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Separation and purification method of water-containing isopropanol

A technology of water-containing isopropanol and a purification method, which is applied in the field of separation and purification of chemical products, can solve the problems of large investment, high energy consumption and material consumption, and achieve the effects of low energy consumption and simple production process

Active Publication Date: 2017-08-08
天津九源化工工程有限公司
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  • Abstract
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Problems solved by technology

Therefore, it is difficult to obtain isopropanol products with a water content lower than the azeotropic composition under ordinary rectification operating conditions. Generally, special rectification and other methods are used to remove azeotropic water to obtain isopropanol products with a water content of ≤0.5wt%. , but special distillation and other methods consume a lot of energy and materials, and the investment is relatively large

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  • Separation and purification method of water-containing isopropanol

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Embodiment 1

[0042] In this embodiment, the isopropanol raw material liquid with a water content of 1 wt% is used to produce an isopropanol product with a water content of 0.05 wt%. For the operation steps of the separation and dehydration method, please refer to a schematic flow chart of a separation and purification method for aqueous isopropanol ( figure 1 ), mainly including equipment isopropanol dehydration tower 1, reboiler 2, superheater 3, regeneration condensate preheater 4, adsorber 5A / 5B, isopropanol product condenser 6, raw material preheater 7, isopropanol Propanol product tank 8, regeneration condenser 9, regeneration condensate tank 10, etc., are provided with valves and corresponding pipelines between each equipment, and the specific operations are described as follows:

[0043] The aqueous isopropanol raw material liquid is first preheated by the raw material preheater and then sent to the top feed port of the isopropanol dehydration tower. The preheating temperature of the...

Embodiment 2

[0050] In this embodiment, the isopropanol raw material liquid with a water content of 20wt% is used to produce an isopropanol product with a water content of 0.5wt%. For the operation steps of the separation and dehydration method, see a schematic flow chart of a separation and purification method for aqueous isopropanol ( figure 1 ), mainly including equipment isopropanol dehydration tower 1, reboiler 2, superheater 3, regeneration condensate preheater 4, adsorber 5A / 5B, isopropanol product condenser 6, raw material preheater 7, isopropanol Propanol product tank 8, regeneration condenser 9, regeneration condensate tank 10, etc. are provided with valves and corresponding pipelines between each equipment, and the specific operations are described as follows:

[0051] The aqueous isopropanol raw material liquid is first preheated by the raw material preheater and then sent to the top feed port of the isopropanol dehydration tower. The preheating temperature of the aqueous isopro...

Embodiment 3

[0058] In this embodiment, the isopropanol raw material solution with a water content of 15wt% is used to produce an isopropanol product with a water content of 0.1wt%. For the operation steps of the separation and dehydration method, see Figure 1 A kind of separation and purification process flow diagram of water-containing isopropanol ( figure 1 ), mainly including equipment isopropanol dehydration tower 1, reboiler 2, superheater 3, regeneration condensate preheater 4, adsorber 5A / 5B, isopropanol product condenser 6, raw material preheater 7, isopropanol Propanol product tank 8, regeneration condenser 9, regeneration condensate tank 10, etc. are provided with valves and corresponding pipelines between each equipment, and the specific operations are described as follows:

[0059] The aqueous isopropanol raw material liquid is first preheated by the raw material preheater and then sent to the top feed port of the isopropanol dehydration tower. The preheating temperature of t...

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Abstract

The invention relates to a separation and purification method of water-containing isopropanol. The method is characterized by producing isopropanol products with water content of 0.05-0.5wt% by using an isopropanol raw material solution with water content of 1-20wt%. A multifunctional isopropanol dewatering tower with integrated functions of evaporating the isopropanol raw material solution, regenerating, condensating, dewatering and concentrating water-rich isopropanol, fillers, a plate type tower compound rectifying tower and techniques such as pressure-swing adsorption and multilevel multi-effect utilization of energy are used for implementing a production process of producing isopropanol products with low water content by using the isopropanol raw material solution with water concentration close to azeotropic composition. The production process is simple and is low in energy consumption; the technical problems of high energy consumption, high material consumption and high investment caused by methods such as special distillation in an operation of refining the water-containing isopropanol raw material solution which is essentially composed of isopropanol and azeotropic water to remove the azeotropic water are effectively solved; the separation and purification method of water-containing isopropanol has good market promotion prospects.

Description

technical field [0001] The invention relates to a method for separating and purifying water-containing isopropanol, which solves the problems of high energy consumption and material consumption in obtaining isopropanol products with a water content of ≤0.5wt% by using special rectification and other methods to remove azeotropic water. Technical field It belongs to the technical field of separation and purification of chemical products Background technique [0002] Isopropyl Alcohol (IPA) is an important chemical raw material with a boiling point of 82.45 ° C. As an excellent organic solvent, industrial cleaning agent and fuel antifreeze, it is widely used in chemical industry, energy, electronics and in the pharmaceutical industry. In industrial applications, the product purity of isopropanol, especially the water content, is usually put forward higher requirements, and its product refining and purification technology has been paid attention to. At present, the method for ...

Claims

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Application Information

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IPC IPC(8): C07C29/80C07C31/10
CPCC07C29/80C07C31/10
Inventor 耿中峰李永辉时锋吕惠生
Owner 天津九源化工工程有限公司
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