A kind of heteropoly acid salt solid catalyst and its preparation method and application

A technology of solid catalyst and heteropoly acid salt, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, etc. It can solve the problems of poor catalytic performance and achieve good stability, high yield and good catalytic performance Effect

Active Publication Date: 2021-04-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a heteropoly acid salt solid catalyst and its preparation method and application, which solves the problem that when the existing catalyst catalyzes the production of methyl lactate from biomass resources, the biomass resources are relatively simple monosaccharides or oligosaccharides, And catalytic performance is poor, there is no technical problem that a catalyst can better catalyze polysaccharides such as cellulose to produce lactate methyl ester

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  • A kind of heteropoly acid salt solid catalyst and its preparation method and application
  • A kind of heteropoly acid salt solid catalyst and its preparation method and application
  • A kind of heteropoly acid salt solid catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Preparation of Y / Cs x h 3-x PW 12 o 40 (the scope of x is 0.5~3.0) catalyzer, its step is as follows:

[0047] 1. Preparation of acid carrier cesium phosphotungstate: at 50°C, 0.1697g Cs 2 CO 3 Dissolve in 20mL of water, then Cs 2 CO 3 The aqueous solution was added dropwise to 1 g of phosphotungstic acid (H 3 PW 12 o 40 ) in an aqueous solution, a white precipitate was obtained, which was continued to be stirred at 50°C for 12h, dried overnight at 120°C to obtain a white solid, and calcined at 400°C for 2h to prepare Cs 3 PW 12 o 40 ;

[0048] At 50°C, 0.1414g Cs 2 CO 3 Dissolve in 20mL of water, then Cs 2 CO 3 The aqueous solution was added dropwise to 1 g of phosphotungstic acid (H 3 PW 12 o 40 ) in an aqueous solution, a white precipitate was obtained, which was continued to be stirred at 50°C for 12h, dried overnight at 120°C to obtain a white solid, and calcined at 400°C for 2h to prepare Cs 2.5 h 0.5 PW 12 o 40 ;

[0049] At 50°C, 0.1131g ...

Embodiment 2

[0057] A series of Cs prepared by step 1 of Example 1 x h 3-x PW 12 o 40 (The range of x is 0.5~3.0) The catalyst catalyzes the production of methyl lactate from cellulose:

[0058] Weigh 0.15g cellulose, 0.1g Cs x h 3-x PW 12 o 40 (The scope of x is 0.5~3.0) catalyzer, 11.76g methyl alcohol, 0.24g water are in 25mL stainless steel autoclave, pass into the air in nitrogen replacement autoclave under room temperature, repeat three times, then pass into the nitrogen of 2MPa, in Under 600rpm stirring condition, 220 ℃ of reaction 8h, centrifugation catalyst is separated after reaction finishes, and after reaction solution is filtered with 0.22 μm microporous membrane, calculate the productive rate of methyl lactate with high performance liquid chromatography, the result is shown in Table 1.

[0059] As can be seen from Table 1, the Cs prepared in Step 1 of Example 1 of the present invention 2.5 h 0.5 PW 12 o 40 The catalyst cellulose has the highest yield of methyl lact...

Embodiment 3

[0063] Utilize the Y / Cs of a series of different Y loads prepared in embodiment 1 step 2 2.5 h 0.5 PW 12 o 40 The catalyst catalyzes the production of methyl lactate from cellulose:

[0064] Weigh 0.15g cellulose, 0.1g Y / Cs 2.5 h 0.5 PW 12 o 40 Catalyst, 11.76g methyl alcohol, 0.24g water are in 25mL stainless steel autoclave, pass into the air in the autoclave of nitrogen replacement under room temperature, repeat three times, then pass into the nitrogen of 2MPa, under the stirring condition of 600 rpm, 220 ℃ for 8 hours. After the reaction, the catalyst was centrifuged. After the reaction solution was filtered with a 0.22 μm microporous membrane, the productive rate of lactic acid was measured and calculated by high performance liquid chromatography. The results are shown in Table 2.

[0065] As can be seen from Table 2, the Y / Cs of different Y loadings prepared in Step 2 of Example 1 of the present invention 2.5 h 0.5 PW 12 o 40 The average ratio of the catalyst ...

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Abstract

The invention relates to the technical field of catalysts, in particular to a heteropolyacid salt solid catalyst and its preparation method and application. The invention discloses a heteropolyacid solid catalyst, comprising: a heteropolyacid and M supported on the heteropolyacid 1 , the preparation method of the catalyst is simple, the catalyst has good catalytic performance, the yield of the prepared methyl lactate is high, the catalytic reaction conditions are mild, easy to recycle, high in reutilization rate and good in stability, the catalytic time is short, and it has a good industrial application prospect , to solve the problem that when the existing catalysts catalyze the production of methyl lactate from biomass resources, the biomass resources are relatively simple monosaccharides or oligosaccharides, and the catalytic performance is poor. No catalyst can better catalyze polysaccharides such as cellulose Technical problems related to catalysts for the production of lactate methyl esters.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a heteropolyacid salt solid catalyst and its preparation method and application. Background technique [0002] With the rapid development of economy and society, a large number of fossil resources are exploited, which leads to the gradual depletion of fossil resources and a lot of environmental pollution problems in the process of mining and use. It is an urgent need to find new renewable energy that can replace fossil resources. Biomass is currently the most promising new type of renewable resource to replace fossil resources. Substance refers to the general term for substances synthesized by plants, animals or microbial life. It is divided into plant biomass, animal biomass and microbial biomass. . Sources of plant biomass include: trees, crop waste, grasses, and municipal biomass waste. The main elements of plant biomass are C, H and O, while the main elements of fossil re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/18B01J27/188C07C67/00C07C69/68
CPCB01J27/188C07C67/00C07C69/68
Inventor 王芬芬文溢方岩雄纪红兵
Owner GUANGDONG UNIV OF TECH
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