1Edwards William R, Boynton Harry G. Pierri Jr William G De. Recovery of 1,3,5 - trimethylbenzene by alkylation of C9 isomers with aluminum chloride [P]. US:3052741,1962 - 09 - 04.
2Wang Yushan. Catalytic alkylating separation process of mixed C9 arene to prepare high- purity s -trimethyl-benzene [P]. CN: 1269342,2000 - 10 - 11.
3Peng Bai. Sym- trimethylbenzene producing method by separating mixed C9 arene [ P ]. CN: 1139095,1997 - 01-01 .