Showing papers by "Mobil published in 1969"

Crystalline zeolite zsm-5 and method of preparing the same

Abstract: A FAMILY OF CRYSTALLINE ZEOLITES, DESIGNATED ZSM-5, HAVING THE COMPOSITION, EXPRESSED AS MOLE RATIOS OF OXIDES AS FOLLOWS: 0.9$0.2M2/NO:W2O3:5-100YO2:ZH2O WHEREIN M IS AT LEAST ONE CATION, N IS THE VALENCE THEREOF, W IS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND GALLIUM, Y IS SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM, AND Z IS FROM 0-40, AND CHARACTERIZED BY A SPECIFIED X-RAY POWDER DIFFRACTION PATTERN. CATALYTIC CONVERSION CARRIED OUT IN THE PRESENCE OF SUCH ZEOLITES.

Stratigraphy and geologic history of the sabkha, abu dhabi, persian gulf

Abstract: SUMMARY The sabkha of Abu Dhabi was formed during the past 7,000 years by wind erosion of pre-existing dunes and progradation of subaqueous, intertidal, and supratidal carbonate sediments. Marine transgression began in this area about 7,000 years ago and reached an apparent high about 1 m above its present level somewhat prior to 4,000 years B.P. Since then progradation of intertidal and supratidal sediments has taken place; this began 3,750 years ago. Arid conditions over the sabkha have produced large amounts of gypsum and anhydrite and lesser amounts of dolomite, magnesite, celestite and halite.

Single-phase flow through porous media

Abstract: The local volume average of the equation of motion is taken for an incompressible fluid flowing through a porous structure under conditions such that inertial effects may be neglected. The result has two terms beyond a pressure gradient: g, the force per unit volume which a flowing fluid exerts on a porous structure, and the divergence of the local volume-averaged extra stress tensor (viscous portion of the stress tensor). Constitutive equations for g are examined with the aid of the principle of material indifference. When g is assumed to be a function of the velocity of the fluid relative to the solid as well as various scalars, the usual results for a nonoriented (isotropic) porous structure are obtained. When g is assumed to be a function of the local porosity gradient as well, we derive a new expression for g applicable to oriented (anisotropic) porous structures. For a Newtonian fluid with a constant viscosity, the divergence of the local volume-averaged extra stress tensor is proportional to the Laplacian of the averaged velocity vector. Boundary conditions for the averaged velocity vector are discussed. Three problems are solved for the flow of an incompressible Newtonian fluid in a nonoriented permeable medium. These solutions, as well as an order-of-magnitude analysis, suggest that we may often neglect both the Laplacian of average velocity and the boundary conditions for the tangential components of averaged velocity at an impermeable wall. Two specific constitutive equations for g are proposed for the flow of incompressible Noll simple fluids in nonoriented porous structures. Flow through a porous medium bounded by an impermeable cylindrical surface is solved for these two constitutive equations, and the results are compared with previously available experimental data.

Liquid hydrocarbon fuels containing high molecular weight mannich bases

Abstract: Reaction products obtained from high molecular weight alkylsubstituted hydroxyaromatic compounds, amines and aldehydes are detergency improvers for liquid hydrocarbon fuels.

Method of recovering hydrocarbons from oil shale

Abstract: A method is described for recovering hydrocarbons from an oil-shale formation by in situ retorting A well penetrating the formation is heated and gas is injected until a pressure buildup within the well is reached, due to a decrease in the conductivity of naturally occurring fissures within the formation The well is then vented, in order to produce spalling of the walls This results in the formation of an enlarged cavity containing rubberized oil shale A hot gas then is passed through the rubberized oil shale in order to retort hydrocarbons and these hydrocarbons are recovered from the well (11 claims)

Dewaxing of oils by shape selective cracking and hydrocracking over zeolites zsm-5 and zsm-8

Abstract: STRAIGHT-CHAIN HYDROCARBONS AND SLIGHTLY BRANCHEDCHAIN HYDROCARBONS ARE SELECTIVELY CONVERTED UTILIZING NOVEL CRYSTALLINE ZEOLITES HAVING UNIQUE MOLECULAR SIEVING PROPERTIES. THE CATALYST PREFERABLY CONTAINS ACIDIC CATIONS AND CAN ALSO CONTAINS A COMPONENT HAVING A HYDROGENATION/DEHYDROGENATION FUNCTION. THE PROCESS OF THIS INVENTION IS PARTICULARLY USEFUL FOR THE DEWAXING OF HYDROCARBON OILS INCLUDING REMOVAL OF HIGH FREEZING POINT PARAFFINS FROM JET FUEL TO LOWER FREEZING, AS WELL AS IMPROVING THE OCTANE RATING OF NAPHTHA FRACTIONS..

