Efficient conversion of H2S into mercaptan alcohol by tertiary-amine functionalized ionic liquids

The resource utilization of hydrogen sulfide (H2S) is of great significance in natural gas chemical industry. Described herein have developed a novel method mediated in tertiary amine-functionalized ionic liquids (ILs) to convert H2S into mercaptan alcohols with enols. The effect of ILs, substrate scope, and regeneration experiments have been investigated. It is found that the conversion of 3-methyl-2-buten-1-ol by H2S can reach 52% with a 50% (mol) catalyst loading of bis(2-dimethylaminoethyl) ether methoxyacetate within 12 hat 90 degrees C. The reaction mechanism was speculated based on theoretical calculation. Besides, a plausible reaction-separation-integrated strategy was further proposed. This work reveals an effective insight into the capture and catalytic conversion of H2S to high valuable mercaptan alcohol, which makes the utilization method of H2S resource universal and has the potentiality for industrial application. (c) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

Automated summary

A novel method utilizing ionic liquids to convert H2S into mercaptan alcohols and enols has been developed in this study, showing high efficiency and industrial application potential.