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Catalyst for preparing methyl acrylate and acrylic acid, and preparation method and application thereof

A technology of methyl acrylate and catalyst, which is applied in the direction of carboxylate preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of low catalytic activity and poor selectivity, achieve high catalytic activity, increase service life, and slow down loss. live effect

Inactive Publication Date: 2017-05-24
SHANGHAI HUAYI GRP CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the problem of low catalytic activity and poor selectivity in the prior art. A new catalyst for producing methyl acrylate and acrylic acid is provided. The catalyst has the advantages of high catalytic activity and good selectivity

Method used

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  • Catalyst for preparing methyl acrylate and acrylic acid, and preparation method and application thereof
  • Catalyst for preparing methyl acrylate and acrylic acid, and preparation method and application thereof
  • Catalyst for preparing methyl acrylate and acrylic acid, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 2.43g LiNO 3 Dissolve in 9mL deionized water, evenly impregnate the solution in 10g 40-60 mesh γ-Al 2 o 3 Put it on, stir, let it stand for 2 hours, and evaporate excess water in a 60°C water bath. Transfer to a drying oven, dry at 100°C for 12 hours, and then bake at 550°C for 5 hours in an air atmosphere to prepare the catalyst 5 (wt%) Li / γ-Al 2 o 3 , that is, Li / γ-Al with a Li mass percentage of 5% 2 o 3 Catalyst, the same below.

[0046] In a fixed bed reactor, at 390°C, with a carrier gas flow of 50mL / min, the molar ratio of methyl acetate: formaldehyde: methanol is 1:2:2, and the space velocity is 5h -1 1. Methyl acrylate was prepared under the conditions of a feed volume of 0.06mL / min and a catalyst dosage of 0.50g. After two hours of reaction, the conversion rate of methyl acetate was 8.3%, the selectivity of methyl acrylate was 98.5%, and the yield per pass of methyl acrylate was 8.1%. For other data see surface 1 .

Embodiment 2

[0048] Weigh 1.44g NaNO 3 Dissolve in 9mL deionized water, evenly impregnate the solution in 10g 40-60 mesh γ-Al 2 o 3 Put it on, stir, let it stand for 2 hours, and evaporate excess water in a 60°C water bath. Transfer to a drying oven, dry at 100°C for 12 hours, and then bake at 550°C for 5 hours in an air atmosphere to prepare catalyst 5 (wt%) Na / γ-Al 2 o 3 .

[0049] In a fixed bed reactor, at 390°C, with a carrier gas flow of 50mL / min, the molar ratio of methyl acetate: formaldehyde: methanol is 1:2:2, and the space velocity is 5h -1 1. Methyl acrylate was prepared under the conditions of a feed volume of 0.06mL / min and a catalyst dosage of 0.50g. After two hours of reaction, the conversion rate of methyl acetate was 12.2%, the selectivity of methyl acrylate was 98.4%, and the single pass yield of methyl acrylate was 12.0%. For other data see surface 1 .

Embodiment 3

[0051] Weigh 1.13g KNO 3 Dissolve in 9mL deionized water, evenly impregnate the solution in 10g 40-60 mesh γ-Al 2 o 3 Put it on, stir, let it stand for 2 hours, and evaporate excess water in a 60°C water bath. Transfer to a drying oven, dry at 100°C for 12 hours, and then bake at 550°C for 5 hours in an air atmosphere to prepare catalyst 5 (wt%) K / γ-Al 2 o 3 .

[0052] In a fixed bed reactor, at 390°C, with a carrier gas flow of 50mL / min, the molar ratio of methyl acetate: formaldehyde: methanol is 1:2:2, and the space velocity is 5h -1 1. Methyl acrylate was prepared under the conditions of a feed volume of 0.06mL / min and a catalyst dosage of 0.50g. After two hours of reaction, the conversion rate of methyl acetate was 13.7%, the selectivity of methyl acrylate was 98.0%, and the yield per pass of methyl acrylate was 13.4%. For other data see surface 1 .

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Abstract

The invention relates to a catalyst for preparing methyl acrylate and acrylic acid, and a preparation method and an application thereof, and is used for mainly solving the problems in the prior art. The problems are relatively well solved by the technical schemes comprising that the catalyst for preparing methyl acrylate and acrylic acid is composed of a main active component, an active auxiliary agent and a carrier, wherein the main active component comprises nitrate, carbonate, aluminate, sulfate and chloride of alkali metals or alkaline earth metals, an active auxiliary agent element is selected from at least one of IIA, IIIA, VA, VIA and VIIA main group elements, IB, IIB, IIIB, IV, VB, VIB and VIII transition metal elements and lanthanides in the periodic table of elements, and the carrier is Al2O3, TiO2, ZrO2 or SiO2; for the catalyst, based on oxide, the mass percentage content of the main active component is 0.1%-50%, and the mass percentage content of the active auxiliary agent is 0.1%-20%; and the preparation method and the application of the catalyst are provided. The catalyst can be used for preparing methyl acrylate and acrylic acid by condensation reaction of methyl acetate with formaldehyde or methanol.

Description

technical field [0001] The invention relates to a catalyst for preparing methyl acrylate and acrylic acid, a preparation method and application thereof. Background technique [0002] Methyl acrylate (MA), molecule C 4 h 6 o 2 , Colorless liquid with pungent smell, slightly soluble in water, soluble in ethanol and ether. Methyl acrylate is an important intermediate in organic synthesis and a monomer in the synthesis of polymers. Polymers made from methyl acrylate have excellent weather resistance, UV resistance, water resistance, and heat resistance. It can also be applied to the copolymerization of rubber to prepare rubber with high temperature resistance and oil resistance. new type rubber. It can be copolymerized with methyl methacrylate and olefins to obtain high-performance coatings. Methyl acrylate is mainly used in construction, papermaking, leather, textiles, plastic processing, newspapers, packaging materials, daily chemicals, water treatment, oil recovery, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J23/04B01J21/10C07C69/54C07C67/343C07C57/04C07C51/353
Inventor 王振旅颜见标张文祥张春雷唐勇宁春利
Owner SHANGHAI HUAYI GRP CO
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