Engine oil analysis system

Abstract: 1300120 Infrared absorption analysis MOBIL OIL CORP 24 March 1970 [24 March 1969] 14130/70 Heading G1A A sample of oil from a sequence of samples is tested for its viscosity, metal content, and infrared absorption and the results are compared in a computer with evaluation criteria which may comprise limit and trend values to provide information in respect of the engine from which the sample has been taken and to provide a print out of results and probable remedial action. The samples are fed on a table and applied to the test equipment by suction and dipping and the infrared spectrometer which may make a number of absorbance tests at different wavelengths for glycol, water content, oxidation, and nitration includes a number of reference samples which may be brought mechanically and possibly by programme into the system as required. The measuring cell is shaped to provide a thin rectangular sample and its inner walls are grooved as at 44, 45, Fig.6 in order to facilitate more rapid filling and emptying and more efficient purging. The test results are introduced to the computer in digital form and the incoming signals are tested for validity before comparison. A record of the measurements may be made and in connection with infrared testing the speed of the recording medium may be varied in dependence on zones of interest. The arrangement may be controlled by a timer which itself may be programmed and the reports may be stored before print out to economize on printer time. A local computer dealing with simple comparisons may be used in conjunction with a further computer which may be connected by line. Metal content may be measured by atomic absorption, X-ray fluorescence, or neutron actuation.

Conversion of polar compounds using highly siliceous zeolite-type catalysts

Abstract: A method of converting an organic polar compound comprising contacting the same in a conversion zone under conversion conditions with a crystalline aluminosilicate catalyst the silica/alumina ratio of which is more than 10/1.

A study of the orientation of adsorbed water molecules on montmorillonite clays by pulsed NMR

Abstract: The study of clay water systems by pulsed nuclear magnetic resonance reveals that natural as well as synthetic clays have associated with them a certain amount of oriented water. Direct experimental evidence of oriented water between natural clay platelets is observed for montmorillonite at room temperature. Doublet splittings in the NMR spectra indicate that the water molecules are preferentially oriented by the clay platelets. The occurrence of the doublet splitting was found to be affected by both particle size and temperature. Experimental evidence indicates that the transverse relaxation process above room temperature is not grossly affected by paramagnetic centers arising from the natural iron content of the clay lattice. Although it is more difficult to observe the doublet splitting in samples with a high iron content, these paramagnetic centers do not preclude its occurrence.

Subsea production system

Abstract: A subsea production method and apparatus separates substantially waterfree gas from oil in a subsea satellite located adjacent a plurality of subaqueous wells. Production fluid from the subaqueous well enters the satellite through production fluid lines, passes through a heat exchanger, and enters into a liquid knockout section. Separated gas and oil then enter into a lowtemperature separator to complete the separation of the substantially waterfree gas from the oil. A hydrate depressant is injected into the substantially waterfree gas before entry into the low-temperature separator through a variable choke so as to depress the formation of hydrates from any water remaining in the substantially waterfree gas.

Permeable thermoplastic film product and method

Abstract: THE PRESENT INVENTION RELATES TO A THERMOPLASTIC FILM PRODUCT AND A METHOD EMPLOYED TO INCREASE THE PERMEABILITY OF THERMOPLASTIC FILMS BY PRESSING SUCH FILMS, UTILIZING A RESILIENT SURFACE PRESSURE ROLLER, INTO CONTACT WITH A DISCONTINUOUS SURFACE OF A COATED ABRASIVE MATERIAL WHEREBY HIGHLY PERMEABLE FILMS ARE PRODUCED WHICH PERMIT CONTROLLED PASSAGE OF GASES OR VAPORS SUCH AS MOISTURE VAPOR THERETHROUGH.

Multifunctional lubricant additive compositions and lubricating oils containing

Abstract: Balanced oil additive compositions can be used in the engine, gears and elsewhere of mobile equipment. Appropriate concentrations of basic detergents, dispersants, antioxidants, extreme pressure agents and friction modifiers are balanced.

Simulation of a partial pressure maintenance gas cycling project with a compositional model, Carson Creek Field, Alberta

Abstract: A study of gas cycling the Carson Creek gas condensate reservoirs while reservoir pressure is declining due to gas sales is discussed. Laboratory experiments were performed to study revaporization of condensed Carson Creek liquid with lean gas. A 2-dimensional, 3-phase, 12-component finite difference model was used to simulate 6 yr of cycling history and to predict future performance. The model was developed to give accurate results at rapid computing speeds while simulating phase equilibrium and unsteady-state flow. Three cases of reservoir depletion were studied: (1) continued cycling with low-rate gas sales; (2) cycling with normal-rate gas sales; and (3) depletion without further cycling. Results from the laboratory experiments indicated that substantial amounts of Carson Creek retrograde liquid would be revaporized by lean injected gas. The results from the model study showed that after 6 yr of cycling, partial cycling with normal-rate gas sales was the most economical of the schemes studied. (12 refs.)

