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    • 95. 发明授权
    • Regeneration of reduced supported chromium oxide catalyst for
alpha-olefin oligomerization
    • 用于α-烯烃低聚的还原的负载型铬氧化物催化剂的再生
    • US4926004A
    • 1990-05-15
    • US282362
    • 1988-12-09
    • Bruce P. PelrineMargaret M. Wu
    • Bruce P. PelrineMargaret M. Wu
    • B01J23/92B01J38/12C07C2/10
    • B01J38/12B01J23/92C07C2/10C07C2521/08C07C2523/26Y02P20/584
    • A process for producing liquid oligomers useful as lubricants from alpha-olefins feedstock, such as 1-decene. The olefins are oligomerized over a supported and reduced metal oxide catalyst from Group VIB of the Periodic Table to produce the oligomers. The chromium-on-silica oligomerization catalysts can be regenerated to allow repeated recycling of the catalyst with reduced losses in yield of the lubricant. The regeneration process is particularly useful to regenerate catalyst deactivated during the course of oligomerization at high temperatures to produce low viscosity HVI-PAO lubricant. The regeneration process is carried out by (i) purging the deactivated catalyst with inert gas to strip unreacted olefin and lubricant product; (ii) contacting the purged catalyst with a stream of oxidizing gas at an elevated temperature to oxidize the carbonaceous deposits; and (iii) cooling the catalyst and contacting it with a stream of reducing gas to reduce the metal component to a lower valence state.
    • 用于生产由α-烯烃原料如1-癸烯用作润滑剂的液体低聚物的方法。 烯烃在元素周期表VIB的负载和还原的金属氧化物催化剂上低聚,以产生低聚物。 可以再生铬 - 二氧化硅低聚催化剂,以允许反复循环使用催化剂,同时减少润滑剂的产率损失。 再生过程特别有用于在低温反应过程中在高温下再生催化剂失活以产生低粘度HVI-PAO润滑剂。 再生过程是通过(i)用惰性气体净化去活化的催化剂以除去未反应的烯烃和润滑剂产物; (ii)在高温下使被吹扫的催化剂与氧化气体流接触以氧化碳质沉积物; 和(iii)冷却催化剂并将其与还原气体流接触以将金属组分降低至更低的化合价态。