Abstract: A composition of polyalkylenepolyamine derivatives useful as a corrosion inhibitor in aqueous media produced by reacting a starting polyalkylenepolyamine composition comprising a mixture of:(i) at least one C-alkyl-ethylene diamine; and(ii) at least one di-(C-alkyl)-diethylenetriamine;wherein each C-alkyl group on the ethylene diamine and diethylenetriamine independently contain between 8-26 carbon atoms;with a derivatizing agent which is either an alkylating agent or an alkylene oxide. Methods for preparing this composition and using it to inhibit the corrosion of corrodible metal alloys are also disclosed.

Abstract: A process for depth migration of seismic wave information that has been derived from geological media that causes rapid lateral velocity variations in seismic waves. The process includes the step of decomposing wavefields recorded at the earth's surface using Gaussian beams as basic functions. Then, according to the process, the set of Gaussian beams is extrapolated downward into the earth to obtain the subsurface wavefield. Finally, the wavefield is processed to provide depth-migrated images of subsurface reflectors.

Abstract: The present invention relates to a process for preparing crystalline molecular sieves, particularly large pore zeolites, which comprises contacting active sources of one or more oxides selected from the group consisting of monovalent element oxides, divalent element oxides, trivalent element oxides, tetravalent element oxides, and pentavalent element oxides with an organocation templating agent derived from a 9-azabicyclo[3.3.1]nonane.

Abstract: The method for the enhanced recovery of hydrocarbons from a hydrocarbon bearing reservoir during gas injunction into the reservoir comprises the at least periodic injection of steam and a foam-forming mixture into the reservoir from a known depth interval in a well source to provide a foam in the presence of residual oil and high gas permeable channels of the reservoir. The mixture comprises water, an effective foam forming amount of an alkyl aromatic sulfate component having an average molecular weight from about 400 to about 600 and at least one alkyl group comprising 18 to 24 carbon atoms and a viscosity control agent. The viscosity control agent comprises a surfactant which is present in an amount effective to prevent gelling of the mixture during storage. The reservoir fluids are contacted with the resulting foam so as to assist movement of the hydrocarbons toward a producing interval and the hydrocarbons are recovered from the producing interval.

Abstract: The present invention relates to a process for preparing crystalline molecular sieves, particularly large pore zeolites, which comprises contacting active sources of one or more oxides selected from the group consisting of monovalent element oxides, divalent element oxides, trivalent element oxides, tetravalent element oxides, and pentavalent element oxides with an organocation templating agent derived from sparteine.

Abstract: Compositions are provided comprising a propylene-ethylene copolymer containing about 1 to about 7 weight percent ethylene and an ethylene-alkyl acrylate copolymer containing at least about 20 weight percent ethylene, wherein the composition contains about 10 to about 25 weight percent alkyl acrylate, based on the combined weight of propylene-ethylene copolymer and ethylene-alkyl acrylate copolymer. Films made from these compositions have good RF sealing properties, as well as good flexibility at low temperatures.

Abstract: The present invention relates to a process for preparing crystalline molecular sieves, particularly large pore zeolites, which comprises contacting active sources of one or more oxides selected from the group consisting of monovalent element oxides, divalent element oxides, trivalent element oxides, tetravalent element oxides, and pentavalent element oxides with an organocation templating agent derived from a 3,7-diazabicyclo[3.3.1]nonane.

Abstract: A process for removing oily residues from aqueous waste streams using a cross flow filtration system in which the efficiency of a dynamic membrane system comprising a gel layer and supporting semipermeable membrane is optimized by applying a controlled shear force parallel to the plane of the membrane.

Abstract: Apparatus for withdrawing particulate spent catalyst particles from a packed, non-fluidized bed of such particles in contact with a liquid medium within a vessel wherein the apparatus is a withdrawal conduit or pipe which has an inlet that opens within the bottom of the bed and faces generally downwardly so that a first section extends upwardly from the inlet, and a second section extends downwardly, and the spent catalyst particles exits the packed bed through a uniform and continuous flow path opening into a solids recovery vessel whose pressure is controlled to regulate flow of such spent catalyst from the reaction vessel independent of the rate of flow through the withdrawal conduit.

