El Paso

An Introduction to General Characteristics ofThermisters, Product Brochure, Dale Electronics Inc., El Paso, Tex., 1985. 

Montedison and Mitsui Petrochemical iatroduced MgCl2-supported high yield catalysts ia 1975 (7). These third-generation catalyst systems reduced the level of corrosive catalyst residues to the extent that neutralization or removal from the polymer was not required. Stereospecificity, however, was iasufficient to eliminate the requirement for removal of the atactic polymer fraction. These catalysts are used ia the Montedison high yield slurry process (Fig. 9), which demonstrates the process simplification achieved when the sections for polymer de-ashing and separation and purification of the hydrocarbon diluent and alcohol are eliminated (121). These catalysts have also been used ia retrofitted RexaH (El Paso) Hquid monomer processes, eliminating the de-ashing sections of the plant (Fig. 10) (129). 

Most commercial processes produce polypropylene by a Hquid-phase slurry process. Hexane or heptane are the most commonly used diluents. However, there are a few examples in which Hquid propylene is used as the diluent. The leading companies involved in propylene processes are Amoco Chemicals (Standard OH, Indiana), El Paso (formerly Dart Industries), Exxon Chemical, Hercules, Hoechst, ICl, Mitsubishi Chemical Industries, Mitsubishi Petrochemical, Mitsui Petrochemical, Mitsui Toatsu, Montedison, Phillips Petroleum, SheU, Solvay, and Sumimoto Chemical. Eastman Kodak has developed and commercialized a Hquid-phase solution process. BASE has developed and commercialized a gas-phase process, and Amoco has developed a vapor-phase polymerization process that has been in commercial operation since early 1980. 

Zambia Kennecott Corp., Salt Lake City, Utah Phelps Dodge Refining Corp., El Paso, Tex. Zambia ConsoHdated Copper Mines Ltd., Kalulushi... 

Year El Paso, Texas Albuquerque, New Mexico Los Angeles, California Newark, New lersey Boston, Massachusetts Philadelphia, Peimsylvania... 

The raw material at this plant is natural gas supplied by the El Paso Natural Gas Company from a nearby pumping station. In each process train, gas is compressed to 850 psig, dehydrated by an adsorption method to remove 100% of the water, then passed through a refrigeration unit to lower the temperature to -60°F. A separator removes liquids upstream of the turboexpander. 

The liquid collected at the bottom of the demethanizer tower is a mixture of ethane, propane, butane, and condensate (EPBC), which is taken off in a stream and pumped—as a liquid, at 1,000 psig—to a customer facility. Another part of the EPBC is introduced into a deethanizer tower. The stream of EPBC liquid entering the deethanizer tower is further separated into PBC liquid and pumped to the El Paso Natural Gas facility in Gallup, New Mexico. EP (ethane and propane)... 

A methane gas stream taken off the demethanizer process, and still at 350 psig, is compressed via byproduct energy from the turboexpanders and raised to 410 psig. The gas is then introduced into a 15,000 hp compressor and raised to 850 psig for delivery back to the El Paso Natural Gas Company. The 60 psig boost by each turboexpander represents a 15% reduction in required horsepower. This amounts to considerable energy saved and is yet another reason why the turboexpander is useful in a cryogenic process of this type. 

Based on notes provided by Jack Hailer and consultation by Guy Z. Moore while employed at El Paso Products Co. 

Consequently, two semicommercial pilot plants have been operated for 1.5 years. One plant, designed and erected by Lurgi and South African Coal, Oil, and Gas Corp. (SASOL), Sasolburg, South Africa, was operated as a sidestream plant to a commercial Fischer-Tropsch synthesis plant. Synthesis gas is produced in a commercial coal pressure gasification plant which includes Rectisol gas purification and shift conversion so the overall process scheme for producing SNG from coal could be demonstrated successfully. The other plant, a joint effort of Lurgi and El Paso Natural Gas Corp., was operated at the same time at Petrochemie Schwechat, near Vienna, Austria. Since the starting material was synthesis gas produced from naphtha, different reaction conditions from those of the SASOL plant have also been operated successfully. 

