Fmc Corporation

Other

Richard A Mohr

Theodore F Munday

James William Stamos

Sidney Berkowitz

John Francis Start

Hsiang P Liao

Peter H Zeh

Sushil K Bhalla

Somboon Tepnarumit

Robert Tolve

Dog bone with flossed ends

A spring finger EMI gasket is disclosed in which portions of its finger parts are so formed that they can be completely flattened with negligible permanent set. Thus when used in a seam, they can be flattened to provide broad are a metal-to-metal contact for low electrical impedance across the seam, while at the same time serving as a positive mechanical stop. In its preferred embodiment, when the seam is disassembled, the tips of the finger parts press firmly against one of the surfaces of the seam so as to resist snagging, a frequent cause of damage to spring fingers.

Device for providing electrical continuity between electrically

The excessive wear and formation of ring-like cavities in carbon crucibles used to contain iron-based compositions that are heated in a plasma furnace to a temperature of from about 2000.degree. C. to aboout 2700.degree. C. are reduced or eliminated by adding carbon particles to the crucible in amounts of at least about 6 weight percent of the melt, and preferably in amounts exceeding the solubility of carbon in the heated melt.

Process for increasing the life of carbon crucibles in plasma furnaces

Ferrophos is treated in a plasma furnace by maintaining an electric arc between a cathode and at least one point on the surface of the ferrophos which serves as the anode in the presence of an inert plasma gas, maintaining the average temperature of the ferrophos at about 2,000.degree. C. to about 2,700.degree. C., evolving gaseous phosphorus from the ferrophos until it contains less than about 7% by weight phosphorus, removing a purified phosphorus gas as one product and a metal concentrate having a reduced phosphorus content as a coproduct.

Process for recovering elemental phosphorus and a metal concentrate from

An organic solvent system, for use in solvent extraction of wet process phosphoric acid, is a mixture of an organic phosphate ester and an essentially water-immiscible organic ketone or alcohol.

Method of purifying phosphoric acid

Peroxycarboxylic acid compositions containing stabilizing ingredients are produced by the hydrogen peroxide peroxidation of corresponding carboxylic acids which are not substantially soluble in water by a continuous process in which the peroxidation reaction takes place in solution in concentrated sulfuric acid, or other strong acid, while that solution is intimately interdispersed, by means of agitation, with methylene chloride, or other organic solvent, in which the resulting peroxycarboxylic acid is soluble, but the carboxylic acid is not, and the sulfuric acid, or other acid, is recovered from the effluent of the process by reacting it with borax and caustic soda or soda ash to form crystals of boric acid and sodium salt of the strong acid which, in admixture with peroxycarboxylic acid recovered from the effluent, form the peroxycarboxylic acid composition product. The methylene chloride is also recovered from the effluent and recycled to the process.

Continuous process for the production of peroxycarboxylic acid

Manufacturing dry, free-flowing crystalline sodium carbonate peroxide by passing a gas stream at a temperature between 70.degree. and 150.degree. C into a drying zone containing moist sodium carbonate peroxide while maintaining the exit gas stream temperature between 50.degree. and 130.degree. C until the sodium carbonate contains between 0.05% and 0.5% by weight moisture, immediately passing the dried material into a cooling zone where the sodium carbonate peroxide temperature is lowered to between 0.degree. and 40.degree. C, and removing a dry, free-flowing, crystalline sodium carbonate peroxide product containing between 0.001% and 0.20% by weight moisture.

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Martinsville, NJ, United States of America

Richard A Mohr