Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.

De-aluminization of aluminosilicates

Abstract: A process for the de-aluminization of aluminosilicates such as zeolites, clays, gels, amorphous silica-aluminas and crystalline silica-aluminas. The process comprises contacting an aluminosilicate with an inorganic halide or oxyhalide at a temperature sufficiently high enough to volatilize the aluminum halide or oxyhalide which is formed.

Regioselective methylation of toluene to para-xylene

Abstract: A process and catalyst for Shape Selective Hydrocarbon Conversions such as the regioselective disproportionation of toluene to para-xylene wherein hydrocarbon to be converted is passed over a catalytic molecular sieve which is trim selectivated with a reaction stream comprising toluene and a silicon-containing high efficiency p-xylene selectivating agent under toluene conversion conditions. The toluene disproportionation process attains a single-pass para-xylene product over 95% coupled with a toluene conversion of at least 15%. The present invention also includes the highly para-selective catalyst which results from the treatment of a catalytic molecular sieve with a high efficiency p-xylene selectivating agent under the recited conditions.

Hydroprocessing reactor and process with gas and liquid quench

Abstract: A method and reactor system for catalytic hydrotreating and hydrocracking liquid hydrocarbon feedstock for producing a cracked liquid feedstock having a reduced contaminant level involves introducing the feedstock into the first reaction zone of a reactor system having a plurality of successive reaction zones, each reaction zone having a hydroprocessing catalyst bed therein, at least the first reaction zone comprising a hydrotreating reaction zone and at least one downstream reaction zone comprising a hydrocracking reaction zone, introducing hydrogen gas into the reactor system for flow through and over the catalyst beds in contact with the liquid in the reaction zones, the hydrogen exothermically reacting with the liquid in the reaction zones for producing an effluent for each reaction zone having a temperature greater than the temperature of the influent feedstock to that reaction zone, introducing liquid feedstock having the same composition as the liquid feedstock introduced into the first reaction zone into at least one quench zone downstream of the first reaction zone for admixing with the effluent from the immediately upstream reaction zone, the introduced liquid feedstock having a feed rate and a temperature sufficient to reduce the temperature of the effluent, and injecting quench gas into each quench zone in an amount sufficient, in combination with the effluent from the immediately upstream reaction zone and any introduced liquid feedstock, to reduce the temperature of effluent to within a predetermined range, and recovering the effluent product from the last reaction zone.

Localized bacterial infection in a distributed model for tissue inflammation.

Abstract: Phagocyte motility and chemotaxis are included in a distributed mathematical model for the inflammatory response to bacterial invasion of tissue. Both uniform and non-uniform steady state solutions may occur for the model equations governing bacteria and phagocyte densities in a macroscopic tissue region. The non-uniform states appear to be more dangerous because they allow large bacteria densities concentrated in local foci, and in some cases greater total bacteria and phagocyte populations. Using a linear stability analysis, it is shown that a phagocyte chemotactic response smaller than a critical value can lead to a non-uniform state, while a chemotactic response greater than this critical value stabilizes the uniform state. This result is the opposite of that found for the role of chemotaxis in aggregation of slimemold amoebae because, in the inflammatory response, the chemotactic population serves as an inhibitor rather than an activator. We speculate that these non-uniform steady states could be related to the localized cell aggregation seen in chronic granulomatous inflammation. The formation of non-uniform states is not necessarily a consequence of defective phagocyte chemotaxis, however. Rather, certain values of the kinetic parameters can yield values for the critical chemotactic response which are greater than the normal response. Numerical computations of the transient inflammatory response to bacterial challenge are presented, using parameter values estimated from the experimental literature wherever possible.

Method for transporting viscous crude oils

Abstract: Viscous crude oil is mixed with an oil diluent having a relatively low viscosity and the resulting mixture having a predetermined viscosity and flow rate is pumped in a pipeline to a point of use. The flow rates of the viscous crude oil and the diluent are controlled with the aid of a digital computer in response to signals representative of the viscosity and specific gravity of each component, the desired viscosity of the mixture and the flow rate of the mixture. The viscosity of the mixture is maintained substantially at the design viscosity of the pipeline at the operating temperature of the pipeline and the flow rate of the mixture is substantially equal to the design capacity of the pipeline.