ExxonMobil

About: ExxonMobil is a company organization based out in Irving, Texas, United States. It is known for research contribution in the topics: Catalysis & Polymerization. The organization has 16969 authors who have published 23758 publications receiving 535713 citations. The organization is also known as: Exxon Mobil Corporation & Exxon Mobil Corp..

Oil Recovery by Alkaline Waterflooding

Abstract: Flooding of oil containing organic acids with alkaline water under favorable conditions can result in recovery of around 50% of the residual oil left in a watered-out model. A high recovery efficiency results from the formation of a bank of viscous water-in-oil emulsion as surface active agents (soaps) are created by reactions of base in the water with the organic acids in the oil. The type and amount of organic acids in the oil, the pH and salt content of the water, and the amount of fines in the porous medium are the primary factors which determine the amount of additional oil recovered by this method. Interaction of alkaline water with reservoir rock largely determines the amount of chemical needed to flood a reservoir. Laboratory investigations using synthetic oils and crude oils show the importance of oil-water and liquid-solid interfacial properties to the results of an alkaline waterflood. A small field test demonstrated that emulsion banks can be formed in the reservoir and that chemical costs can be reasonable in selected reservoirs. Although studies have provided many qualitative guide lines for evaluating the feasibility of alkaline waterflooding, the economic attractiveness of the process must be considered on an individual reservoir.

Structural, electronic, and chemisorption properties of small aluminum clusters.

Abstract: The results of total-energy calculations for optimized structures of ${\mathrm{Al}}_{n} (n=2\ensuremath{-}6)$ and ${\mathrm{Al}}_{n}{\mathrm{H}}_{2}$ are presented in which properties are found to be at variance with the predictions of the electronic shell model. These differences are understood by the introduction of atomic potentials as a perturbation on the shell model. Ionization energies (5.8-6.6 eV) and electron affinities (0.1-2.1 eV) are mostly larger than for an Al atom. Bond lengths increase from 2.51 to 2.81 \AA{}. ${\mathrm{Al}}_{6}$ is found to be the smallest cluster that will adsorb ${\mathrm{H}}_{2}$.

Thermoplastic adhesive compositions

Abstract: Thermoplastic adhesive compositions such as hot melts containing conventional components are improved considerably by the inclusion of acid or acid derivative grafted polyolefins particularly acrylic acid-grafted polypropylene, polyethylene and/or ethylene-propylene polymer substances. Alternatively, novel adhesive compositions are prepared in which the polyolefin constituent is entirely a grafted polyolefin.

High temperature polymerization process using ionic catalysts to produce polyolefins

Abstract: This invention relates to a process for polymerizing olefins at high pressures in a polymerization medium at high temperature utilizing an ionic olefin polymerization catalyst derived from the reaction of a cyclopentadienyl-containing transition metal compound having a hydrolyzable alkyl or hydride ligand with an ion exchange activator. The ionic catalyst system has been found to be highly active at temperatures of 160 °C or greater, to provide a process capable of producing polymer products of desired chemical and physical properties at high production rates.

Elastic articles having improved unload power and a process for their production

Abstract: Disclosed is a process for improving the unload power of a precursor elastic film comprising orienting the film to a draw ratio in the range of about 2:1 to about 20:1 followed by annealing. Further disclosed is an elastic film oriented to a draw ratio in the range of about 2:1 to about 20:1 and comprising a copolymer of ethylene polymerized with at least one comonomer selected from the group consisting of C3 to C20 alpha-olefins and C3 to C20 polyenes, wherein the copolymer has a density in the range of about 0.855 g/cm3 to about 0.9 g/cm3, a melt index in the range of about 0.5 to about 50, with a composition distribution index at least about 45 percent.