| 摘要 |
1283659 Isomerizing alkyl aromatics CHEVRON RESEARCH CO 7 Jan 1971 [14 Jan 1970] 886/71 Heading C5E A poly C 1 -C 3 alkylaromatic hydrocarbon is isomerized at 700-1000‹ F., 0À1-10 LHSV and a pressure below 200 p.s.i.g. using a catalyst comprising a SiO 2 -Al 2 O 3 composite having a surface area of 250-400 m.<SP>2</SP>/g. at least 40% of the catalyst pores being of radius greater than 45 Š. The catalyst may also contain 5-15 parts by wt. of magnesia, thoria, zirconia, beryllia or a rare earth metal oxide. The SiO 2 : Al 2 O 3 weight ratio may be from 70 : 30 to 90: 10. The feed may be a polyalkylbenzene or polyalkylnaphthalene, in particular a C 8 aromatic hydrocarbon mixture of reduced p-xylene content. |
