Abstract:
A process for the separation, and removal, of hydrogen, or both hydrogen and carbon monoxide, from a mixture of these gases with olefinic hydrocarbons. In one embodiment, a mixture constituted of hydrogen and one or more reactive unsaturated hydrocarbons is contacted with oxygen or an oxygen-containing gas, over a catalyst at reaction conditions sufficient to oxidize the hydrogen component of the mixture to form water, while suppressing reaction of the reactive unsaturated hydrocarbon. In a second embodiment, there is included a two-reaction-zone series wherein effluent from the first reaction zone, wherein the mixture includes hydrogen, carbon monoxide and at least one reactive unsaturated hydrocarbon, is contacted with oxygen or an oxygen-containing gas, and reacted over an oxidation catalyst at conditions sufficient to oxidize the carbon monoxide component of the mixture to form carbon dioxide and suppress hydrogenation of the reactive unsaturated hydrocarbons. In a third embodiment, there is included a three-reaction-zone series wherein effluent from the second reaction zone, wherein the mixture includes carbon monoxide, water, and at least one reactive unsaturated hydrocarbon, is reacted over a water-gas-shift and hydrogenation catalyst at conditions sufficient to react carbon monoxide component of the mixture to form carbon dioxide and hydrogen, and hydrogenate said reactive unsaturated hydrocarbon with the resulting hydrogen. In each embodiment, reactive unsaturated hydrocarbons denuded of hydrogen, or both hydrogen and carbon monoxide are recovered.
Abstract:
The present invention relates to methods for converting oxygenates to olefins. More particularly, the invention relates to methods for converting oxygenates to olefins with improved olefin yields and decreased yields of undesirable methane and other light saturate byproducts. It is characterised by the use of high weight hourly space velocity (WHSV; above 20 hr ).
Abstract:
The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers, alkyl phosphites, specific ashless dispersants and a corrosion inhibitor. The anti-shudder durability of these fluids may be further enhanced by inclusion of a metallic detergent.
Abstract:
There are disclosed fuel oil compositions having improved low temperature properties which contain an additive being an ester, amide or amine derivative of a polyalkylene glycol diacid or mixtures of this additive with conventional flow improver co-additives.
Abstract:
A cross-linked or at least partially cross-linked thermoplastic elastomeric composition formed of from 10 to 90 percent of a first polymeric material comprised of ethylene, alpha -olefin and optionally a non-conjugated diene, and 90 to 10 percent of a second olefin polymeric material, wherein at least one of the first or second polymeric materials is at least partially the product of a metallocene polymerization reaction.
Abstract:
Solid, e.g., modified fillers and curatives, for polymers, elastomers, rubbers, polyolefins, and blends thereof, comprising a solid having the polymers, rubbers, polyolefins, and elastomers of the blend or polymers, rubbers, polyolefins, and elastomers compatible with the components of the blend coated or adsorbed thereon and methods of preparing the modified solids and blends containing the same.
Abstract:
The invention relates to lubricating oil compositions comprising a major amount of an oil of lubricating viscosity and a minor amount of at least one compound containing a heterometallic tetranuclear core, preferably cubane, more preferably thiocubane, having 1, 2 or 3 molybdenum atoms, the other metal atoms being Co, Cr, Cu, Ni, W, Mn, Zn or Fe, preferably Cu, and bonded thereto ligands capable of rending the compound oil-soluble or oil-dispersible. The formulated lubricating oil has enhanced friction reducing and anti-wear properties.
Abstract:
A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature of about 130 DEG C or greater with a first stream comprising a solvent having a boiling point in the range between about 150 to 350 DEG C and a freezing point of less then 40 DEG C, and, optionally, at least one by-product selected from the group consisting of: maleic anhydride, citraconic anhydride, benzoic acid and phthalic anhydride, in a contacting means such that a substantial portion of the phthalic anhydride contained within the vapor phase oxidation product transfers from the vapor phase to a liquid phase and a substantial portion of the first stream which are more volatile than phthalic anhydride transfer from the liquid phase to the vapor phase and wherein a vapor-to-liquid weight ratio in the range of between about 2 to 20 is exhibited within the contacting means, thereby forming a liquid phase phthalic anhydride product having a phthalic anhydride concentration in the range between about 50-100 wt.%, preferably 90-100 wt.%, without the formation of an intermediate solid phase.
Abstract:
The invention relates to catalytic hydrogenation processes for hydrocarbon molecules of number-average molecular weight greater than about 180, and to use therein of an inert catalyst support comprising porous refractory substrate particles having: a) a pore volume distribution wherein i) pores having diameters > 150,000 ANGSTROM constitute greater than about 2 % of the total volume, ii) pores having diameters > 20,000 ANGSTROM and 2,000 ANGSTROM and
Abstract:
A multigrade lubricating oil composition exhibiting an acceptable low temperature performance as measured by a cold cranking simulator, having an ethylene alpha-olefin dispersant and a viscosity modifier selected from the group consisting of ethylene alpha-olefin copolymers, polyalkylacrylate polymers, hydrogenated diene polymers, hydrogenated diene styrene copolymers and mixtures thereof, wherein the dispersant has an ethylene content in the range of about 10 to 50 weight percent, preferably 30 to 50 weight percent; whereby the low temperature performance of the composition is superior to the low temperature performance of a control oil composition comprises a dispersant with an ethylene content of greater than about 50 weight percent.