Preparation method and application of carbon-based sulfur hydrolysis catalyst

By mixing and dissolving sulfolane, monopropanolamine, and tripropanolamine in a specific ratio and controlling the temperature in the absorption tower with dual temperature zones, the temperature contradiction between carbon disulfide hydrolysis and product absorption in traditional technologies is solved, achieving efficient organic sulfur conversion and resource recovery, and improving the efficiency and resource utilization of industrial waste gas treatment.

CN121490545AActive Publication Date: 2026-02-10XIAMEN ADIT ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202610012922.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-07
Publication Date
2026-02-10
Estimated Expiration
2046-01-07

AI Technical Summary

Technical Problem

Existing technologies for treating industrial waste gas containing carbon disulfide have limited solubility in traditional alkanolamine solutions, making it difficult to simultaneously achieve hydrolysis catalysis and absorption of acidic products. Furthermore, temperature control strategies cannot simultaneously achieve efficient hydrolysis of carbon disulfide and efficient absorption of hydrogen sulfide and carbon dioxide, resulting in incomplete organic sulfur conversion and low resource utilization.

Method used

A specific ratio of sulfolane, monopropanolamine, and tripropanolamine is mixed and dissolved, and combined with dual-temperature zone control in the absorption tower, the lower high-temperature zone catalyzes the hydrolysis of carbon disulfide, while the upper low-temperature zone absorbs the products, achieving a synergistic effect of gas-liquid mass transfer efficiency and chemical reactivity. The catalyst is then regenerated through high-temperature negative pressure desorption.

Benefits of technology

The efficient hydrolysis of carbon disulfide and the efficient absorption of hydrogen sulfide and carbon dioxide were achieved in a single absorption tower, which improved the conversion rate and resource recovery rate of organic sulfur and solved the problems of temperature contradiction and resource waste in traditional technologies.

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Abstract

The invention relates to the technical field of gas purification and chemical catalysts, and discloses a preparation method and application of a carbon-based sulfur hydrolysis catalyst, and the preparation method comprises the following steps: preparing the carbon-based sulfur hydrolysis catalyst from sulfolane, monopropanolamine, tripropanolamine and water through temperature-controlled mutual dissolution and precise filtration; the application method of the carbon-based sulfur hydrolysis catalyst comprises the following steps: spraying the carbon-based sulfur hydrolysis catalyst into an absorption tower, and constructing a double-temperature area in the absorption tower; maintaining high temperature in the lower area of the absorption tower, and catalyzing carbon disulfide and carbon sulfide to hydrolyze by utilizing monopropanolamine; the upper area of the absorption tower is kept at low temperature, tripropanolamine is used for absorbing hydrogen sulfide and carbon dioxide, the carbon-based sulfur hydrolysis catalyst absorbing gas is conveyed to a desorption tower, hydrogen sulfide and carbon dioxide are desorbed through high temperature and negative pressure to serve as product gas, and a regenerated solution is recycled. The method provided by the invention solves the contradiction between carbon disulfide hydrolysis and product absorption, and realizes conversion and resource recovery of organic sulfur.
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