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Device and method for separating isopropanol and diisopropyl ether mixture

A technology of diisopropyl ether and isopropanol, which is applied in the field of rectification and separation, can solve the problems of high energy consumption and achieve the effect of reducing energy consumption and high-efficiency separation

Inactive Publication Date: 2017-05-31
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the disadvantage of high energy consumption of the existing pressure swing rectification separation system of isopropanol-diisopropyl ether, the present invention provides a self-heat recovery pressure swing rectification separation device and process of isopropanol-diisopropyl ether system

Method used

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  • Device and method for separating isopropanol and diisopropyl ether mixture

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Effect test

Embodiment 1

[0048] Low-pressure column 1 is filled with 500Y structured packing, with 19 trays, the first feed port is the 12th plate, the second feed port is the 10th plate, the operating pressure is 0.1MPa, and the tower top temperature is 66 °C, the temperature of the tower bottom is 84.7 °C, and the compression ratio of the compressor 10 is 2.6. High pressure column 2 is filled with 500Y structured packing, the number of trays is 27, the third feed port is the 19th tray, the operating pressure is 0.4MPa, the temperature at the top of the tower is 110.8°C, the temperature at the bottom of the tower is 120.1°C, the compressor 11 has a compression ratio of 1.8.

[0049] The feed rate of the raw material solution containing the mixture of isopropanol and diisopropyl ether is 7061 kg / h, and the composition of the raw material solution is: 63.8% of isopropanol and 36.2% of diisopropyl ether (mass percentage).

[0050] The raw material liquid containing isopropanol-diisopropyl ether mixture...

Embodiment 2

[0052] Low-pressure column 1 is filled with 500Y structured packing, with 24 trays, the first feed inlet is the 15th tray, the second feed inlet is the 12th tray, the operating pressure is 0.1MPa, and the tower top temperature is 66 °C, the temperature of the tower bottom is 85.1 °C, and the compression ratio of the compressor 10 is 2.8. High-pressure tower 2 is filled with 500Y-type structured packing, with 30 trays, the third feed port is the 21st tray, the operating pressure is 0.45MPa, the temperature at the top of the tower is 115.1°C, the temperature at the bottom of the tower is 125.2°C, the compressor 11 has a compression ratio of 2.

[0053] The feed rate of the raw material solution containing the mixture of isopropanol and diisopropyl ether is 7061 kg / h, and the composition of the raw material solution is: 63.8% of isopropanol and 36.2% of diisopropyl ether (mass percentage).

[0054] The raw material liquid containing isopropanol-diisopropyl ether mixture is prehe...

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Abstract

The invention discloses a device and method for separating an isopropanol and diisopropyl ether mixture, and belongs to the technical field of rectification. An azeotropic steam material extracted from the top of a low-pressure tower is pressurized and heated by a compressor and then provides heat required by reboiling for a column kettle of the low-pressure tower, condensation of azeotropic steam of the low-pressure tower is completed, an azeotropic steam material extracted from the top of a high-pressure tower is pressurized and heated by the compressor and then provides heat required by reboiling for a column kettle of the high-pressure tower, and condensation of azeotropic steam of the high-pressure tower is completed. Compared with traditional schemes that cooling water is used for achieving tower-top material condensation and public heating projects are used for column kettle heating, waste heat of the materials at the bottoms of the high-pressure and low-pressure towers is used for pre-heating of materials and intermediate products, accordingly heat matching in a system is achieved, input of outside public heating projects is not needed, consumed energy and generated cost of the compressor are much lower than the traditional cooling water and the public heating projects, and good economic benefits are generated.

Description

technical field [0001] The invention relates to rectification separation technology, in particular to a device and process for separating isopropanol-diisopropyl ether mixture. Background technique [0002] Isopropanol (IPA) is one of the earliest petrochemical products produced in the world. It is mainly used for the production of acetone and as a solvent. IPA is also used for the synthesis of glycerin, isopropyl acetate, isopropylamine salt, nitrous acid A raw material for products such as diisopropylamine, isopropanol is also widely used as an antifreeze additive for petroleum fuels. In addition, isopropanol can also be used in the manufacture of fungicides, insecticides, disinfectants and preservatives. [0003] The production of isopropanol uses propylene and water as raw materials, using acidic or cationic exchange resin catalysts, and hydrating to generate isopropanol. During the production of isopropanol, a large number of by-products containing diisopropyl ether a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/74C07C29/82C07C31/10C07C41/34C07C41/42C07C43/04B01D3/14B01D3/32
CPCB01D3/143B01D3/32C07C29/74C07C29/82C07C41/34C07C41/42C07C31/10C07C43/04
Inventor 叶青夏慧冯申尧吴卫忠
Owner CHANGZHOU UNIV
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