523/13B01J2523/23C07C31/08Y02P20/52
Inventor 任志恒张伟
Owner SHAANXI YANCHANG PETROLEUM GRP
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