Sodium citrate was used as a complex catalyst for the titanium trichloride to reduce insoluble azo dyes and pigments in acetonitrile-alcohol-water system.

• 本文提出了在乙腈-乙醇-水混合溶剂中以柠檬酸钠作络合剂,三氯化钛还原非水溶性偶氮染料和颜料。