Preparation method of isopropanol

A technology of isopropanol and propylene, which is applied in the field of preparation of isopropanol, can solve problems such as the complex follow-up process of propylene monomer, achieve the effects of reducing equipment maintenance costs, promoting positive reactions, and reducing investment costs

Active Publication Date: 2022-03-11
LG CHEM LTD
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  • Summary
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Problems solved by technology

However, even in this case, a large amount of energy is used to condense the gas phase reaction products, a large amount of energy is used in the reboiler of the stripping column, and since about 1 to 2% by weight of propylene monomer is still removed from the The bottom of the tower leaks, so a complicated post-process for recovering the leaked propylene monomer is still required

Method used

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  • Preparation method of isopropanol
  • Preparation method of isopropanol
  • Preparation method of isopropanol

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preparation example Construction

[0028] According to an exemplary embodiment of the present invention, there is provided a method for preparing isopropanol, the method comprising: supplying a supply stream comprising propylene monomer and water to a reaction unit, so that the propylene monomer and water react with each other, thereby A reaction product comprising isopropanol, propylene monomer and water is produced; the first discharge stream comprising the gaseous reaction product discharged from the reaction unit and the second discharge stream comprising the liquid phase reaction product discharged from the reaction unit are Each is supplied to a stripper 200; and a top discharge stream comprising propylene monomer and a bottom discharge stream comprising water and isopropanol are separated from the stripper 200, wherein the first discharge stream passes through a first heat exchanger 310 is condensed and supplied to the stripper 200 in the liquid phase.

[0029] According to an exemplary embodiment of the...

example 1

[0054] like figure 1 As shown in the process flow diagram shown in , isopropanol (IPA) is prepared and the unreacted product and isopropanol are separated.

[0055] Specifically, feed the supply flow to 40kg / cm at a flow rate of 134ton / hr 2 Reactor 100 working at a pressure of g, and will supply the water in the stream (H 2 The ratio of O) to propylene monomer (PP) is controlled to be 0.4. In this case, the supply stream passes through the second heat exchanger 320 and is then supplied to the reactor 100 .

[0056] The discharge stream of the reactor 100 is separated into a first discharge stream and a second discharge stream while passing through the second heat exchanger 320 and then discharged, and the first discharge stream is condensed in the first heat exchanger 310 and then supplied to the steam The 1st rung of Titta 200. In addition, the second effluent stream is fed to the fifth stage of the stripper 200 .

[0057] The stripper 200 operates at atmospheric pressu...

example 2

[0060] like figure 2 As shown in the process flow diagram shown in , isopropanol is prepared and the unreacted product and isopropanol are separated.

[0061]Specifically, feed the supply flow to 40kg / cm at a flow rate of 134ton / hr 2 The reactor 100 was operated at a pressure of g, and the ratio of water to propylene monomer in the feed stream was controlled to be 0.4. In this case, the supply stream passes through the second heat exchanger 320 and is then supplied to the reactor 100 .

[0062] The effluent stream of the reactor 100 is separated into a first effluent stream and a second effluent stream while passing through the second heat exchanger 320 and then discharged, and the first effluent stream is condensed in the first heat exchanger 310 and then fed to the stripper 1st rung of tower 200. In addition, the second effluent stream is fed to the fifth stage of the stripper 200 . In this case, a separate condenser (not shown) is arranged to further condense the uncon...

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Abstract

The present invention relates to a method for producing isopropanol, the method comprising: supplying a supply stream comprising a propylene monomer and water to a reaction unit to cause the propylene monomer and water to react with each other, thereby producing a reaction product comprising isopropanol, propylene monomer and water; feeding each of a first discharge stream comprising a gas-phase reaction product discharged from the reaction unit and a second discharge stream comprising a liquid-phase reaction product discharged from the reaction unit to a stripping column; and separating from the stripping column a top drain stream comprising propylene monomer and a bottom drain stream comprising water and isopropanol wherein the first drain stream is condensed through a first heat exchanger and fed to the stripping column in a liquid phase.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2020-0076555 filed on June 23, 2020, the entire contents of which are incorporated herein by reference. technical field [0003] The invention relates to a method for preparing isopropanol, more particularly, to a method for separating isopropanol from reaction products with high purity and effectively recovering unreacted products in the isopropanol preparation process. Background technique [0004] In the electronics industry for manufacturing semiconductors or liquid crystal displays (LCDs), isopropyl alcohol (IPA: isopropylalcohol) has been used in various applications including applications such as cleaning agents. [0005] The isopropanol production process uses, for example, propylene and water as raw materials. In this case, propylene reacts with water to form isopropanol. [0006] The reaction product in the isopropano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A99Z99/00
CPCC07C29/04C07C29/80C07C31/10C07C29/78
Inventor 朴谢恩金台雨李成圭
Owner LG CHEM LTD
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