Method for producing isopropyl alcohol

Patent metadata

Field	Value
Publication number	US-2024262768-A1
Application number	US-202218560770-A
Country	US
Kind code	A1
Filing date	May 18, 2022
Priority date	May 19, 2021
Publication date	Aug 8, 2024
Grant date	—

Abstract

The present invention aims to provide a method for producing isopropyl alcohol applicable to production of carbon-neutral isopropyl alcohol and capable of efficiently producing isopropyl alcohol with simple operations. The present invention relates to a method for producing isopropyl alcohol, the method including: a step (1) of reacting ethanol and water in the presence of a catalyst to obtain acetone; a step (2) of purifying the acetone; and a step (3) of reducing the acetone to obtain isopropyl alcohol.

First claim

1 . A method for producing isopropyl alcohol, the method comprising:
a step (1) of reacting ethanol and water in the presence of a catalyst to obtain acetone; a step (2) of purifying the acetone; and a step (3) of reducing the acetone to obtain isopropyl alcohol.

2 . The method for producing isopropyl alcohol according to claim 1 ,
wherein a reducing agent used in the step (3) includes hydrogen obtained in the step (1).

3 . The method for producing isopropyl alcohol according to claim 1 , wherein a reducing agent used in the step (3) includes hydrogen obtained in the step (2).

4 . The method for producing isopropyl alcohol according to claim 1 ,
wherein a percentage of an amount of carbon dioxide in all components introduced in the step (3) is less than 10 mol %.

5 . The method for producing isopropyl alcohol according to claim 1 ,
wherein a reducing agent used in the step (3) includes hydrogen obtained in the step (2), and a percentage of an amount of carbon dioxide in all components introduced in the step (3) is less than 10 mol %.

6 . The method for producing isopropyl alcohol according to claim 1 ,
wherein the ethanol is derived from biomass as a raw material.

7 . The method for producing isopropyl alcohol according to claim 6 , the method comprising:
the step (1) of reacting ethanol and water in the presence of a catalyst to obtain acetone; the step (2) of purifying the acetone; and the step (3) of reducing the acetone to obtain isopropyl alcohol, wherein a reducing agent used in the step (3) includes hydrogen obtained in the step (2), and a percentage of an amount of carbon dioxide in all components introduced in the step (3) is less than 10 mol %.

8 . The method for producing isopropyl alcohol according to claim 1 ,
wherein the step (3) of reducing the acetone to obtain isopropyl alcohol is performed in the presence of a catalyst in which a metal element is supported on a support selected from activated carbon, silica, alumina, titania, zirconia, ceria, magnesia, and diatomaceous earth.

9 . The method for producing isopropyl alcohol according to claim 1 ,
wherein a reducing agent used in the step (3) includes hydrogen obtained in the step (2), a percentage of an amount of carbon dioxide in all components introduced in the step (3) is less than 10 mol %, and the step (3) of reducing the acetone to obtain isopropyl alcohol is performed in the presence of a catalyst in which a metal element is supported on a support selected from activated carbon, silica, alumina, titania, zirconia, ceria, magnesia, and diatomaceous earth.

10 . The method for producing isopropyl alcohol according to claim 1 ,
wherein the step (1) of reacting ethanol and water in the presence of a catalyst to obtain acetone is performed in the presence of a catalyst containing one or more elements selected from alkali metals, alkaline earth metals, iron, manganese, zinc, copper, aluminum, and zirconium.

11 . The method for producing isopropyl alcohol according to claim 1 ,
wherein the step (1) of reacting ethanol and water in the presence of a catalyst to obtain acetone is performed in the presence of a catalyst containing iron and zirconium, the catalyst containing the zirconium in an amount of 0.2 to 2.0 mol per mole of the iron.

12 . The method for producing isopropyl alcohol according to claim 1 ,
wherein a catalyst used in the step (3) includes a Ru-containing catalyst.

13 . The method for producing isopropyl alcohol according to claim 1 ,
the method further comprising a step (4) of purifying hydrogen contained in the gas phase component obtained in the step (2), wherein a molar ratio of hydrogen/carbon dioxide in a hydrogen-rich composition obtained in the step (4) is 90:10 or more.

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Okamura Junji

Classifications

• C07C45/82

  by distillation · CPC title

• C07C45/783

  by gas-liquid treatment, e.g. by gas-liquid absorption · CPC title

• C07C45/45

  by condensation · CPC title

• C07C29/145 Primary

  with hydrogen or hydrogen-containing gases · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title