Treatment system of crude methylthio propionaldehyde synthesized by methyl mercaptan and acraldehyde

Abstract

The invention discloses a treatment system of crude methylthio propionaldehyde synthesized by methyl mercaptan and acraldehyde. The system comprises a low-vacuum rectifying tower, a high-vacuum rectifying tower, an emulsifying tank and an incinerator, wherein the low-vacuum rectifying tower is used for receiving crude methylthio propionaldehyde, discharging a heavy component from the tower bottom and discharging a light component from the tower top; the high-vacuum rectifying tower is used for receiving the heavy component discharged from the tower bottom of the low-vacuum rectifying tower, discharging the product methylthio propionaldehyde from the tower top and discharging the heavy component from the tower bottom; the emulsifying tank is used for receiving the light component discharged from the tower top of the low-vacuum rectifying tower and the heavy component discharged from the tower bottom of the high-vacuum rectifying tower; the incinerator is used for receiving an emulsion from the emulsifying tank through a pipeline and incinerating the emulsion. The crude methylthio propionaldehyde synthesized by methyl mercaptan and acraldehyde is processed by using the treatment system disclosed by the invention. The problem that the light and heavy components are respectively conveyed to result in blocking of the pipeline is solved in a manner of emulsifying the light and heavy components into the emulsion, an environmental protection event is completely eradicated, and the manufacturing shop and the local resident environment are improved.

Description

[0001] This application is a branch of an invention patent application with the application number "201210131610.6", the application date is April 28, 2012, and the invention title is "processing method and system for crude methylthiopropionaldehyde synthesized from methyl mercaptan and acrolein". case application. technical field [0002] The invention relates to the treatment of crude methylthiopropionaldehyde synthesized by the reaction of methyl mercaptan and acrolein, in particular to a treatment system for by-products in the crude methylthiopropionaldehyde. Background technique [0003] Methylthiopropionaldehyde is an important intermediate for the preparation of methionine, which is mainly prepared through the Michael addition reaction of methylmercaptan and acrolein under the catalysis of an organic base. Using this method, methionaldehyde can be prepared under relatively mild conditions, such as under normal pressure at a temperature of 30-40° C., and the yields are...

AI Technical Summary

Problems solved by technology

However, because the heavy component is very viscous, like asphalt, there is no suitable pump with good sealing performance to transport this viscous substance during the process of transporting to incineration, and it is also very easy to block the pipeline; and once the pipeline is blocked , not only will affect the continuous and stable production of the workshop; but also in the process of overhauling the clogged pipeline, the heavy component will leak into the environment, resulting in serious environmental pollution

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