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Solid catalyst for preparing methylmethacrylate

A technology of methyl methacrylate and solid catalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, aldehyde redox preparation, etc. The effect is not very clear, etc., to achieve the effect of simple operation, simple element composition, and short reaction time

Inactive Publication Date: 2008-12-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents all have the problem that the elements contained in the components are many and miscellaneous, which leads to unclear effects of each element of the catalyst, and the pH of the reaction solution needs to be adjusted before the reaction, which is troublesome to operate.

Method used

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  • Solid catalyst for preparing methylmethacrylate
  • Solid catalyst for preparing methylmethacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.500g PdCl according to the composition ratio of the solid catalyst 2 , and dissolve it in 15ml deionized water dissolved with 0.330g NaCl in advance, and weigh 5.00g MgO in proportion to add to the above solution. After stirring at room temperature for 45 minutes, let it stand for 30 minutes, and reduce it with 25 mL of HCHO-NaOH solution under stirring for 45 minutes in a water bath at 70 ° C, then filter it with suction, wash the solid with deionized water, and dry it to obtain a 6Pd / MgO catalyst.

[0020] Weigh 0.283g Pb(Ac) according to the composition ratio of the solid catalyst 2 ·3H 2 O, and it was dissolved in 15ml of deionized water, and 5.00g of 6Pd / MgO was weighed proportionally and added to the above solution. After stirring at room temperature for 45 minutes, let stand for 30 minutes, and reduce with 25mL HCHO solution under stirring for 45 minutes in a 70°C water bath, then filter with suction, wash the solid with sufficient deionized water, and...

Embodiment 2

[0025] Weigh 0.333g PdCl according to the composition ratio of solid catalyst 2 , and dissolve it in 15ml deionized water dissolved with 0.220g NaCl in advance, and weigh 5.00g MgO in proportion to add to the above solution. After stirring at room temperature for 45 minutes, let it stand for 30 minutes, and reduce it with 25mL HCHO-NaOH solution under stirring for 45 minutes in a water bath at 70°C, then filter it with suction, wash the solid with deionized water, and dry it to obtain a composition of 4Pd / MgO catalyst.

[0026] Weigh 0.092g Pb(Ac) according to the composition ratio of the solid catalyst 2 ·3H 2 O, and it was dissolved in 15ml of deionized water, and 5.00g of 4Pd / MgO was weighed proportionally and added to the above solution. After stirring at room temperature for 45 minutes, let stand for 30 minutes, and reduce with 25mL HCHO solution under stirring for 45 minutes in a water bath at 70°C, then filter with suction, wash the solid with sufficient deionized wa...

Embodiment 3

[0031] Weigh 0.583g PdCl according to the composition ratio of solid catalyst 2 , and dissolve it in 15ml deionized water dissolved with 0.385g NaCl in advance, and weigh 5.00g MgO in proportion to add to the above solution. After stirring at room temperature for 45 minutes, let it stand for 30 minutes, and reduce it with 25mL HCHO-NaOH solution under stirring for 45 minutes in a water bath at 70°C, then filter it with suction, wash the solid with deionized water, and dry it to obtain 7Pd / MgO catalyst.

[0032] Weigh 0.333g Pb(Ac) according to the composition ratio of the solid catalyst 2 ·3H 2 O, and it was dissolved in 15ml of deionized water, and 5.00g of 7Pd / MgO was weighed proportionally and added to the above solution. After stirring at room temperature for 45 minutes, let it stand for 30 minutes, and reduce it with 25 mL of HCHO solution under stirring for 45 minutes in a water bath at 70°C, then filter it with suction, wash the solid with sufficient deionized water,...

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PUM

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Abstract

The invention provides a solid catalyst used for preparing methyl methacrylate, and relates to a solid catalyst, in particular to a solid catalyst which takes oxides of palladium, plumbum and metal as the main components and is mainly used for preparing methyl methacrylate by further oxidizing and esterifying methylacrolein. The invention provides a solid catalyst used for preparing methyl methacrylate. The components and compounding ratio are Alpha-Pd-Beta-Pb-Gamma-M / carrier, wherein, Pd is palladium, Pb is plumbum, and M is Fe or Bi; Alpha, Beta and Gamma respectively represents the mass percentage of each component in the catalyst, Alpha equals 4% - 7%, Beta equals 1% - 3.5%, Gamma equals 0% - 3%, and the rest is the carrier, which is at least one of MgO, ZnO orCo2O3.

Description

technical field [0001] The present invention relates to a kind of solid catalyst, especially relate to a kind of main component and be palladium, lead, metal oxide, be mainly used in preparing methylmethacrylate (MethylMethacrylate) through one-step oxidation esterification from methacrolein (methacrolein, MAL). , MMA) solid catalyst. Background technique [0002] Methyl methacrylate (MMA) is a monomer for the production of polymethyl methacrylate (plexiglass) and acrylic resin materials, and is also widely used in the production of coatings, emulsion resins, adhesives and medical functional polymer materials. [0003] At present, the domestic production is mainly based on the acetonitrile alcohol method (ACH method), the synthetic route is complicated, the process flow is long, the yield after the multi-step reaction is low, and the cost is high. And this method adopts highly toxic hydrocyanic acid as a raw material, produces a large amount of ammonium bisulfate by-product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J23/89C07C69/54C07C67/44
Inventor 王野王惠纯张庆红
Owner XIAMEN UNIV
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