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A kind of method for preparing methyl 3-methoxypropionate

A technology of methyl methoxypropionate and methyl acetate, which is applied in the field of preparing methyl 3-methoxypropionate, can solve the problems of discontinuity, catalysts cannot be reused, and takes a long time to achieve good stability, Large-scale industrial application value and remarkable technical effect

Active Publication Date: 2021-01-19
北京博迩科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention will solve is the problems such as existing 3-methoxymethyl propionate production technology process is time-consuming, discontinuous, catalyst can not be reused, and a kind of new preparation method of 3-methoxymethyl propionate is provided, The method has the characteristics of low raw material price, continuous production process, reusable catalyst and high yield of methyl 3-methoxypropionate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst preparation:

[0022] 128.2g Mg(NO 3 ) 2 ·6H 2 O and 64g Na 2 CO 3 Dissolve in pure water respectively to make a solution with a concentration of 2mol / L. After co-precipitation, aging and washing, dry at 90°C for 6h, then roast at 550°C for 5h, and press into tablets to obtain the MgO carrier.

[0023] Weigh 3.67g CsNO 3 and 0.12g Zr(NO 3 ) 4 ·5H 2 O was dissolved in pure water to make a solution with a concentration of 0.5mol / L, and 25g of the above-prepared MgO carrier was impregnated at 60°C for 5h, dried at 90°C for 6h, and then calcined at 450°C for 5h to obtain the composition .

[0024] Dissolve 0.87g NaOH in pure water to make a 0.5 mol / L solution and impregnate the above composition at 50°C for 3h, dry at 90°C for 6h, and then calcinate at 450°C for 5h to obtain the catalyst.

[0025] Preparation of methyl 3-methoxypropionate:

[0026] Put 2.5ml of the catalyst prepared above into a fixed-bed reactor, at a reaction temperature of 320°C, unde...

Embodiment 2

[0028] CsNO 3 The addition amount of the compound is changed to 5.49g, and all the other conditions are unchanged, and the catalyst preparation method described in Example 1 is used to prepare the catalyst.

[0029] The catalyst was evaluated using the reaction conditions described in Example 1. The results are: the conversion rate of methyl acetate is 49.31%, and the selectivity of methyl 3-methoxypropionate is 94.83%.

Embodiment 3

[0031] With 3.06g Cs 2 CO 3 instead of CsNO 3 , the rest of the conditions remain unchanged, and the catalyst is prepared by the catalyst preparation method described in Example 1.

[0032] The catalyst was evaluated using the reaction conditions described in Example 1. The results are: the conversion rate of methyl acetate is 46.59%, and the selectivity of methyl 3-methoxypropionate is 95.26%.

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PUM

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Abstract

The invention relates to a method for preparing 3-methyl methoxypropionate. The method is characterized in that methyl acetate, formaldehyde and methanol are used as raw materials for reaction under the presence of a catalyst, and 3-methyl methoxypropionate is obtained. The catalyst is composed of an active component and a carrier. The active component includes a Cs metal salt, an alkali metal hydroxide and an IVB-group metal oxide. The method has the advantages in that the raw materials are low in cost, the production process is continuous and 3-methyl methoxypropionate is high in yield.

Description

technical field [0001] The invention relates to a method for preparing methyl 3-methoxypropionate, which belongs to the field of chemical industry. Background technique [0002] Methyl 3-methoxypropionate is an important organic solvent and organic synthesis intermediate, widely used in electronics industry, cleaning industry, adhesive and coating industry, and organic synthesis and other fields. [0003] Methyl 3-methoxypropionate is mainly prepared by catalytic addition reaction of methyl acrylate and methanol, and the commonly used catalyst is sodium methoxide. Patent CN200410011392.8 discloses a method for preparing methyl 3-methoxypropionate using methyl acrylate and methanol: using sodium methoxide or potassium methoxide as a catalyst, the molar ratio of raw material methanol to methyl acrylate is 2.0-3.0:1 , The dropwise addition time of methyl acrylate is at least 10 hours, and the reaction time is 2-6 hours. After the reaction, the catalyst needs to be neutralized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/343C07C69/708B01J23/04
CPCB01J23/002B01J23/04B01J2523/00C07C67/343B01J2523/12B01J2523/15B01J2523/22B01J2523/48B01J2523/13C07C69/708
Inventor 张凌伟刘艳丽
Owner 北京博迩科技有限公司