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Method for preparing ethylene glycol through photocatalytic conversion of methanol

A technology of methanol conversion and ethylene glycol, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds, etc., can solve problems that limit the practical application of ethylene glycol, and achieve energy friendliness, low environmental pollution, and simple process Effect

Active Publication Date: 2021-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the practical application of methanol conversion to ethylene glycol is limited

Method used

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  • Method for preparing ethylene glycol through photocatalytic conversion of methanol
  • Method for preparing ethylene glycol through photocatalytic conversion of methanol
  • Method for preparing ethylene glycol through photocatalytic conversion of methanol

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Experimental program
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Effect test

Embodiment 1

[0027] ZnSO 4 ·7H 2 O (1.0mmol, 287.6mg), InCl 3 4H 2 O (2.0mmol, 576.5mg) and NaCl (211.5mg) were added to an Erlenmeyer flask containing absolute ethanol, magnetically stirred at room temperature for 30min, and then thioacetamide (601.0mg) was added to the above mixture. After stirring for an additional 30 min, the mixture was transferred to a clean 50 mL Teflon-lined autoclave. After sealing, solvothermal reaction at 160°C for 20h. After the reaction, the autoclave was naturally cooled to room temperature. The reacted solid was separated by centrifugation and washed three times with absolute ethanol (25 mL), twice with ultrapure water (25 mL), and finally washed once with absolute ethanol. The obtained yellow solid was dried under vacuum at 60 °C for 12 h.

[0028] In a 220mL quartz pressure-resistant glass reactor, add 50mL of anhydrous methanol and 100mg of ZnIn 2 S 4 catalyst, and then replace the reactor with 5% volume fraction of CO / Ar and seal it. Under the l...

Embodiment 2

[0030] Solvothermal Preparation of ZnIn Using Isopropanol 2 S 4 / SiO 2 -40 catalyst. where 40 represents ZnIn 2 S 4 The mass of SiO 2 40% of the mass. SiO 2 (30 nm, hydrophilic) was dispersed in 30 mL of isopropanol and stirred for 2 h. ZnSO 4 ·7H 2 O (0.47mmol, 136.0mg), InCl 3 4H 2 O (0.95mmol, 277.2mg) and NaCl (100mg) were added to the above-mentioned isopropanol dispersion, and after magnetic stirring at room temperature for 30min, thioacetamide (284.2mg) was added. After stirring for an additional 30 min, the mixture was transferred to a clean 50 mL Teflon-lined autoclave. After sealing, solvothermal reaction was carried out in a rotary oven at 160° C. for 20 h. After the reaction, the autoclave was naturally cooled to room temperature. The reacted solid was separated by centrifugation and washed three times with absolute ethanol (25 mL), twice with ultrapure water (25 mL), and finally washed once with absolute ethanol. The obtained pale yellow solid was d...

Embodiment 3

[0033] Solvothermal Preparation of Zn Using Isopropanol 2 In 2 S 5 / SiO 2 -40 catalyst. where 40 represents Zn 2 In 2 S 5 The mass of SiO 2 40% of the mass. 500mg of SiO 2 (30 nm, hydrophilic) was dispersed in 30 mL of isopropanol and stirred for 2 h. ZnSO 4 ·7H 2 O (0.77mmol, 220.9mg), InCl 3 4H 2 O (0.77mmol, 225.2mg) and NaCl (100mg) were added to the above-mentioned isopropanol dispersion, and after magnetic stirring at room temperature for 30min, thioacetamide (288.6mg) was added. After stirring for an additional 30 min, the mixture was transferred to a clean 50 mL Teflon-lined autoclave. After sealing, solvothermal reaction was carried out in a rotary oven at 160° C. for 20 h. After the reaction, the autoclave was naturally cooled to room temperature. The reacted solid was separated by centrifugation and washed three times with absolute ethanol (25 mL), twice with ultrapure water (25 mL), and finally washed once with absolute ethanol. The obtained pale y...

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Abstract

The invention relates to a method for preparing ethylene glycol through photocatalytic conversion of methanol, and relates to ethylene glycol and photocatalysts. According to the method, methanol is taken as a raw material and is directly converted into ethylene glycol and H2 at room temperature under the action of a solid photocatalyst; and the method comprises the following reaction processes: adding methanol and a catalyst into a pressure-resistant glass container, carrying out normal-temperature visible light or ultraviolet light illumination stirring reaction, and reacting for a certain time to obtain ethylene glycol and H2. According to the invention, the method has universality and can be expanded to other photocatalytic systems, and the light quantum yield of the main product ethylene glycol is 2.5 times or more than 2.5 times of the light quantum yield of the main product ethylene glycol under the same wavelength reported by current literatures and patents.

Description

technical field [0001] The invention relates to a method for photocatalyzing methanol conversion to prepare ethylene glycol, in particular to converting methanol into ethylene glycol through the action of a photocatalyst and simultaneously producing hydrogen by-product. Background technique [0002] Ethylene glycol is an important chemical basic raw material. Ethylene glycol can be used as antifreeze, plasticizer, and can also be polymerized into polyester fibers. my country is the largest consumer of ethylene glycol in the world, and the annual consumption of ethylene glycol is gradually increasing. There are mainly two routes for the synthesis of ethylene glycol, namely the petroleum route and the coal chemical route. The starting material for the petroleum route is ethylene. Ethylene is epoxidized to obtain ethylene oxide, and ethylene oxide is catalyzed to hydrate to obtain ethylene glycol. The hydration reaction of ethylene oxide consumes a lot of water, and diethyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/34C07C31/20C01B3/22B01J35/00B01J27/24B01J27/04
CPCC07C29/34C01B3/22B01J27/04B01J27/24C01B2203/0277C01B2203/06B01J35/39C07C31/202Y02P20/52
Inventor 王峰罗能超高著衍刘诗阳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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