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Process and system for treating industrial normal propyl alcohol waste liquor

A technology of n-propanol and waste liquid, which is applied in natural water treatment, chemical instruments and methods, heating water/sewage treatment, etc. It can solve problems such as rare research and achieve the effect of saving equipment investment.

Inactive Publication Date: 2010-05-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the rectification of n-propanol waste liquid? water azeotrope system

Method used

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  • Process and system for treating industrial normal propyl alcohol waste liquor
  • Process and system for treating industrial normal propyl alcohol waste liquor
  • Process and system for treating industrial normal propyl alcohol waste liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Process such as figure 1 shown. The azeotropic distillation dividing wall column adopts a packed column with a column diameter of 1000 mm and a column height of 14000 mm. Among them, the number of trays in the public rectification section is 10, the number of trays in the dehydration section is 15, and the number of trays in the side stripping section is 15. The cross-sectional area ratio of the dehydration section to the side rectification section is 1.25:1, and the ratio of the mass flow rate of the liquid phase entering the dehydration section (2) to the side stripping section (3) is 4.75:1. The entraining agent used in this example is cyclohexane, and the feed position (counting from top to bottom) of the raw material industrial n-propanol waste liquid is the position between the rectification section and the stripping section of the dehydration section (3). The heavy phase reflux position in the phase separator is the position between the rectificat...

Embodiment 2

[0031] Embodiment 2: flow chart such as figure 1 shown. The azeotropic distillation dividing wall column adopts a packed column with a column diameter of 1200mm and a column height of 14000mm, and the cross-sectional area ratio of the dehydration section (2) and the side stripping section (3) is 1.55:1. The ratio of the mass flow rate of the liquid phase flowing into the dehydration section (2) and the side stripping section (3) from the top of the partition wall (6) is 10.35:1. The number of theoretical plates in each area and the feed position are the same as in Example 1. The feed composition and feed flow rate are shown in Table 2, and diethyl ether is used as the entrainer. The flow rate and composition of each stream are shown in Table 2. The temperature at the top of the tower is 69.2°C; the temperature of the bottom of the dehydration section (2) is 95.3°C; the temperature of the bottom of the side stripping section (3) is 112.5°C; the temperature of the phase separa...

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Abstract

The invention relates to a process and system for treating industrial normal propyl alcohol waste liquor, belonging to the chemical engineering field. The system carries out extractive distillation to the industrial normal propyl alcohol waste liquor via a azeotropic distillation dividing wall column which is formed by vertically arranging a dividing wall extending from the column bottom to the column top in a conventional distillation column, wherein the dividing wall divides the column internal space into three sections (a common distillation section, a side stripping section, and a dewatering section). By adapting the inventive system and process, anhydrous normal propyl alcohol and butanol can be obtained from the column bottom, water can be purified, and noncondensable gas can be secondarily condensed at the column top for low-temperature condensing-recovering. The process can realize the functions of a normal propyl alcohol concentration column, a dewatering column, a entrainer recovering column in only one column thereby cutting out a distillation column and a condenser, further, the azeotropic distillation dividing wall column can avoid the back mixing effect occurring in normal process, and has high thermodynamics efficiency in the process, so that the energy consumption and equipment invest can be greatly reduced, and economic benefit can be improved.

Description

technical field [0001] The invention relates to a process method and device for treating industrial n-propanol waste liquid, in particular to a process method and device for treating industrial n-propanol waste liquid by using an azeotropic rectification dividing wall tower. The device can azeotropically The rectification tower and entrainer recovery tower are integrated into the same tower. Background technique [0002] N-propanol is an important solvent. It can be used in paint solvents, printing inks and cosmetics, as an intermediate in the production of pharmaceuticals and pesticides, and in the production of feed additives and synthetic spices. Propanol is widely used in the pharmaceutical industry, food additives, plasticizers, spices and many other aspects. [0003] The n-propanol waste liquid produced in the industrial production process contains a large amount of water, n-propanol and a part of butanol solution, in addition to a part of non-condensable gas nitroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/36
Inventor 王金福常秋连徐航
Owner TSINGHUA UNIV
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