Abstract: A method is provided for forming at least one curved polymeric microneedle, wherein the microneedle includes a base portion and an elongated body portion terminating in a sharp tip, said elongated body portion comprising a lower portion that is 15% to 25% of the height of the microneedle, said elongated body portion being connected to said base layer. The method comprises: heating an array comprising said base layer and at least a segment of said elongated body portion; passing the heated array against a fixed member to bend the microneedles; and allowing the bent, heated array to be cooled. The heat applied to the base layer and elongated body portion is sufficient to cause the heated microneedle to be at or above the glass transition temperature of the polymer of the microneedle, but below a temperature that would cause the lower portion to bend during the passing step.

Abstract: A lube-oil range hydrocarbon mixture is produced by the oligomerization of a branched olefin mixture which contains olefins of 6 to 16 carbon atoms and has a degree of branching of about 10 to 50 mole percent of branched olefins; the lube-oil range hydrocarbon is obtained by separating and hydrogenating the oligomerized olefins.

Abstract: Internal olefins such as those obtained from a disproportionation of 1-olefins like 1-decene are dimerized over a promoted boron trifluoride catalyst to yield oils useful as lubricant basestock.

Abstract: Internal olefins such as those obtained from a disproportionation of 1-olefins like 1-decene are dimerized over a promoted boron trifluoride catalyst to yield oils useful as lubricant basestock.

Abstract: A mixed olefin feedstock obtained from disproportionating C.sub.8 -C.sub.10 1-olefins can be used as such, i.e. without removal of 1-olefins in a boron trifluoride catalyzed dimerization step to produce synthetic lubricating oils. The results achieved are as good as those achieved using a feedstock from which the undisproportionated 1-olefins have been removed so that this feedstock contains only internal olefins for the dimerization.

Abstract: Improved additives for motor fuels and lubricants are provided comprising low molecular weight hydrogenated liquid polymers containing low levels of combined nitrogen. More specifically, hydrogenated adducts formed from normally liquid low molecular weight polydiolefins and acrylonitrile are excellent additives for motor fuels and lubricants. Motor fuels and lubricating oil compositions containing said additives are also provided.

Abstract: A heavy gasoline fraction having a relatively low research octane number as for instance a fraction obtained from a cat cracker gasoline is passed over a chlorided alumina catalyst modified by the addition of 0.01 to 5 weight percent lead calculated as PbO. The presence of lead decreases the cracking activity of the catalyst so that it can be operated at a higher temperature which favors increased formation of aromatic hydrocarbons.

Abstract: Organically polluted waters are purified by contacting such waters with a water soluble copper salt catalyst in the liquid phase under oxidizing conditions. In one embodiment, an aqueous stream obtained from the effluent of an oxidative dehydrogenation process containing contaminating oxygen-containing organic materials is subjected to liquid phase oxidizing conditions in the presence of cupric nitrate under conditions providing sufficient cupric ion concentration to convert the water to a potable aqueous product.