Process for the preparation of acyloxybenzenesulphonates

摘要

A process is described for the preparation of acyloxybenzenesulphonates which are optionally substituted on the benzene ring. Liquid acyloxybenzene which is optionally substituted on the benzene ring is brought into contact with a gas mixture containing 1 to 7% by volume of SO3 at 20 to 200 DEG C. When 1 mol of the acyloxybenzene which is optionally substituted on the benzene ring has taken up 0.9 to 1.3 mol of SO3, SO3-feeding is stopped, the liquid is held at a temperature of 20 to 70 DEG C for 5 to 180 minutes and then neutralised. In this manner, acyloxybenzenesulphonates which is optionally substituted on the benzene ring can be prepared in good quality and good yield without solvents and without it being necessary to remove troublesome reaction products.