frasch method
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frasch process — ˈfräsh noun or frasch method Usage: usually capitalized F Etymology: after Herman Frasch died 1914 American chemist born in Germany, its inventor : a method of mining deep lying sulfur by forcing into the deposit very hot water and pumping out… … Useful english dictionary
Frasch process — /frahsh/ a method of mining sulfur by pumping superheated water down into the deposit, thereby melting it so that it can be pumped to the surface. [after Hermann Frasch, German born U.S. chemical engineer, who developed it] * * * ▪ mining… … Universalium
Frasch process — The Frasch process is a method to extract sulfur from underground deposits. Most of the world s sulfur is obtained this way.Holes are drilled down through the overlying rock into the sulfur deposits. A special series of pipes are then inserted… … Wikipedia
Frasch, