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    • 28. 发明授权
    • Well fluids based on low viscosity synthetic hydrocarbons
    • 基于低粘度合成烃的井液
    • US5691281A
    • 1997-11-25
    • US321006
    • 1994-10-06
    • Henry AshjianSuzzy C. HoMargaret M. Wu
    • Henry AshjianSuzzy C. HoMargaret M. Wu
    • C07C5/25C09K8/34C09K7/02C09K7/06
    • C09K8/34C07C5/2518C07C2529/06
    • Solid, waxy 1-olefins may be converted to low viscosity liquid products by carrying out a double bond isomerization in the presence of a solid acidic catalyst such as an acidic clay or a zeolite under mild conditions. The olefin isomer products are useful in the formulation of well fluids such as drilling muds, especially useful in offshore drilling. The preferred oils for making up the well fluids are formulated with a hydrocarbon oil blend of the low viscosity olefin isomer together with a C.sub.12 to C.sub.18 paraffinic hydrocarbon of petroleum origin and a C.sub.10 to C.sub.32 olefin such as tetradecene-1. The fluids exhibit good biodegradability and are non-toxic to marine organisms; they also meet viscosity and pour points specifications for formulation into oil based muds.
    • 固体蜡状1-烯烃可以在温和条件下在固体酸性催化剂如酸性粘土或沸石的存在下进行双键异构化而转化为低粘度液体产物。 烯烃异构体产物可用于诸如钻井泥浆的井液制备,特别适用于海上钻井。 用于制备井液的优选油用低粘度烯烃异构体的烃油共混物与石油来源的C 12至C 18链烷烃和诸如十四碳烯-1的C 10至C 32烯烃一起配制。 液体表现出良好的生物降解性,对海洋生物无毒; 它们也符合粘度和倾点规格,用于配制成油基泥浆。
    • 30. 发明授权
    • Regeneration of reduced metal oxide oligomerization catalyst
    • 还原金属氧化物低聚催化剂的再生
    • US4996384A
    • 1991-02-26
    • US481279
    • 1990-02-20
    • Bruce P. PelrineMargaret M. Wu
    • Bruce P. PelrineMargaret M. Wu
    • B01J23/92B01J38/12C07C2/10
    • B01J23/92B01J38/12C07C2/10C07C2521/08C07C2523/26Y02P20/584
    • A process for producing oligomers from alpha-olefins, such as 1-decene, in which the olefins are oligomerized over a supported, reduced metal oxide catalyst from Group VIB of the Periodic Table to give oligomers with a branch ratio of less than 0.19. The catalyst, preferably a chromium/silica catalyst the catalyst can be regenerated to allow repeated recycling of the catalyst without a loss in yield of the oligomer product. The regeneration process comprises: (i) purging or stripping the deactivated catalyst with inert gas at elevated temperature to strip unreacted olefin and oligomer product from the catalyst; (ii) contacting the deactivated and purged catalyst with a stream of oxidizing gas while heating to elevated temperature to oxidize the metal component of the catalyst and remove carbonaceous deposits from the catalyst; (iii) cooling the oxidized catalyst and contacting it with a stream of reducing gas to reduce the metal component of the oxidized catalyst to a lower valence state. The oligomerization may be carried out at relatively high temperatures of about 90.degree. to 250.degree. C. to produce liquid lubricant products of high viscosity index, typically above 130, or at lower temperatures from about -20.degree. to about +90.degree. C. to product products of higher molecular weight which may be used as lubricant additives, e.g. VI improvers. The high molecular weight products are generally characterized by a branch ratio less than 0.19, a weight average molecular weight from about 15,000 to 200,000, a number average molecular weight from about 5,000 to about 50,000 and a molecular weight distribution from about 1 to about 5. They are also shear stable under high temperature, high shear rate conditions of 150.degree. C. and a shear rate of 10.sup.6 second.sup.-1.
    • 从α-烯烃如1-癸烯制备低聚物的方法,其中烯烃在负载型还原的金属氧化物催化剂上从元素周期表VIB中低聚,得到分支比小于0.19的低聚物。 催化剂,优选铬/二氧化硅催化剂,催化剂可以被再生以允许催化剂的反复循环而不会使低聚物产物的产率降低。 再生方法包括:(i)在升高的温度下用惰性气体吹扫或汽提失活的催化剂,以从催化剂中除去未反应的烯烃和低聚物产物; (ii)在加热至高温以使氧化催化剂的金属组分并从催化剂中除去含碳沉积物的同时使失活和净化的催化剂与氧化气体流接触; (iii)冷却氧化的催化剂并将其与还原气体流接触,以将氧化催化剂的金属组分降至更低的化合价态。 低聚反应可以在约90℃至250℃的相对高的温度下进行,以产生高粘度指数(通常在130以上)或在约-20℃至约+90℃的较低温度至 可用作润滑剂添加剂的较高分子量的产品,例如 VI改进剂 高分子量产物通常的特征在于分支比小于0.19,重均分子量为约15,000至200,000,数均分子量为约5,000至约50,000,分子量分布为约1至约5。 它们在150℃的高温,高剪切速率条件和106秒-1的剪切速率下也剪切稳定。