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Dehydrating agent recovery method

A recovery method and dehydrating agent technology, applied in chemical instruments and methods, separation/purification of carboxylic acid esters, preparation of organic compounds, etc., to achieve the effect of simple recovery process

Pending Publication Date: 2022-03-15
扬州三和化工有限公司
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Problems solved by technology

[0002] The waste water produced by the esterification reaction is divided into low COD waste water and water-insoluble organic phase after being treated by a stripping tower. The low COD waste water is directly treated by the sewage workshop, while the organic phase needs to be treated separately. In the prior art, this has not yet been Method for Recycling the Organic Phase

Method used

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  • Dehydrating agent recovery method

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Embodiment Construction

[0016] The invention is further explained below in conjunction with the accompanying drawings:

[0017] A dehydrating agent recovery method, including the following steps:

[0018] a, the wastewater of the esterification reaction is divided into low COD wastewater and the water-insoluble organic phase, and the material is obtained from the feed tube 1 into the rectification tam armor 2 from the feed tube 1 as a raw material. The bottom of the tower 2 has an reboiler 4, the rectification tamr 2 column is heated with low pressure steam, and the top of the rectifier tam armor 2 has a condenser armor 6, the rectification tam armor 2 reflow ratio Control is 15 ~ 20, the temperature of the top of the tower is 45 ° C ~ 50 ° C, the temperature of the tower is 55 ° C ~ 60 ° C, the top of the rectal tam armor 2 has a light group armor, and the nails of the light group are proportional. 36.4%;

[0019] B, the tower of the rectification tam armor 2 enters the rectification tamper B 3 in the b...

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Abstract

The invention discloses a dehydrating agent recovery method, and belongs to the technical field of chemical production. Comprising the following steps: the wastewater of esterification reaction is divided into low-COD wastewater and a water-insoluble organic phase after being treated by a stripping tower, the organic phase is taken as a raw material, the raw material enters a rectifying tower A from a feeding pipe, a light component A is extracted from the tower top of the rectifying tower A, tower bottoms in the rectifying tower A enter a rectifying tower B from the tower bottom, and a light component B is extracted from the tower bottom of the rectifying tower B; a light component B is extracted from the top of the rectifying tower B, tower bottom liquid in the rectifying tower B is cooled and then enters a phase separation tank from the tower bottom to be separated into two layers, namely water and an organic phase, and the organic phase on the upper layer mainly comprises 9% of methyl acetate and 80% of benzene, so that the dehydrating agent is obtained. According to the dehydrating agent recovery method provided by the invention, the dehydrating agent component in the esterification reaction wastewater organic phase is recycled, and the recovery process is simple and environment-friendly.

Description

Technical field [0001] The present invention relates to the field of chemical production techniques, and more particularly to a dehydrating agent recovery method. Background technique [0002] The wastewater produced by the esterification reaction was divided into low COD wastewater and insoluble in water, and the low COD wastewater was directly treated by the sewage shop, and the organic phase required additionally, in the prior art, this has not yet The organic phase is used for recycling. Inventive content [0003] The present invention discloses a dehydrating agent recovery method, which can recover the dehydration agent in the organic phase of the esterification reaction wastewater. [0004] The present invention is achieved by the following technical solutions: [0005] A dehydrating agent recovery method, including the following steps: [0006] a, the wastewater of the esterification reaction is divided into low COD wastewater and the water-insoluble organic phase after t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C7/10C07C15/04C07C67/48C07C67/54C07C69/14
CPCC07C7/005C07C7/04C07C7/10C07C67/48C07C67/54C07C15/04C07C69/14
Inventor 周晓成
Owner 扬州三和化工有限公司
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