An object of the present invention is to provide a chemical liquid purification method which makes it possible to obtain a chemical liquid having excellent defect inhibition performance. Another object of the present invention is to provide a chemical liquid. The chemical liquid purification method according to an embodiment of the present invention is a chemical liquid purification method including obtaining a chemical liquid by purifying a substance to be purified containing an organic solvent, in which a content of the stabilizer in the substance to be purified with respect to the total mass of the substance to be purified is equal to or greater than 0.1 mass ppm and less than 100 mass ppm.

A method for preparing isopropyl alcohol including: feeding a feed stream containing a propylene monomer and water to a reaction unit, where the propylene monomer and the water react to form a reaction product containing isopropyl alcohol, the propylene monomer, and the water; feeding each of a first discharge stream and a second discharge stream discharged from the reaction unit to a stripper, where the first discharge stream contains a vapor-phase reaction product, which is condensed through a first heat exchanger and fed to the stripper in a liquid-phase, and wherein the second discharge stream contains a liquid-phase reaction product; and separating a top discharge stream and a bottom discharge stream from the stripper, wherein the top discharge stream contains the propylene monomer and the bottom discharge stream contains the water and the isopropyl alcohol.

A method for preparing isopropyl alcohol including: feeding a feed stream containing a propylene monomer and water to a reaction unit, where the propylene monomer and the water react to form a reaction product containing isopropyl alcohol, the propylene monomer, and the water; feeding each of a first discharge stream and a second discharge stream discharged from the reaction unit to a stripper, where the first discharge stream contains a vapor-phase reaction product, which is condensed through a first heat exchanger and fed to the stripper in a liquid-phase, and wherein the second discharge stream contains a liquid-phase reaction product; and separating a top discharge stream and a bottom discharge stream from the stripper, wherein the top discharge stream contains the propylene monomer and the bottom discharge stream contains the water and the isopropyl alcohol.

The present disclosure relates to a catalyst composition comprising copper and iron on a support for use in a process for the synthesis of higher alcohols from a syngas feed stream comprising hydrogen and carbon monoxide, the catalyst composition being remarkable in that the support is one or more zeolite, in that the total content of iron and copper is ranging from 1 to 10 wt. % based on the total weight of the catalyst composition and as determined by inductively coupled plasma optical emission spectroscopy, in that the Cu/Fe bulk molar ratio is ranging from 1.1:1.0 to 5.0:1.0 as determined by XRF spectroscopy.

The present disclosure relates to a catalyst composition comprising copper and iron on a support for use in a process for the synthesis of higher alcohols from a syngas feed stream comprising hydrogen and carbon monoxide, the catalyst composition being remarkable in that the support is one or more zeolite, in that the total content of iron and copper is ranging from 1 to 10 wt. % based on the total weight of the catalyst composition and as determined by inductively coupled plasma optical emission spectroscopy, in that the Cu/Fe bulk molar ratio is ranging from 1.1:1.0 to 5.0:1.0 as determined by XRF spectroscopy.

Provided are: a semiconductor treatment liquid comprising high-purity isopropyl alcohol, wherein the concentration of the oxolane compound expressed in formula (1) below when held for 60 days in a nitrogen atmosphere at 50° C. in a SUS304 container is 25 ppb or less on a mass basis in relation to the isopropyl alcohol; and a method for manufacturing said semiconductor treatment liquid. In the formula, R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a C1-3 alkyl group, and the total number of carbon atoms in R.sup.1 and R.sup.2 is 3 or less. R.sup.3 represents a hydrogen atom or an isopropyl group.

Provided are: a semiconductor treatment liquid comprising high-purity isopropyl alcohol, wherein the concentration of the oxolane compound expressed in formula (1) below when held for 60 days in a nitrogen atmosphere at 50° C. in a SUS304 container is 25 ppb or less on a mass basis in relation to the isopropyl alcohol; and a method for manufacturing said semiconductor treatment liquid. In the formula, R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a C1-3 alkyl group, and the total number of carbon atoms in R.sup.1 and R.sup.2 is 3 or less. R.sup.3 represents a hydrogen atom or an isopropyl group.

A purification processing apparatus for supplying purified isopropyl alcohol to a substrate processing apparatus. The purification processing apparatus includes: a processing chamber in which unpurified isopropyl alcohol and ionic liquid are mixed, and the isopropyl alcohol and the ionic liquid are separated to purify the isopropyl alcohol; an unpurified solvent supply port configured to supply the unpurified isopropyl alcohol to the processing chamber; an ionic liquid supply port configured to supply the ionic liquid to the processing chamber; and a purified solvent outlet configured to supply the purified isopropyl alcohol from the processing chamber to the substrate processing apparatus.

A purification processing apparatus for supplying purified isopropyl alcohol to a substrate processing apparatus. The purification processing apparatus includes: a processing chamber in which unpurified isopropyl alcohol and ionic liquid are mixed, and the isopropyl alcohol and the ionic liquid are separated to purify the isopropyl alcohol; an unpurified solvent supply port configured to supply the unpurified isopropyl alcohol to the processing chamber; an ionic liquid supply port configured to supply the ionic liquid to the processing chamber; and a purified solvent outlet configured to supply the purified isopropyl alcohol from the processing chamber to the substrate processing apparatus.

A process for producing propylene in which a first material stream is provided using a steam cracking method and one or more fractionations and is rich in ethylene, in which a second material stream containing carbon monoxide and hydrogen is provided using a synthesis gas production method, and in which at least a part of the ethylene from the first material stream is reacted with at least a part of the carbon monoxide and the hydrogen from the second material stream to form an aldehyde using a hydroformylation to obtain a third material stream, and in which at least a part of the aldehyde in the third material stream is converted to the propylene, wherein the ethylene is provided by means of the steam cracking method in a first component mixture, wherein the propylene is provided in a second component mixture.