Method for recovering acrylic acid in wastewater

A technology for acrylic acid and waste water, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate, etc., can solve problems such as difficult treatment, low content of acrylic acid, waste of acrylic acid, etc., to improve economic benefits, The effect of increasing the recovery rate and improving the utilization rate

Inactive Publication Date: 2019-12-10
中石油吉林化工工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented method involves efficient recovering acryic acid from various sources such as industrial effluents or domestic sewage water without generating too much harmful chemicals that could be used for other purposes like fertilizers. By separating these components beforehand with specific techniques, more precise control over how they are separated can enhance their success rates while reducing costs associated therewith. Additionally, reuse of acids generated during manufacturing processes reduces environmental concerns due to emissions into rivers and lakes through pollution-related issues.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving methods for producing high purity acroleins from crude oil or natural sources like naphtha while reducing environmental concerns associated with disposing these products properly.

Method used

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  • Method for recovering acrylic acid in wastewater

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Embodiment approach

[0032] According to one embodiment of the present invention, a kind of method for recovering acrylic acid in waste water of the present invention comprises:

[0033] S1. The first stream A of the liquid phase is sent to the light fractionation tower 1 for distillation to obtain the second stream B in the gas phase and the third stream C in the liquid phase;

[0034] S2. The third stream C is sent to the deacetic acid tower 2 for distillation to obtain the fourth stream D in the gas phase and the fifth stream E in the liquid phase;

[0035] S3. Send the fifth stream E to the acrylic acid purification tower 3 for distillation to obtain the sixth stream F in the gas phase and the seventh stream G in the liquid phase, wherein the sixth stream F is condensed at the top of the acrylic acid purification tower 3 and divided into Two parts, one part of which is refluxed to the acrylic acid purification tower 3, and the other part is sent to the finished product tank 4.

[0036] S4. The s

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Abstract

The invention relates to a method for recovering acrylic acid in wastewater. The method comprises the following steps: S1, sending a liquid-phase first material flow to a light-component fractionatingtower for distilling to obtain a gas-phase second material flow and a liquid-phase third material flow; S2, sending the third material flow to an acetic acid removing tower for distillation to obtaina gas-phase fourth material flow and a liquid-phase fifth material flow; S3, the fifth material flow is sent to an acrylic acid purification tower for distillation to obtain a gas-phase sixth material flow and a liquid-phase seventh material flow, condensing the sixth material flow at the top of the acrylic acid purification tower and obtaining two product parts through separation, sending one product part back to the acrylic acid purification tower, and the other product part to a finished product tank; and S4, sending the seventh material flow to an acrylic acid stripping tower for distillation to obtain a gas-phase eighth material flow and a liquid-phase ninth material flow, sending the eighth material flow to the light-component fractionating tower, and sending the ninth material flowto the outside. According to the method, acrylic acid in the wastewater is recycled, and the utilization rate of raw materials is increased.

Description

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Claims

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Application Information

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Owner 中石油吉林化工工程有限公司
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