Chemistry Department, University of Texas at El Paso, USA Environmental Science and Engineering, University of Texas at El Paso, USA Facultad de Quimica, Universidad de Guanajuato, Mexico... 

V. Armendariz, Bioreduction of Gold(III) to Gold(O) and Nanoparticle Formation by Oat and Wheat Biomasses The Use of Plants in Nanobiotechnology. Master Thesis, the University of Texas at El Paso, Chemistry Department, El Paso, TX, 2005, p. 107. 

In 1972, household dust samples taken near nonferrous ore smelters in El Paso, Texas, which were known to emit 1,012 metric tons of lead per year, had lead levels of 22,191 pg/g (geometric mean) and 973 pg/g at distances from the smelter of 1.6 km and 6.4 km, respectively (Landrigan and Baker 1981). 

Fig. 2. Pathophysiological sequence of events in periodontal disease. Bacteria produce byproducts (e.g. toxins or enzymes) which, along with mucus, constantly form a sticky, colorless plaque on teeth. If not removed, plaque can harden and form bacteria-harboring tartar around teeth. Tissue that attaches the gums to the teeth can be destroyed by the irritants of plaque. If this is the case, gums pull away from the teeth and small pockets arise between the teeth and gums. The pockets then become filled with more plaque, deepen, and it becomes impossible to clean plaque out. At this stage the bone structure supporting teeth can actually be destroyed (courtesy of Drs J. Chavez and S.E. Zaragoza, El Paso Community College, Texas, USA).

Department of Chemistry, The University of Texas, El Paso, Texas, USA... 

Econamine A process for removing acid gases from natural gas by selective absorption in diglycolamine (also called [2-(2-aminoethoxy) ethanol], and DGA). Developed by the Fluor Corporation, the El Paso Natural Gas Company, and the Jefferson Chemical Company and widely used. Later versions, developed by Fluor Daniel International, include the Fluor Daniel Econamine and the Econamine FG processes. More than 30 units were operating in 1996. See also Aromex. 

Fluor Solvent A process for removing carbon dioxide from natural gas and various industrial gas streams by dissolution in propylene carbonate. Carbon dioxide is much more soluble than other common gases in this solvent at low temperatures. The process cannot be used when hydrogen sulfide is present. The process was invented in 1958 by A. L. Kohl and F. E. Miller at the Fluor Corporation, Los Angeles. It is now licensed by Fluor Daniel. The first plant was built for the Terrell County Treating plant, El Paso, TX in 1960 by 1985, 13 plants were operating. 

Mehra (1) [Named after the inventor] A process for extracting particular hydrocarbons from natural or synthetic gas streams using solvent extraction into polyalkylene glycol dialkyl ethers. Invented in 1982 by Y. R. Mehra at the El Paso Hydrocarbons Company, Odessa, TX. U.S. Patent 4,421,535. 

The two transects crossed multiple, complex environments with widely diverse surficial materials, topography, climate, landforms, land covers, and land uses. A north-to-south (N-S) transect extended from northern Manitoba, Canada, to the US-Mexico border near El Paso, Texas. A west-to-east (W-E) transect followed the 38th parallel from just north of San... 

In helping to create a consensus set of guidelines, a number of individual and groups provided valuable assistance and review. These include Ted Krauthammer of Penn State, chairman of ACI committee 370 (Short Duration Dynamic and Vibratory Load Effects), Paul Mlakar of Jaycor, chairman of the ASCE Task Committee on Physical Security, and Quentin Baker of Wilfred Baker Engineering. Reviewers included Brad Otis of Shell Oil Company, Al Wusslcr of El Paso Natural Gas Company, and Eve Hinman of Failure Analysis Associates. 

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