| 摘要 |
PCT No. PCT/JP95/00061 Sec. 371 Date Oct. 5, 1995 Sec. 102(e) Date Oct. 5, 1995 PCT Filed Jan. 20, 1995 PCT Pub. No. WO95/21816 PCT Pub. Date Aug. 17, 1995In preparing an acyloxybenzenesulfonic acid or salts thereof by sulfonating the corresponding acyloxybenzene (1), the preparation process of the acyloxybenzenesulfonic acid wherein as an additive is added at least one selected from among carboxylic acids or esters thereof (2), alkyl phosphates (3), polyphosphoric acids (4), amides and like compounds (6), carbonic esters (7), and hydroxy compounds (8). By the process, acyloxybenzenesulfonic acid excellent in hue can be prepared on an industrial scale in an enhanced yield at enhanced selectivity and lowered cost as compared with the processes of the prior art.
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