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Novel method for recovering residual butyl alcohol-octyl alcohol

A new method and residual liquid technology, applied in the field of recovering butanol-octanol residual liquid, can solve the problems affecting the product purity, color and recovery rate of the recovery system, and achieve the effect of high flexibility

Inactive Publication Date: 2019-02-26
乐陵齐青化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously affect the purity, color and recovery rate of products in the recovery system

Method used

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  • Novel method for recovering residual butyl alcohol-octyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 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.

[0018] The pressure at the top of the first rectification tower is 0.02Mpa~-0.06Mpa, the temperature at the top of the tower is 60~110°C, and the temperature at the bottom of the tower is 100°C~180°C

[0019] The still liquid of the fir...

Embodiment 2

[0025] 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.

[0026] 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

[0032] 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.

[0033] 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 tempe...

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Abstract

The invention provides a novel method for recovering residual butyl alcohol-octyl alcohol. According to the method, in a first rectifying tower (namely a butyraldehyde tower), butyraldehyde and butylalcohol are separated, at the same time, dehydration is carried out; butyl alcohol is extracted out from the top of a second rectifying tower, the purity of extracted butyl alcohol should be greater than 98 wt.%; all C5-C7 components such as butyl butyrate are extracted out from the top of a third rectifying tower; octyl alcohol and octenal are extracted out from the top of a fourth rectifying tower, and the purity of octyl alcohol is more than 98 wt.%.

Description

technical field [0001] The present invention is mainly applied to butanol production enterprises, and specifically relates to a new method for recovering butanol raffinate. Background technique [0002] In my country's oxo-methanol production of butanol and octanol, due to process requirements, about several tons of waste liquid containing butyraldehyde, butanol, octanol and polymers are discharged per hour, commonly known as butanol raffinate. The waste liquid is burned as boiler fuel, but the waste liquid contains phosphide, which is harmful to the boiler equipment and cannot be used. If the waste liquid is discharged, it will cause serious environmental pollution, and national laws and regulations do not allow it. The main components in butanol waste liquid are water, n-butanol, isobutanol, butyraldehyde, isobutyraldehyde, octenal (EPA), octanol, and a small amount of light components, 2-ethylhexanal (EHA ), triphenylphosphine, triphenylphosphine oxide and other substance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/80C07C31/12C07C31/125C07C45/82C07C47/02C07C47/21B01D3/14
CPCC07C29/80B01D3/146C07C45/82C07C31/12C07C31/125C07C47/02C07C47/21
Inventor 张耿智
Owner 乐陵齐青化工有限公司
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