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Method for coupling preparing ethylene glycol by photocatalyzing formaldehyde and methanol

A technology of ethylene glycol and photocatalyst, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of low activity and selectivity of methanol and formaldehyde, and achieve high atomic economy and reaction conditions. Gentle, low-cost effect

Inactive Publication Date: 2018-09-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of reaction performance, the activity and selectivity of photocatalytic methanol and formaldehyde are relatively low

Method used

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  • Method for coupling preparing ethylene glycol by photocatalyzing formaldehyde and methanol
  • Method for coupling preparing ethylene glycol by photocatalyzing formaldehyde and methanol

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Embodiment 1

[0035] Titanium dioxide (Degussa P25) was uniformly dispersed in 25 ml of deionized water. Then 6mL H 2 PtCl 6 (0.01g / mL) solution was added dropwise to the above slurry at a constant speed. The above solution was sonicated in an ultrasonic machine for 5 minutes, and then stirred at room temperature (25° C.) for one hour. The above samples were dried in a vacuum oven at 60°C. After drying, the samples were taken out for grinding. Take 1.5 g of the above catalyst precursor and reduce it at 300° C. for 3 hours under a hydrogen (99.99%) atmosphere, wherein the hydrogen flow rate is 100 mL / min. After the reduction, argon gas (99.99%) was introduced to cool down to room temperature, and then the catalyst was taken out, the noble metal Pt-supported titanium dioxide, the Pt loading was 0.44wt%, and the average particle diameter of Pt particles was 4nm. Disperse 5mg of solid catalyst in 2mL of methanol, then add 1mL of standard formaldehyde solution (formaldehyde concentration is...

Embodiment 2

[0037] Titanium dioxide (Degussa P25) was uniformly dispersed in 25 ml of deionized water. Then 10mlPdCl 2 solution (0.007g / mL) was added dropwise to the above slurry at a constant speed. The above solution was sonicated in an ultrasonic machine for 5 minutes, and then stirred at room temperature (25° C.) for one hour. The above samples were dried in a vacuum oven at 60°C. After drying, the samples were taken out for grinding. 1.5 g of the above catalyst precursor was taken and reduced at 300° C. for 3 hours under a hydrogen (99.99%) atmosphere, wherein the hydrogen flow rate was 100 mL / min. After the reduction, argon gas (99.99%) was introduced to cool down to room temperature, and then the catalyst was taken out, the noble metal Pd-supported titanium dioxide, the Pd loading was 0.48wt%, and the average particle size of Pd particles was 4nm. Disperse 5mg of solid catalyst in 2mL of methanol, then add 1mL of standard formaldehyde solution (formaldehyde concentration is 10m...

Embodiment 3

[0039] Titanium dioxide (Degussa P25) was uniformly dispersed in 25 ml of deionized water. Then 12mlRuCl 3 solution (0.008g / mL) was added dropwise to the above slurry at a constant speed. The above solution was sonicated in an ultrasonic machine for 5 minutes, and then stirred at room temperature (25° C.) for one hour. The above samples were dried in a vacuum oven at 60°C. After drying, the samples were taken out for grinding. Take 1.5 g of the above catalyst precursor and reduce it at 300° C. for 3 hours under a hydrogen (99.99%) atmosphere, wherein the hydrogen flow rate is 100 mL / min. After the reduction, argon gas (99.99%) was introduced to cool down to room temperature, and then the catalyst was taken out, the noble metal Ru supported titanium dioxide, the Ru loading was 0.48wt%, and the average particle diameter of Ru particles was 2nm. Disperse 5mg of solid catalyst in 2mL of methanol, then add 1mL of standard formaldehyde solution (formaldehyde concentration is 10m...

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Abstract

The invention discloses a method for coupling preparing ethylene glycol by photocatalyzing formaldehyde and methanol. The methanol and the formaldehyde have photocatalytic reaction in the presence ofa light catalyst to prepare the ethylene glycol. For a photocatalytic coupling system, the generation rate of the ethylene glycol can be apparently improved in an independent methanol or formaldehydesystem, the method is mild in reaction condition, the process flow is simple, the cost is low, the atom economical performance is high, and the green and chemical development requirement can be met.

Description

technical field [0001] The invention belongs to the technical field of ethylene glycol preparation, and in particular relates to a method for preparing ethylene glycol by coupling photocatalyzed formaldehyde and methanol. Background technique [0002] Ethylene glycol is a very important organic chemical and chemical intermediate, which is widely used in energy, plastics, automobiles, chemicals and other industries. Traditional industrial methods for preparing ethylene glycol are mainly divided into two categories: petroleum route and non-petroleum route. Among them, the petroleum route is mainly to obtain ethylene glycol through the direct hydration of ethylene oxide, and its ethylene oxide comes from the oxidation of ethylene from petroleum cracking. With the increasing demand for ethylene glycol from human beings and society, the direct or indirect preparation of ethylene glycol from syngas has attracted more and more attention. In 1947, DoPont used a cobalt-based cataly...

Claims

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Application Information

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IPC IPC(8): C07C29/38C07C31/20
CPCC07C29/38C07C31/202
Inventor 范永辉鲍静娴钟良枢石志彪刘洪江
Owner SHANGHAI UNIV
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