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Treatment process of 2-ethyl hexanol liquid waste

A waste liquid treatment and process technology, which is applied in the field of butyl-octyl alcohol waste liquid treatment process, can solve the problems of wasting organic matter, poor product quality, and inconspicuous economic benefits, and achieve environmental pollution reduction, good economic and social benefits, and saving resource effect

Inactive Publication Date: 2013-10-09
SHANGHAI DONGHUA ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of method 1 is that a large amount of valuable organic matter in the waste liquid is wasted. The problem of method 2 is that aldols are not separated during the separation process, and the recovered product is of poor quality and contains a large amount of water. It is not suitable for direct sales or return to butanol and octanol The main device produced, the economic benefit is not obvious

Method used

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  • Treatment process of 2-ethyl hexanol liquid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material of butanol waste liquid is heated to 60°C and enters the first rectification tower from the middle, and the heat of material evaporation is provided by the reboiler of the tower kettle. The entrainer toluene is added from the first tray, the flow rate is 2Kg / h, and the material temperature is 40°C. After the material extracted from the top of the first rectification tower passes through the decanter for stratification, the upper liquid circulates back to the first rectification tower. The temperature at the top of the tower is controlled at 70°C, controlled by the circulating liquid flow. The temperature of the tower bottom is controlled at 120°C, which is controlled by the amount of steam heated by the tower bottom. The pressure at the top of the tower is -0.05MPa.

[0024] The bottom liquid of the first rectification tower is sent to the feed port in the middle of the second rectification tower through the liquid extraction pump 1. The temperature a...

Embodiment 2

[0029] The raw material of butanol waste liquid is heated to 90°C and enters the first rectification tower from the middle, and the heat of evaporation of the material is provided by the reboiler of the tower kettle. The entrainer benzene is added from the first tray, the flow rate is 2Kg / h, and the material temperature is 40°C. After the material extracted from the top of the first rectification tower passes through the decanter for stratification, the upper liquid circulates back to the first rectification tower. The temperature at the top of the tower is controlled at 100°C, controlled by the circulating liquid flow. The temperature of the tower bottom is controlled at 150°C, which is controlled by the heating steam volume of the tower bottom. The pressure at the top of the tower is -0.08MPa.

[0030] The bottom liquid of the first rectification tower is sent to the feed port in the middle of the second rectification tower through the liquid extraction pump 1, the tempera...

Embodiment 3

[0035] The raw material of butanol waste liquid is heated to 100°C and enters the first rectification tower from the middle, and the heat of evaporation of the material is provided by the reboiler of the tower kettle. The entrainer benzene is added from the first tray, the flow rate is 0.5Kg / h, and the material temperature is 40°C. After the material extracted from the top of the first rectification tower passes through the decanter for stratification, the upper liquid circulates back to the first rectification tower. The temperature at the top of the tower is controlled at 50°C, controlled by the circulating liquid flow. The temperature of the tower bottom is controlled at 130°C, which is controlled by the heating steam volume of the tower bottom. The pressure at the top of the tower is -0.01MPa.

[0036] The bottom liquid of the first rectification tower is sent to the feed port in the middle of the second rectification tower through the liquid extraction pump 1. The tempera...

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Abstract

The invention discloses a treatment process of 2-ethyl hexanol liquid waste. The treatment process is suitable for processing the 2-ethyl hexanol liquid waste discharged by a 2-ethyl hexanol device. The treatment process comprises the following steps: heating the 2-ethyl hexanol liquid waste to 60-100 DEG C and then leading to a middle section of a first rectifying tower; removing moisture and light components from the top of the first rectifying tower under the effect of an entrainer; enabling tower kettle liquid of the first rectifying tower to enter the middle section of a second rectifying tower, so as to obtain a butanol product of which the purity is greater than 98% from the top of the second rectifying tower; enabling the tower kettle liquid of the second rectifying tower to enter the middle section of a third rectifying tower; removing C5-C7 and an octenal component from the top of the third rectifying tower; and enabling the tower kettle liquid of the third rectifying tower to enter the middle section of a fourth rectifying tower, so as to obtain an octanol product of which the purity is greater than 98% from the top of the fourth rectifying tower. The treatment process does not need any fuel; butanol and octanol, of which the purity is greater than 98%, can be effectively recovered, so that the useful components in the 2-ethyl hexanol liquid waste can be fully utilized; the resources are saved; the environmental pollution is also reduced; the treatment process has good economical benefits and social benefits.

Description

technical field [0001] The invention relates to a butanol waste liquid treatment process, which is a method for separating and extracting high-purity butanol and octanol products from waste liquid discharged from a butanol device; in particular, it relates to a waste liquid discharged from a butanol device Resource utilization processing. Background technique [0002] The low-pressure carbonylation synthesis process of butanol and octanol is that propylene is mixed with synthesis gas (CO+H) in the presence of a rhodium-phosphorus complex catalyst. 2 ) react to form n-butyraldehyde and isobutyraldehyde. After n-butyraldehyde is separated from isobutyraldehyde, it undergoes condensation reaction under the catalysis of sodium hydroxide solution to form octenal, and octenal is hydrogenated under the action of copper catalyst to form octanol (2-ethylhexanol) ; The mixture of n-butyraldehyde and isobutyraldehyde without separation is directly hydrogenated and reduced to generate...

Claims

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Application Information

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IPC IPC(8): C07C29/80C07C31/12C07C31/125
Inventor 赵小平李寒露李鹿野程程远李舵王向伟
Owner SHANGHAI DONGHUA ENVIRONMENT ENG
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