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A catalyst, its preparation method and the method of using the catalyst to produce methyl acrylate and co-produce methyl methacrylate

A catalyst and catalyst carrier technology, applied in chemical instruments and methods, preparation of organic compounds, catalysts for physical/chemical processes, etc., can solve problems such as high price, increased product separation, purification cost, and difficulty in applying by-products.

Active Publication Date: 2015-12-30
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of synthesizing methyl acrylate with methyl acetate and formaldehyde, a small amount of hydrogenation by-product, namely methyl propionate, will be obtained, but due to the specificity of the catalyst, this part of by-product is difficult to be applied in the prior art
Moreover, the cost of separation and purification of the product, as well as the discharge and treatment cost of by-products are increased.
In addition, due to the wide variety of modern catalysts, which are expensive and have different mechanisms, the reaction products are complex and diverse. Therefore, more, more targeted and customized catalyst compositions need to be developed
[0007] And, take methyl acetate and formaldehyde as the research of synthesizing methyl acrylate and methyl methacrylate simultaneously as raw material has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) 4.142gSb 2 o 3 Mix with 25ml of deionized water in a 50ml three-neck flask, stir and heat to 75°C, condense and reflux, add 2ml of stabilizer triethanolamine, heat up to 85°C after 10min, add dropwise H 2 o 2 3 ~ 4ml, continue to stir until the solution is clear to obtain a colloidal solution;

[0038] (2) Weigh 20.0g of SiO with a particle size of 50-100 micron microspheres 2 Carrier, under the condition of 70 ℃, the colloidal solution obtained in (1) and SiO 2 Carriers were mixed, impregnated with continuous stirring for 8 hours, dried at 90°C for 2 hours, and calcined at 450°C for 3 hours to obtain Sb / SiO 2 ;

[0039] (3) Weigh 0.1235gZr(NO3) 4 ·5H 2O and 4.628gCsNO 3 , dissolved in 30ml deionized water;

[0040] (4) At 70°C, mix the mixed solution obtained in (3) with the Sb / SiO obtained in (2) 2 Mixing, continuous stirring and impregnation for 10h, drying at 90°C for 2h, calcination at 450°C for 3h, to obtain SiO 2 supported Cs-Zr-Sb composite cataly...

Embodiment 2

[0044] Except in step (3), with 3.868gCs 2 CO 3 instead of CsNO 3 Otherwise, the catalyst composition was prepared by the preparation method described in Example 1.

[0045] Adopt the condition described in the embodiment one to carry out synthetic methyl acrylate and methyl methacrylate reaction evaluation to this catalyst, evaluation result is: the conversion rate of methyl acetate is 23.41%, and the selectivity of methyl acrylate is 75.67%, The selectivity of methyl methacrylate was 7.51%.

Embodiment 3

[0047] Except in step (1), the Sb 2 o 3 The amount is increased to 6.728g, and the catalyst composition is prepared by the preparation method described in Example 1.

[0048] Adopt the condition described in the embodiment one to carry out synthetic methyl acrylate and methyl methacrylate reaction evaluation to this catalyst, evaluation result is: the conversion rate of methyl acetate is 32.75%, and the selectivity of methyl acrylate is 74.27%, The selectivity of methyl methacrylate is 15.62%.

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PUM

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Abstract

The invention relates to a catalyst composition for synthesis of methyl acrylate and co-production of methyl methacrylate by methyl acetate and formaldehyde, a preparation method of the catalyst composition and a method for production of methyl acrylate and co-production of methyl methacrylate by using the catalyst composition. The catalyst composition disclosed by the invention takes SiO2 as a catalyst carrier, and also comprises metal salts of Cs and Zr, and an oxide of Sb.

Description

technical field [0001] The invention relates to a catalyst composition, a preparation method thereof and a method for producing chemical raw materials using the catalyst composition, in particular to a catalyst for synthesizing methyl acrylate and co-producing methyl methacrylate from methyl acetate and formaldehyde Compositions, methods for their preparation, and methods of using the catalyst compositions to produce methyl acrylate and co-produce methyl methacrylate. Background technique [0002] Methyl acrylate is mainly used as an intermediate in organic synthesis, and also as a monomer for the synthesis of high molecular polymers, used in rubber, medicine, leather, papermaking, adhesives, etc. The synthesis methods of acrylic acid (ester) mainly include: acrylonitrile hydrolysis method, propylene oxidation method and ketene method, among which the propylene oxidation method is more widely used. In industrial production, the method of oxidizing propylene to acrylic acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/18C07C69/54C07C67/343
Inventor 张英伟张凌伟王耀红王朋孙长江
Owner BEIJING RISUN TECH CO LTD
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