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Ethanol synthetic acetic acid catalyst and preparation method thereof, and preparation method of acetic acid

A catalyst and ethanol technology, applied in the direction of catalyst activation/preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of low acetic acid yield, large amount of catalyst, low catalytic activity, etc., and achieve good catalytic performance, excellent The effect of catalytic performance, good application prospects and potential for industrial production and application

Active Publication Date: 2018-06-08
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But on the whole, there are still relatively few studies on the catalysts used in the oxidation of ethanol to acetic acid, and there are still some defects in the reaction in a few studies, such as excessive catalyst usage, low catalytic activity, low acetic acid yield, etc. , which still needs to be further studied and improved

Method used

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  • Ethanol synthetic acetic acid catalyst and preparation method thereof, and preparation method of acetic acid
  • Ethanol synthetic acetic acid catalyst and preparation method thereof, and preparation method of acetic acid
  • Ethanol synthetic acetic acid catalyst and preparation method thereof, and preparation method of acetic acid

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Effect test

Embodiment 1

[0039] Embodiment 1: Preparation of acetic acid catalyst by ethanol oxidation

[0040] S1: pretreating the carbon nanotubes to obtain pretreated carbon nanotubes; the steps are as follows:

[0041] Multi-walled carbon nanotubes (purchased from Shenzhen Nanometer Port Co., Ltd., with an outer diameter of 20-40 nm, a length of 5-15 μm, and a specific surface area of ​​80-140 m 2 / g) placed in concentrated nitric acid with an appropriate mass percent concentration of 66%, fully stirred at room temperature at 25°C for 60 minutes, then warmed up to 120°C and refluxed at this temperature for 6 hours, filtered, and fully washed with deionized water Filtrate until the eluate is neutral, and then completely vacuum-dry at 80°C to obtain the pretreated carbon nanotubes;

[0042] S2: Treat the pretreated carbon nanotubes with an aqueous hydrogen peroxide solution to obtain hydrogen peroxide-treated carbon nanotubes; the steps are as follows:

[0043] At room temperature, the pretreated ...

Embodiment 2

[0050] Embodiment 2: Preparation of acetic acid catalyst by ethanol oxidation

[0051] S1: pretreating the carbon nanotubes to obtain pretreated carbon nanotubes; the steps are as follows:

[0052] Multi-walled carbon nanotubes (purchased from Shenzhen Nanometer Port Co., Ltd., with an outer diameter of 20-40 nm, a length of 5-15 μm, and a specific surface area of ​​80-140 m 2 / g) placed in an appropriate amount of concentrated nitric acid with a concentration of 70% by mass, fully stirred at room temperature at 25°C for 50 minutes, then heated to 120°C and refluxed at this temperature for 6 hours, filtered, and fully washed with deionized water Filtrate until the eluate is neutral, and then completely vacuum-dry at 80°C to obtain the pretreated carbon nanotubes;

[0053] S2: Treat the pretreated carbon nanotubes with an aqueous hydrogen peroxide solution to obtain hydrogen peroxide-treated carbon nanotubes; the steps are as follows:

[0054] At room temperature, the pretrea...

Embodiment 3

[0061] Embodiment 3: Preparation of acetic acid catalyst by ethanol oxidation

[0062] S1: pretreating the carbon nanotubes to obtain pretreated carbon nanotubes; the steps are as follows:

[0063] Multi-walled carbon nanotubes (purchased from Shenzhen Nanometer Port Co., Ltd., with an outer diameter of 20-40 nm, a length of 5-15 μm, and a specific surface area of ​​80-140 m 2 / g) placed in concentrated nitric acid with an appropriate mass percent concentration of 68%, fully stirred at room temperature at 25°C for 55 minutes, then heated to 120°C and refluxed at this temperature for 6 hours, filtered, and fully washed with deionized water Filtrate until the eluate is neutral, and then completely vacuum-dry at 80°C to obtain the pretreated carbon nanotubes;

[0064] S2: Treat the pretreated carbon nanotubes with an aqueous hydrogen peroxide solution to obtain hydrogen peroxide-treated carbon nanotubes; the steps are as follows:

[0065] At room temperature, the pretreated car...

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Abstract

The invention relates to a preparation method of an ethanol synthetic acetic acid catalyst. The preparation method of the ethanol synthetic acetic acid catalyst comprises the following steps: S1, performing pretreatment on a carbon nanotube to obtain a pretreated carbon nanotube; S2, treating the pretreated carbon nanotube by a hydrogen peroxide aqueous solution to obtain a hydrogen peroxide treated carbon nanotube; S3, preparing a mixed aqueous solution of H2PtCl6*6H2O and PdCl2, adding the hydrogen peroxide treated carbon nanotube into the mixture aqueous solution, performing ultrasonic treatment and completely drying to obtain a catalyst precursor; and S4, performing step-type two-stage process heating calcining treatment on the catalyst precursor under reducing atmosphere and inert atmosphere to obtain the catalyst. According to the preparation method and through various unique preparation steps as well as selection and determination of various unique technical characteristics in various steps, so that the ethanol synthetic acetic acid catalyst with excellent performance can be obtained, and a brand new catalyst with high properties is provided for preparation of the acetic acid by the ethanol.

Description

technical field [0001] The present invention relates to a kind of catalyst and its preparation method and its application, more particularly relate to a kind of ethanol synthetic acetic acid catalyst (that is, the catalyst used for synthesizing acetic acid from ethanol, hereinafter referred to as "ethanol synthetic acetic acid catalyst") and its preparation method and A method for preparing acetic acid belongs to the technical fields of catalyst technology and acetic acid preparation. Background technique [0002] In the field of chemical technology, acetic acid is a very important organic chemical raw material with a wide range of uses, and can be used to produce various follow-up chemical substances such as vinyl acetate monomer, acetic anhydride, terephthalic acid, acetate esters, and cellulose acetate. Especially, with the rapid development of terephthalic acid and acetic acid downstream products, ethylene production has become an important part of the chemical industry ...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J37/34B01J37/18B01J37/08C07C51/235C07C53/08
CPCB01J23/44B01J37/08B01J37/18B01J37/343C07C51/235C07C53/08
Inventor 李锋李翠勤宋华张娇静张志秋吴红军蒋珊珊朱文晰
Owner NORTHEAST GASOLINEEUM UNIV
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