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Method for recycling cyclohexanol from cyclohexanone device waste liquid

A technology of cyclohexanol and cyclohexanone, which is applied in the field of separation and recovery of cyclohexanol, can solve the problems of loss of useful components, environmental pollution, etc., and achieve the effect of reducing load

Active Publication Date: 2015-09-16
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if it is burned as a fuel, it will not only lose useful components, but also cause certain environmental pollution.

Method used

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  • Method for recycling cyclohexanol from cyclohexanone device waste liquid
  • Method for recycling cyclohexanol from cyclohexanone device waste liquid
  • Method for recycling cyclohexanol from cyclohexanone device waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of method technical process of reclaiming cyclohexanol from cyclohexanone plant waste liquid is as figure 1 Shown, the mass percent of each component of waste liquid is:

[0027]

[0028] Take the waste liquid and enter the extraction tower T-101. The theoretical plate number of the extraction tower T-101 is 20. The desalted water and waste liquid are fed from the top and bottom of the tower respectively, and the feed amount is 0.5m 3 / h, where the density of waste liquid is 967kg / m 3 ; The number of theoretical plates of the drying tower T-102 is 20, the feed at the top of the tower is operated under normal pressure, and the operating temperatures of the tower top and the bottom of the tower are 67 ° C and 90 ° C respectively; 50, feed material at the 20th theoretical plate, the operating pressure at the top of the tower is 50kPa, the control reflux ratio is 20, the temperature at the top of the tower and the bottom of the tower are 58°C and 142°C respective...

Embodiment 2

[0030] A kind of method technical process of reclaiming cyclohexanol from cyclohexanone plant waste liquid is as figure 1 Shown, the mass percent of each component of waste liquid is:

[0031]

[0032] Take the waste liquid and enter the extraction tower T-101. The theoretical plate number of the extraction tower T-101 is 20. The desalted water and waste liquid are fed from the top and bottom of the tower respectively, and the feed amount is 0.2m 3 / h and 0.5m 3 / h, where the density of waste liquid is 967kg / m 3 ; The number of theoretical plates of the drying tower T-102 is 20, the feed at the top of the tower is operated under normal pressure, and the operating temperatures of the top and bottom of the tower are 65 ° C and 87 ° C respectively; 50, feed material at the 20th theoretical plate, the operating pressure at the top of the tower is 50kPa, the control reflux ratio is 5, the temperature at the top of the tower and the bottom of the tower are 57°C and 140°C respec...

Embodiment 3

[0034] A kind of method technical process of reclaiming cyclohexanol from cyclohexanone plant waste liquid is as figure 1 Shown, the mass percent of each component of waste liquid is:

[0035]

[0036] Take the waste liquid and enter the extraction tower T-101. The theoretical plate number of the extraction tower T-101 is 20. The desalted water and waste liquid are fed from the top and bottom of the tower respectively, and the feeding amount is 1.0m 3 / h and 0.5m 3 / h, where the density of waste liquid is 967kg / m 3; The theoretical plate number of the drying tower T-102 is 20, the feed at the top of the tower is operated under normal pressure, and the operating temperatures of the tower top and the bottom of the tower are respectively 68 ° C and 92 ° C; the theoretical plate number of the light removal tower T-103 is 50, feed material at the 20th theoretical plate, the operating pressure at the top of the tower is 50kPa, the control reflux ratio is 10, the temperature at ...

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Abstract

The invention belongs to the technical field of organic chemistry, and relates to a method for separating and recycling cyclohexanol from a cyclohexanone device waste liquid. The method is characterized by comprising the steps of carrying out a series of treatment such as washing, drying, dehydrogenation and refining on the waste liquid, separating to obtain a cyclohexanol product with mass concentration more than 90 percent, wherein the yield of the cyclohexanol in the waste liquid reaches 90 percent or more. By adopting the technological method, the utilization rate of the cyclohexanol is effectively increased, and the discharging volume of the waste liquid can be reduced.

Description

technical field [0001] The invention belongs to the technical field of organic chemistry and relates to a method for separating and recovering cyclohexanol from waste liquid of a cyclohexanone device. Background technique [0002] Cyclohexanol is a widely used industrial raw material. It is often used as a solvent for resins, paints, ethyl cellulose, rubber, etc., and is also used as a cleaning agent, rubber reinforcement, etc. Cyclohexanol is the main raw material for the preparation of adipic acid and cyclohexanone, and its production methods mainly include phenol hydrogenation, cyclohexane oxidation and cyclohexene hydration. Cyclohexanol is dehydrogenated under the action of a catalyst to generate product cyclohexanone, which is the main raw material for producing caprolactam. [0003] The process of preparing cyclohexanone by cyclohexene method mainly includes the following steps: first, benzene is partially hydrogenated under the action of a catalyst to produce cycloh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/74C07C29/80C07C29/86C07C35/08
CPCC07C29/76C07C29/80C07C29/86C07C35/08
Inventor 李广忠刘新伟李岩刘增坤王敬伟刘莹王雨农
Owner CHINA TIANCHEN ENG
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