Azeotropic rectification separation apparatus, azeotropic distillation separation method of n-hexanol, and applications of apparatus and method

A technology of azeotropic distillation and separation device, which is applied in the field of chemical distillation and can solve the problems of serious environmental pollution, high process energy consumption, and human hazards of benzene

Inactive Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional azeotropic distillation process requires the use of entraining agents, such as benzene and other entraining agents. This process consumes a lot of energy, and benzene is more harmful to human body and environmental pollution.

Method used

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  • Azeotropic rectification separation apparatus, azeotropic distillation separation method of n-hexanol, and applications of apparatus and method
  • Azeotropic rectification separation apparatus, azeotropic distillation separation method of n-hexanol, and applications of apparatus and method
  • Azeotropic rectification separation apparatus, azeotropic distillation separation method of n-hexanol, and applications of apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] use as figure 1 The shown azeotropic rectification separation device carries out continuous azeotropic distillation of water-containing n-hexanol, and the azeotropic rectification separation device includes a tower kettle 1, a distillation tower 2, a condensation phase separation unit 3, a tower kettle heating control unit, and a reflux ratio control unit. unit and feed control unit.

[0063] Among them, the tower kettle 1 is provided with an overflow pipe 11, and the overflow pipe 11 is connected to the second product tank 12. The tower kettle 1 is made of double-layer vacuum hard glass material, and is heated by a flat-bottom electric heating method. The heating of the tower kettle 1 passes through The tower kettle heating control unit controls.

[0064] The tower body of distillation tower 2 is provided with 5 feeding ports 21 and 1 is arranged on the sampling port 22 near the tower body bottom, selects the feeding port 21 that is positioned at the middle position o...

Embodiment 2

[0070] Sampling The continuous azeotropic distillation of n-hexanol containing water was carried out with the same device and method as in the examples, except that the feed flow rate was 10 mL / min.

[0071] Sampling from the second product tank 12 was started 1 hour after the feed. The water content of the samples was analyzed and the results are shown in Table 1.

Embodiment 3

[0073] Sampling The continuous azeotropic finishing of n-hexanol containing water is carried out with the same device and method as in the examples, the difference is that the feed flow rate is 20mL / min.

[0074] Sampling from the second product tank 12 was started 1 hour after the feed. The water content of the samples was analyzed and the results are shown in Table 1.

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Abstract

The invention relates to the field of chemical industry rectification, and discloses an azeotropic rectification separation apparatus, an azeotropic distillation separation method of n-hexanol, and applications of the apparatus and the method. The azeotropic rectification separation apparatus comprises a tower kettle, a distillation tower and a condensation phase-separation unit, wherein the condensation phase-separation unit comprises a condensation pipe and a phase separation part, the phase separation part is connected below the condensation pipe, the top portion of the distillation tower is provided with a material introduction pipe for introducing a material exported from the top portion of the distillation tower into the bottom portion of the condensation pipe, and the phase separation part is provided with a reflux pipe for overflowing a light component obtained through the phase separation in the phase separation part to the distillation tower. According to the present invention, with the method, the binary azeotropic mixture formed from n-hexanol and water can be separated without the adding of the azeotropic agent, such that the method has advantages of strong specificity, simple process, low energy consumption and good purification effect, and the recovered n-hexanol can be used as the raw material so as to be reused.

Description

technical field [0001] The invention relates to the field of chemical distillation, in particular to an azeotropic distillation separation device, a n-hexanol azeotropic distillation separation method and applications thereof. Background technique [0002] N-hexanol is a commonly used solvent and analytical reagent, and is also used in the pharmaceutical industry to prepare preservatives and sleeping pills. This product is an edible spice that is allowed to be used according to my country's GB2760-86, and is mainly used to prepare coconut and berry flavors. N-hexanol is a colorless transparent liquid with a boiling point of 157.2°C and a relative density of 0.813g / cm 3 , Soluble in ethanol, ether, acetone, benzene and chloroform, insoluble in water, the solubility in water at 25°C is 6g / L. The constant boiling point of the binary azeotropic mixture formed by n-hexanol and water is 97.8°C. The boiling point of the binary azeotropic mixture is relatively close to that of wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14C07C29/82C07C31/125
CPCB01D3/14C07C29/82C07C31/125Y02P20/50
Inventor 倪黎梁维军朱华元黄小梅王聪慧
Owner CHINA PETROLEUM & CHEM CORP
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