| 摘要 |
A process for the production of anthraquinone-1-sulphonic acid by sulphonating anthraquinone with a sulphonating agent in the presence of palladium catalyst in a solvent, is characterized in that before sulphonation, the palladium is mixed with nitric acid or mineral acids containing nitric acid at room temperature and then the acid is removed from the treated palladium. Preferably, the sulphonating agent of 1-10% SO3 is first mixed with the nitric acid treated palladium as a solvent, and the same sulphonating agent of 50-65% SO3 is added for sulphonation at about 90-100 degs. C.
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