Abstract: The present invention relates to a process for preparing crystalline molecular sieves, particularly large pore zeolites, which comprises contacting active sources of one or more oxides selected from the group consisting of monovalent element oxides, divalent element oxides, trivalent element oxides, tetravalent element oxides, and pentavalent element oxides with an organocation templating agent derived from 1,3,3,8,8-pentamethyl-3-azoniabicyclo[3.2.1]octane.

Abstract: A process for purifying alkyl sulfides by absorption of the organosulfur impurities on an absorbent. The absorber is a copper salt deposited on a high surface area support. The purified alkyl sulfide is useful as an extractant for palladium.

Abstract: A liner pipe comprising sections of polyethylene pipe connected by articulated gasketed joints of bell and spigot design which are specifically adapted for ease of compression lining of large diameter pipe with minimum disruption to surface traffic and pipeline flow.

Abstract: Method and apparatus for determining heterogeneous properties of a core sample by use of pressure transients. In the method, a pressure is applied to a first closed vessel at one end of a core sample. The pressure is then allowed to dissipate into the core and into a second closed vessel at the other end of the core sample. The pressure in at least one of the vessels or the core itself is measured and recorded as a function of time during the pressure dissipation. The volume of the first vessel is then varied and pressure is once again applied to the first vessel and allowed to dissipate into the core and second vessel. The pressure is again measured and recorded as a function of time during the pressure dissipation. The two sets of recorded measurements are then analyzed to detect deviations from theoretical responses in homogeneous cores which identify heterogeneities.

Abstract: A process is disclosed for passivating the reactivity of contaminant metals, such as nickel and vanadium, which have been deposited on a catalytic cracking catalyst, by adding to the cracking catalyst a mixture of a calcium-containing material and a magnesium-containing material in a separate reactor in the presence of steam. The preferred calcium-containing material is dolomite and the preferred magnesium-containing material is sepiolite. It is also preferred to include antimony and/or bismuth compounds in the additive mixture.

Abstract: A process for removing residual sulfur from a hydrotreated naphtha feedstock is disclosed. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less sulfur sensitive reforming catalyst, thereby converting trace sulfur compounds to H.sub.2 S, and forming a first effluent. The first effluent is contacted with a solid sulfur sorbent, removing the H.sub.2 S and forming a second effluent. The second effluent is contacted with a highly selective reforming catalyst under severe reforming conditions.

Abstract: A process for recovering a trialkyl phosphate ester from a phosphate ester-based functional fluid by treating the fluid with an alkoxide salt, and thereafter, distilling the fluid to recover the trialkyl phosphate ester essentially free of aryl-containing phosphate esters and epoxide-containing hydrolysis inhibitors initially present in the fluid.

Abstract: A crystalline zeolite SSZ-37 is prepared using a N,N-dimethyl-4-azoniatricyclo [5.2.2.0.sup.(2,6) ] undec-8-ene cation as a template wherein said zeolite is used in hydrocarbon conversion processes.

Abstract: A crystalline zeolite SSZ-32 of novel composition is prepared using an N-lower alkyl-N'-isopropyl-imidazolium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-32.

Abstract: In-depth formation damage is prevented during water injection by adding to the water non-compressible solids of sufficient size and concentration to form an external filter cake within the injection well. Preferably, the non-compressible solids are either diatomite, perlite, saw dust, or calcium carbonate, and the concentration of non-compressible solids is from 0.001 to 5 wt%. When no longer needed, the external filter cake is removed from the injection well by using an acid wash or back-flowing the well.

Abstract: Disclosed is a pipe joint assembly comprising: a first and second pipe having smooth, essentially cylindrical ends; an elastomeric tape which is essentially triangular in cross-section, said tape having two surfaces, one of which is flat and the other of which tapers downward from its center to the edges of the tape; said elastomeric tape being wrapped around said first pipe adjacent one end of said first pipe with said flat surface of said tape being in contact with the outer surface of said first pipe; said first pipe having an outside diameter such that said first pipe fits matingly into one end of said second pipe with the elastomeric tape in contact with both the outer surface of said first pipe and the inner surface of said second pipe.