Purification method of easily polymerizable substances

A refining method and easy-to-polymerize technology, applied in the separation/purification of carboxylic acid compounds, separation methods, chemical instruments and methods, etc., to achieve the effects of improving production efficiency, reducing the chance of contacting chemical substances, and reducing losses
CN107001229BActive Publication Date: 2019-11-05NIPPON SHOKUBAI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NIPPON SHOKUBAI CO LTD
Publication Date
2019-11-05

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Abstract

The invention provides a method for reducing the number of times of cleaning the wire mesh, etc., improving the complexity of the operation, and efficiently refining the easily polymerizable substance. The method for purifying an easily polymerizable substance according to the present invention is characterized in that the method includes introducing a liquid containing a crude easily polymerizable substance into a distillation column, and introducing a bottom liquid recovered from a recovery part of the distillation column into a wet cyclone. In the container, and separate into the first separation process of the liquid containing the first refined polymerizable substance and the liquid containing the solid insoluble matter.
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Description

technical field

[0001] The present invention relates to a method for purifying easily polymerizable substances such as (meth)acrylic acid, particularly a method including a separation step by a wet cyclone. Background technique

[0002] In the preparation of the easily polymerizable substance, distillation is generally used to separate the easily polymerizable substance from the liquid containing the crude easily polymerizable substance and other impurities. etc. Refining method of separation by heating. However, since the easily polymerizable substance has the property of initiating polymerization by heating, after the impurities are separated from the easily polymerizable substance, the resulting polymer may exist as a solid insoluble matter in the separated liquid containing the easily polymerizable substance. As a means of removing such solid insoluble matter, for example, as shown in Patent Document 1, the solid matter removal device has a body part and a filter part, ...

Claims

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