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A new technology has been developed,which can be used for producing more BTX from C 4 and higher alkyl aromatics containing mainly in cracking gasoline and catalytic reforming as well as by products of disproportionating and isomerizing processes.A catalyst consisting of noble metal and zeolite ZSM 5 has been prepared,which possesses higher activity and stability as well as lower hydrogen consumption. It is found that the reaction temperature,reaction pressure,MHSV and H/HC can influence the reaction results,and the proper reaction conditions have been determined.The pilot plant test was conducted successfully with 36%～50% of product BTX.According to the results of the pilot plant test,reaction heat was measured and the schematic flow of the process has been proposed,which is expected to be commercialized in China in 2000. Key words:heavy aromatics;light aromatics;catalyst u001a0 min by HPLC.The calibration lines were linear in the range of 0.5～100 mg/L,and the detection limits (S/N=2) were 0.15,0.20 and 0.16 mg/L for o,m,p-diphenol,respectively.The recoveries of these materials ranged from 96 % to 103 %.RSDs ranged from 1.2 % to 2.5 %.
A new technology has been developed, which can be used for producing more BTX from C4 and higher alkyl aromatics containing mainly in cracking gasoline and catalytic reforming as well as by products of disproportionating and isomerizing processes. A catalyst consisting of noble metal and zeolite ZSM 5 has been prepared, which possesses higher activity and stability as well as lower hydrogen consumption. It is found that the reaction temperature, reaction pressure, MHSV and H / HC can influence the reaction results, and the proper reaction conditions have been determined. pilot plant test was conducted successfully with 36% ~ 50% of product BTX. Accredited to the results of the pilot plant test, reaction heat was measured and the schematic flow of the process has been proposed, which is expected to be commercialized in China in 2000. Key words: heavy aromatics; light aromatics; catalyst u001a0 min by HPLC. The calibration lines were linear in the range of 0.5-100 mg / L, and the detection lim Its Sys (N / N = 2) were 0.15, 0.20 and 0.16 mg / L for o, m, p-diphenol, respectively.The recoveries of these materials ranged from 96% to 103% .RSDs ranged from 1.2% to 2.5%.