Isotopic Ages of Igneous and Metamorphic Boulders from the Haymond Formation (Pennsylvanian), Marathon Basin, Texas, and their Significance

Abstract: Twelve whole-rock and mica ages have been determined on igneous and metamorphic boulders from the Haymond Formation in the Marathon Basin. Ages range from 370 to 410 m.y., indicating that these rocks were formed during the period from Middle Devonian to Late Silurian. The granitic gneisses and metarhyolitic rocks have distinctive petrographic and chemical characteristics which suggest that the rocks were derived from the partial melting of clastic sediments. This is supported by the relatively high initial Sr 87/86 ratio of 0.713. The petrographic and isotopic evidence supports the following conclusions: (1) a geosyncline to the southeast of the Marathon depositional basin probably reached maximum subsidence in Silurian-Devonian time. (2) the partial melting in the downwarped geosyncline and resulting volcanism offers a source for the silica in the Caballos Novaculite, (3) the igneous and metamorphic activity in the geosyncline was followed closely by mountain building which supplied the source for the flysch sequence in the Marathon depositional basin. The mountains formed during this interval are named the Llanoria Mountains, and the orogeny causing the uplift is called the Llanorian Orogeny. Ten samples were dated from Texas and Mexico in an unsuccessful search for the specific source area for the boulders.

Crystalline zeolite zsm-10

Abstract: A FAMILY OF ZEOLITES, KNOWN AS ZSM-10, HAVING THE XRAY DIFFRACTION INTERPLANAR SPACINGS OF TABLE 1 OF THE SPECIFICATION; THE PREPARATION OF SAME FROM A REATION MIXTURE CONTAINING SILICA, ALUMINA, POTASSIUM OXIDE, AN OXIDE OF 1,4-DIMETHYL-1,4-DIAZONIABICYCLO(2,2,2)OCTANE, AND WATER; AND ORGANIC COMPOUND CONVERSION WITH A CATALYTICALLY-ACTIVE FORM OF SAID ZEOLITE.

Selective separation by a chromatographic process

Abstract: A class of novel crystalline aluminosilicates generally identified as ZSM-5 type and having unique molecular sieving properties are utilized as selective sorbents in a chromatographic process The effective portals in these zeolites are apparently elliptically shaped with effective major and minor axis of about 70 + OR - 07A and 50 + OR - 05A, respectively This unique shape is utilized to provide ''''keyhole'''' molecular sieving action which is particularly useful for separating specific members of closely-related chemical compounds A preferred embodiment is the selective separation of disubstituted hydrocarbons such as dialkyl aromatics The process of this invention is particularly useful for separating C8 aromatic mixtures A particularly preferred embodiment is the separation of p-xylene from a mixture of the same with o-xylene and/or m-xylene and/or ethylbenzene

Zeolite-containing catalyst, synthesis and use thereof

Abstract: A method of preparing a composition comprising a crystalline zeolite and a porous matrix material which comprises coating at least a portion of the surface of at least one of the components selected from the group consisting of said zeolite and said porous matrix material with a solid or liquid coating material which is substantially retained during any subsequent processing steps prior to its positive intentional removal, which occurs after the compositing step, intimately compositing said zeolite with said matrix material and removing said coating material; the composition prepared therefrom and hydrocarbon conversion employing the composition as a catalyst.

Three-dimensional presentation of borehole logging data

Abstract: The specification discloses a technique and system for recording, on a two-dimensional recording medium, data obtained from cyclic scanning operations carried out angularly around the wall of the borehole at each of a plurality of different depths wherein subsurface parameters are sensed during each scanning operation. In one embodiment, a plurality of loop-shaped trace patterns, preferably in elliptical form, are recorded in the form of a helix to form a representation of the borehole wall. Different sides of the helix may be intensified or half sections of the helix recorded to illustrate different sections of the borehole wall.

Isoparaffin-olefin alkylation with crystalline zeolite catalysts at low isoparaffin to olefin ratios

Abstract: A CONTINUOUS PROCESS FOR ALKYLATION OF A BRANCHED CHAIN HYDROCARBON WITH AN OLEFIN IN THE PRESENCE OF A CRYSTALLINE ALUMINOSILICATE ZEOLITE CATALYST EMPLOYING A REACTION MIXTURE IN WHICH THE MOLAR RATIO OF ISOPARAFFIN TO OLEFIN IS EXTREMELY LOW COMPARED TO CONVENTIONAL ALKYLATION, I.E. GENERALLY BELOW 3 TO 1 FOLLOWED BY REGENERATION AND REUSE OF THE CATALYST SO EMPLOYED.

Synthetic crystalline aluminosilicate

Abstract: A novel synthetic crystalline aluminosilicate zeolite having a rigid three dimensional structure characterized by having benzyltrimethylammonium ions in the structure; method for preparing the crystalline aluminosilicate from a mixture of sodium oxide, potassium oxide, silica, alumina, water and benzyltrimethylammonium compound and organic compound conversion with a catalytically-active form of the new zeolite.

Heat shrinkable films of polypropylene and an ethylene/butene copolymer

Abstract: BIAXIALLY ORIENTED THERMOPLASTIC FILMS, PARTICULARLY SUITABLE FOR EMPLOYMENT AS SHRINK FILMS, COMPRISING ORIENTED THERMOPLASTIC FILMS WHICH HAVE BEEN FORMED FROM A BLEND OF FROM ABOUT 10% TO ABOUT 90% BY WEIGHT OF A HIGH ISOTACTIC CONTENT POLYPROPYLENE BLENDED WITH FROM ABOUT 10 TO 90% BY WEIGHT OF AN ETHYLENE-BUTENE-1 COPOLYMER RESIN CONTAINING A MINOR AMOUNT OF ETHYLENE.