关键词: 催化裂化汽油, 加氢精制, 烯烃, 饱和, 叠合, 环化

Abstract: The chemical reactions of olefins happened during the hydrotreating of FCC naphtha (FCCN) are introduced. Hydrosaturations of olefins are the main reaction, minor side-reactions including polymerization and cyclization of olefins also occur simultaneously. Polymerization among C4, C5 and C6 olefins are easy to happen and form larger molecules, such as C9, C10 and C11 olefins or paraffins. Cyclization of olefins is mainly to generate C6~C10 cyclic hydrocarbons, in particular, the incremental range of C6 cyclic hydrocarbons could reach around 30%. The cyclization reactions of olefins are affected less by reaction temperature, yet greater by hydrogen partial pressure; especially under the high hydrogen partial pressure conditions the effect of pressure is significant.

Key words: catalytic cracking gasoline, hydrotreating, olefin, saturation, oligomerization, cyclization