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Process for extracting methanol using water in manufacturing of methyl methacrylate products

A technology of methyl methacrylate and methanol, which is applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of hydroxyl compounds, etc., and can solve the problem of high methanol content

Inactive Publication Date: 2005-01-19
PEN MAKING FACTORY SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This raises the problem of too high a methanol content in the crude methyl methacrylate

Method used

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  • Process for extracting methanol using water in manufacturing of methyl methacrylate products
  • Process for extracting methanol using water in manufacturing of methyl methacrylate products
  • Process for extracting methanol using water in manufacturing of methyl methacrylate products

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Embodiment Construction

[0010] Extraction of methanol with water is generally carried out in a water analysis pot. From figure 1 It can be seen in the figure that the water analysis pot can be formed by connecting one or more pots in series. The more the pots are connected in series, the better the water extraction effect will be. When extracting, MMA (containing a small amount of methanol) and water enter the static mixer in proportion to make them fully contact with the extraction, and then enter the water analysis pot. Because MMA is slightly soluble in water, the proportion difference between the two is relatively large, and relatively static stratification is carried out in the water analysis pot. The upper layer is the extracted MMA monomer, which enters the next water analysis pot through the overflow port, and the lower layer is water ( The solution containing methanol) is pumped into the last water analysis pot by the metering pump. After several water analysis pots and several times of wa...

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Abstract

The invention discloses a process for extracting methanol using water in manufacturing of methyl methacrylate products, wherein the MMA containing a small amount of menthol and water are fed into a static mixer by the proportion of 1:1-5, then into a water extraction pot, the upper layer is the extracted MMA monomer, which enters the next water extraction pot through an overflow port, the lower layer is aqueous solution of menthol, which is pumped onto an upper water extraction pot by a measuring pump, through the extraction by several water extraction pots, the methanol in the MMA can be removed substantially.

Description

Technical field: [0001] The invention relates to a method for extracting methanol with water during the manufacture of methyl methacrylate. Background technique: [0002] At present, in the production process of methyl methacrylate (MMA) prepared by acetone cyanohydrin method, esterification reaction is carried out by hydrolyzed methacrylic acid and methanol. [0003] [0004] In order to complete the esterification reaction, the general method is to increase the concentration of methanol and remove the products MMA and water. This raises the problem that the methanol content in the crude methyl methacrylate is too high. Invention content: [0005] The invention aims at the shortcomings of the prior art, and provides a method for extracting methanol with water in the process of producing methyl methacrylate, thereby reducing the content of methanol. [0006] The invention relates to a method for extracting methanol with water in the process of producing methyl methacr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/86C07C31/04C07C67/58C07C69/54
Inventor 吴荣桃陈建生
Owner PEN MAKING FACTORY SHANGHAI
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