Abstract:
The invention provides a method for selectively alkylating a diamondoid compound comprising reacting at least one alpha -olefin containing at least six carbon atoms with at least one diamondoid compound in the presence of an acid catalyst selected from AlX3 and BX3 wherein X is a halogen, in the absence of added proton-donating catalyst promoter. The invention further provides a lubricant composition comprising alkyl-substituted adamantanes wherein the ratio of linear to branched alkyl substituents is at least 4:1 and wherein the average number of alkyl substitutions per diamondoid molecule is from 1.5 to 4.
Abstract translation:本发明提供了一种选择性烷基化金刚石化合物的方法,包括使至少一种含有至少6个碳原子的α-烯烃与至少一种类金刚石化合物在选自Al x 3和BX 3的酸催化剂(其中X为卤素)存在下反应, 没有添加质子递送催化剂促进剂。 本发明还提供了包含烷基取代的金刚烷的润滑剂组合物,其中直链与支链烷基取代基的比例为至少4:1,并且其中每个金刚石类分子的烷基取代的平均数为1.5至4。
Abstract:
This invention provides a method for incorporating a diamondoid compound into a lubricant stock comprising reacting at least one alpha -olefin containing at least six carbon atoms with at least one diamondoid compound in the presence of an acid catalyst selected from the group consisting of AlX3, BX3, and GaX3, wherein X is a halogen, together with at least one added proton-donating catalyst promoter. The invention further provides a lubricant composition comprising alkyl-substituted diamondoids wherein the ratio of linear to branched alkyl substituents is at least 4:1 and wherein the average number of alkyl substitutions per diamondoid molecule is from 1.5 to 4.
Abstract:
A fuel additive having detergency, solubility and thermal stability comprises a detergent component, e.g., polyalkenyl succinimide, and a carrier fluid obtained from a diamondoid fluid comprising an element selected from the group consisting of adamantane, diamantane, triamantane, tetramantane, and the alkyl-substituted derivatives thereof.
Abstract:
A process for producing lower alkyl tertiary alkyl ethers or tertiary alkyl alcohol, such as methyl tertiary butyl ether (MTBE), methyl tertiary amyl ether (TAME) or tertiary butyl alcohol, wherein the 1-alkene component of the hydrocarbon feedstream to an etherification or olefin hydration process is separated by selective oligomerization in contact with a reduced chromium on silica support catalyst producing useful hydrocarbons of higher molecular weight, such as gasoline, distillate and lube range hydrocarbons. It has further been found that separation of the 1-alkene component of the hydrocarbon feedstream can be accomplished in an oligomerization process integrated either upstream or downstream of the etherification step.
Abstract:
Novel lubricant mixtures are disclosed having unexpectedly high viscosity indices. The mixtures are blends of high viscosity index polyalphaolefins prepared with activated chromium on silica catalyst and polyalphaolefins prepared with BF3, aluminum chloride, or Ziegler-type catayst. Superior blends are also prepared from HVI &upbar& XPAO with mineral oil and/or other synthetic liquid lubricants.
Abstract:
A hydrocarbon oligomer and a process for its production is disclosed that is useful as a pour point depressant and as a combination pour point depressant and viscosity index improver for mineral oil or synthetic oil. The oligomer is also useful in modifying wax crystal formation at low temperature when added to distillate fuels. The oligomer is a near linear copolymer of a mixture of ethylene and C3-C28 1-alkenes, or only 1-alkenes, wherein a large proportion of the pendant alkyl groups of the recurring 1-alkene monomer units contain between 14 and 22 carbon atoms. The oligomer is produced by polymerization of mixed 1-alkenes with reduced chromium oxide catalyst on silica support.
Abstract:
The invention provides a fiber optic cable (10) comprising an optical fiber (12) and the grease (14) applied over the optic fiber (12). Surrounding grease (14) is a sheath (16). Additional layers of grease (18 and 22) may optionally be applied in sequence with outer sheaths (20 and 24), if desired. Furthermore, the invention provides a fiber optic cable (10) and a diamondoid-based viscous filling material for a fiber optic cable (10).
Abstract:
Lubricant compositions comprise blends or mixtures of low viscosity, 3-8 cS e.g. about 5 cS (100 DEG C), HVI lube basestock with higher viscosity, 15 cS+ e.g. 30+ cS (100 DEG C) HVI PAO lube basestock produced from slack wax by thermal cracking to alpha olefins followed by Lewis acid catalyzed oligomerization of the alpha olefin mixture to lube basestock. Blending these components in appropriate proportions produces lube basestock having viscosities in the range of 8-15 cS (100 DEG C) from which material suitable for the formulation of 10 W-30 automobile engine lube can be produced. The blends are notable for exhibiting high VI values greater than that of either component of the blend.
Abstract:
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 C12 to C18 paraffinic hydrocarbon of petroleum origin and a C10 to C32 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.
Abstract:
Alpha-olefins such as 1-decene are copolymerized with vinylaromatic monomers, especially styrene or the alkylstyrenes, to produce liquid lubricant oligomers having a broad range of viscosities, high viscosity index(VI), improved thermal stability and additive solubility characteristics. The lubricant oligomers are random copolymers containing recurring units of 1-alkene and vinyl aromatic monomer in mole ratios between 2:1 and 500:1, but preferably between 5:1 and 100:1 and more preferably from about 10:1 to 50:1. The recurring 1-alkene units of the copolymer have a branch ratio of less than 0.19, indicative of a poly 1-alkene segment of the copolymer chain or backbone that is essentially linear. The copolymerization catalyst is a reduced Group VIB metal catalyst on porous support, preferably reduced chromium oxide on a silica support.