Our company has developed a new type of liquefied gas desulfurization synergist to solve the problems of poor desulfurization effect of alkali liquor and low regeneration efficiency of liquefied gas desulfurization device. This agent is a composite homogeneous catalyst containing a variety of highly active components such as a mercaptan phase transfer catalyst, a mercaptan oxidation catalyst, a carbonyl sulfide hydrolysis catalyst, etc., which can significantly improve the efficiency of lye desulfurization and thiol-containing lye regeneration, and the overall performance Reach the leading domestic level.