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A kind of isopropanol waste liquid separation method and separation device containing acetone

A waste liquid separation and isopropanol technology, which is applied in chemical instruments and methods, preparation of organic compounds, water/sludge/sewage treatment, etc., can solve the problems of low recovery efficiency, acetone residue, unreachable, etc., and achieve Improve separation efficiency, high recovery rate, energy saving effect

Active Publication Date: 2016-08-17
SUZHOU JIMCEL ELECTRONICS NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of use, waste liquid will be generated, and many manufacturers will use different substances in different processes to discharge the waste liquid together, and the mixed waste liquid is more difficult to separate and utilize
[0003] At present, the isopropanol waste liquid containing acetone is generally treated as industrial waste or discarded by burning or burying it. There are also ordinary distillation methods to treat the waste liquid. Although most of the acetone can be removed, there will still be a small amount of residue , cannot meet the requirements of high-purity reagents in the electronics industry, so the recovery benefit is not high
[0004] Separation of isopropanol and acetone by ordinary distillation, if want to obtain the higher isopropanol of purity, then need to remove more front cut, cause the recovery rate of isopropanol very low, if the front cut of removal is insufficient, there will be a small amount Acetone remains, reducing the purity of isopropanol, which cannot meet the requirements of high-purity reagents in the electronics industry
[0005] The above two problems are caused by the fact that although the boiling points of isopropanol and acetone differ by 26°C, they cannot be separated well by ordinary distillation methods and separation devices, so the separation effect is poor.

Method used

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  • A kind of isopropanol waste liquid separation method and separation device containing acetone
  • A kind of isopropanol waste liquid separation method and separation device containing acetone

Examples

Experimental program
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Effect test

Embodiment 1

[0032] refer to figure 1 Shown, a kind of isopropanol waste liquid separation method containing acetone may further comprise the steps:

[0033] Step 1) Configure the azeotrope, prepare cyclohexane according to the weight ratio formula, mix the cyclohexane with the isopropanol waste liquid containing acetone, and obtain the azeotrope, wherein the ratio formula is: cyclohexane=waste Liquid weight* (weight of acetone in waste liquid*0.48+water content in waste liquid*0.3);

[0034] Step 2) One-stage rectification, the azeotrope is heated to 53 ° C, and then rectified and separated. The azeotropic liquid of acetone and cyclohexane boils at this temperature, and is collected after being evaporated. When the evaporated liquid reaches the standard, Promptly take part of the distilled liquid for detection, when the weight of acetone contained in the detected distilled liquid is less than 0.1%, it is up to the standard, and a section of rectification is completed to obtain the collec...

Embodiment 2

[0047] The difference between Example 2 and Example 1 is that during one-stage rectification, the azeotrope is heated to 54°C, and in the second-stage rectification, the waste liquid is heated to 65°C. After the dehydration is completed, the heating temperature is 68°C. and equipment are consistent with embodiment one.

[0048] In the second embodiment, the temperature is adjusted to ensure that the temperature deviation caused by the environment and equipment during use is beneficial to ensure the continuation of the boiling point, ensure the normal operation of the rectification, and make the operation more stable.

[0049] The present invention separates the acetone very well through the setting of separation equipment and the intervention of cyclohexane without affecting the quality of the rectification, the separation effect is good, and the cyclohexane can be recycled, which saves energy and greatly The pollution of the waste liquid to the environment is reduced.

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Abstract

The invention discloses a method for separating acetone from isopropanol waste liquid, which comprises the following steps: step 1) configuring an azeotrope; step 2) one-stage rectification; step 3) two-stage rectification; step 4) three-stage rectification distillation, to obtain isopropanol; step 5) separate and collect liquid one, obtain the mixture of hexanaphthene and acetone and water, complete separation, and its separation device comprises by high position tank, raw material tank, one-stage rectification tank, two-stage rectification The tank and the three-stage rectifying tank are sequentially connected to form. The invention has higher separation efficiency, effectively saves energy and reduces environmental pollution.

Description

technical field [0001] The invention relates to the field of waste liquid treatment, in particular to a method for separating acetone-containing isopropanol waste liquid and a separation device thereof. Background technique [0002] Both isopropanol and acetone are chemical solvents, which are very important chemical products and raw materials, and are widely used in pharmaceutical, cosmetic, paint and other industries. In the process of use, waste liquid will be generated, and many manufacturers will discharge the waste liquid generated by using different substances in different processes together, and the mixed waste liquid is more difficult to separate and utilize. [0003] At present, the isopropanol waste liquid containing acetone is generally treated as industrial waste or discarded by burning or burying it. There are also ordinary distillation methods to treat the waste liquid. Although most of the acetone can be removed, there will still be a small amount of residue ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/40C02F1/04C07C29/80C07C31/10C02F103/36
Inventor 刘鸣刘利娟孙宇亮
Owner SUZHOU JIMCEL ELECTRONICS NEW MATERIAL