Korea Institute of Science and Technology

He Won Lee

Hyun Joo Lee

Ung Lee

Hong Gon Kim

Kyeong Su Kim

Shinhye Cho

Tran Huyen Dang

Seok Hyeon Cheong

Jae Hyung Im

Disclosed is a methanol and sulfuric acid co-production system capable of producing methanol and sulfuric acid in equal equivalents. Specifically, the system includes an oxidation reaction unit configured to produce methyl bisulfate (CHOSOH) by reacting methane gas with an acid solution in the presence of a catalyst, a reactive distillation unit disposed downstream of the oxidation reaction unit and configured to esterify methyl bisulfate (CHOSOH) supplied from the oxidation reaction unit with trifluoroacetic acid (CFCOOH) to obtain a product and to separate the product into methyl trifluoroacetate (CFCOOCH) and sulfuric acid (HSO) through thermal distillation, and a hydrolysis reaction unit disposed downstream of the reactive distillation unit and configured to produce methanol by hydrolyzing methyl trifluoroacetate (CFCOOCH) supplied from the reactive distillation unit, in which the reactive distillation unit recirculates the sulfuric acid resulting from separation to the oxidation reaction unit.

Methanol and sulfuric acid co-production system

A method for producing a methanol precursor, methyl trifluoroacetate, having high-purity includes the steps of (a) preparing methyl bisulfate by mixing a catalyst with an acid solution comprising a sulfur-containing acid to provide a first mixture and supplying methane gas to the first mixture to prepare the methyl bisulfate; and (b) preparing methyl trifluoroacetate (CFCOCH) by adding trifluoroacetic acid (CFCOH) to the first mixture including the methyl bisulfate to provide a second mixture and distilling the second mixture under heating to prepare, separate and purify the methyl trifluoroacetate (CFCOCH). Methanol may be produced by adding water to the methyl trifluoroacetate (CFCOCH). A methyl ester represented by Formula 2 below may be produced by adding a carboxylic acid represented by Formula 1 below to the methyl trifluoroacetate (CFCOCH):RCOH&#x2003;&#x2003;(1),

Methods for producing a methanol precursor, methanol, and a methyl ester from methane in high purities

A sulfur dioxide absorbent that is an ionic liquid including a solvent; and a salt of a diamine compound that is substituted with a hydroxyl group and has a chemical formula 1 to 3 below dissolved in the solvent: 

Sulfur dioxide absorbent is an ionic liquid including a salt of a diamine compound that is substituted with a hydroxyl group

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Seoul, South Korea

He Won Lee