Activating agent of gas oil sweetening catalyst

Abstract

The invention relates to an activating agent of a gas oil sweetening catalyst, which belongs to the field of chemical engineering, aims at overcoming the shortcomings of the gas oil alkali-free fixed bed sweetening process and is high in efficiency. The activating agent is composed of the following raw materials by weight: 95% ethanol, sodium hydroxide, chlorinated octadecyl dimethyl benzyl ammonium, tetramethylguanidine and N-methyldiethanolamine. The activating agent has the advantages of being good in intersolubility with gas oil and high in mercaptan conversion rate, having good washing effects on colloid and aromatic hydrocarbon substances which are adsorbed on the surface of a bed catalyst, being capable of maintain high activity state accordingly, prolonging service, having no bad effects on performance of oil if retained in the oil, being an environment-friendly product for cleaning and being simple in manufacture process, less in dosage of chlorinated octadecyl dimethyl benzyl ammonium in raw material components and low in preparation cost.

Description

technical field [0001] The invention belongs to the field of chemical industry. Background technique [0002] Crude oil often contains different amounts of sulfides, and sulfides still exist in various distillates obtained after vacuum distillation in refineries. Among them, sulfides in gasoline fractions are mainly mercaptans and hydrogen sulfide. The presence of mercaptan in gasoline not only produces stench, but also leads to the decline of oil storage stability and quality; mercaptan has weak acidity and is corrosive to production and storage equipment and pipelines, causing equipment safety hazards and equipment damage Mercaptans are extremely harmful to humans and the environment. After people inhale a small amount of air containing mercaptans, they will immediately feel headache and nausea, and severe cases will lead to coma and death. Therefore, sulfides such as mercaptans must be removed during petroleum refining. [0003] At present, most of the FCC gasoline swee...

AI Technical Summary

Problems solved by technology

With the development of alkali-free desulfurization process, most refineries now use activated carbon preloaded with sweetening catalyst as a fixed-bed catalyst, and quaternary ammonium salt as an activator can no longer adapt to this process