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Method for preparing methallyl alcohol through acrylaldehyde selective hydrogenization

A technology for producing methallyl alcohol and methacrolein, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problem of small production capacity, low raw material conversion rate and product selectivity, and catalysts It is difficult to separate from the product and other problems, and achieve the effects of high selectivity, energy saving and separation cost, and high atom utilization

Inactive Publication Date: 2017-05-10
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the production capacity in the prior art is small, the conversion rate of raw materials and product selectivity are low, and the catalyst and the product are difficult to separate. Allyl Alcohol Method

Method used

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  • Method for preparing methallyl alcohol through acrylaldehyde selective hydrogenization
  • Method for preparing methallyl alcohol through acrylaldehyde selective hydrogenization
  • Method for preparing methallyl alcohol through acrylaldehyde selective hydrogenization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 20g TiO 2 Carrier, dissolved in a certain amount of copper sulfate solution containing polyethylene glycol, impregnated at room temperature for 12 hours, then stirred and dried at 80°C to obtain Cu / TiO 2 Precursor; the Cu / TiO 2 The precursor is dissolved in a certain amount of mixed solution of chloroauric acid and stannous chloride, soaked at room temperature for 12 hours, and then dried with stirring at 80°C. The obtained sample was dried at 80°C for 24h and calcined at 600°C for 4h to obtain a supported catalyst 33%Cu-0.1%Au-0.1%Sn / TiO 2 . The content of each component in the prepared supported catalyst is the content of mass percentage, the same below.

Embodiment 2

[0021] Weigh 20g ZrO 2 Carrier, dissolved in a certain amount of silver nitrate solution containing sodium lauryl sulfate, impregnated at room temperature for 12 hours, then stirred and dried at 80°C to obtain the precursor Ag / ZrO 2 Precursor; the Ag / ZrO 2 The precursor is dissolved in a certain amount of chloroiridic acid and lanthanum nitrate solution, soaked at room temperature for 12 hours, and then dried with stirring at 80°C. The obtained sample was dried at 150°C for 8h and calcined at 250°C for 12h to obtain a supported catalyst 0.5%Ag-5%Ir-%5La / ZrO 2 .

Embodiment 3

[0023] Weigh 20g ZnO carrier, dissolve it in a certain amount of silver nitrate solution containing polyvinylpyrrolidone, immerse it at room temperature for 12h, then stir and dry at 80°C to obtain the precursor Ag / ZnO precursor; dissolve the Ag / ZnO precursor in a certain The mixed solution of ruthenium chloride and manganese nitrate was impregnated at room temperature for 12 hours, and then dried with stirring at 80°C. The obtained sample was dried at 115° C. for 16 hours and calcined at 425° C. for 6 hours to obtain a supported catalyst 19% Ag-1% Ru-2% Mn / ZnO.

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Abstract

The invention relates to a method for preparing methallyl alcohol through acrylaldehyde selective hydrogenization. The method mainly solves the problems of low production capability, low raw material conversion rate, low product selectivity and separation difficulty of catalysts and products in the prior art. The method adopts the technical scheme that the method of preparing methallyl alcohol through acrylaldehyde selective hydrogenization is used, acrylaldehyde and hydrogen gas are continuously introduced into a fixed bed reactor; under the catalyst reaction condition, the continuous catalysis selective hydrogenization reaction is performed; the generated product is subjected to gas-liquid separation and fractionating; then, a methallyl alcohol product and unreacted acrylaldehyde are obtained; the hydrogen gas obtained after the gas-liquid separation and the unreated acrylaldehyde obtained after the fractionating are cyclically used. The problems are well solved. The method can be used for preparing methallyl alcohol through acrylaldehyde selective hydrogenization.

Description

technical field [0001] The invention relates to a method for preparing methallyl alcohol through selective hydrogenation of methacrolein. Background technique [0002] Methallyl alcohol is an important organic intermediate used in the synthesis of perfumes, resins, etc. The synthesis of methallyl alcohol polyoxyethylene ether (HPEG) from methallyl alcohol and ethylene oxide can be used as a new generation of high-performance concrete water reducer, and the market demand is strong. [0003] Polycarboxylate water reducers are divided into two categories: polyester type (MPEG) and polyether type (APEG / TPEG). Although polyether type water reducers appeared relatively late, they began to be produced and applied in 2008. By the end of 2010, the market The polyether type water reducer has exceeded 50%, and the development is very rapid, mainly because the polyether type water reducer is simple to process, stable in performance, relatively low in technical requirements, and conveni...

Claims

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Application Information

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IPC IPC(8): C07C29/141C07C33/03B01J23/89B01J23/66B01J23/68
CPCY02P20/584C07C29/141B01J23/66B01J23/688B01J23/8926B01J23/894B01J23/896B01J23/8966B01J23/8986C07C33/03
Inventor 芮果李永刚宁春利廖湘洲孙思杰张春雷
Owner SHANGHAI HUAYI GRP CO
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