Verfahren zur Rückgewinnung verbrauchter fluorierter Sulfansäure-Katalysatoren für ein Alkylierungsverfahren

摘要

Process for the recovery of fluorinated sulphonic acid catalyst from tar being formed during alkylation of hydrocarbons in the presence of the fluorinated sulphonic acid catalyst and containing spent fluorinated sulphonic acid catalyst in form of salts with basic components in the tar, which process comprises, treating the tar with a proton donating acid by mixing of the acid and the tar, thereby, converting the spent catalyst to the fluorinated sulphonic acid; separating the obtained fluorinated sulphonic acid from the tar-acid mixture by stripping off the acid from the mixture with an inert stripping agent at a temperature of 0-200C and pressure of 0.001-1 atm; and finally recovering the separated fluorinated sulphonic acid from the stripping agent.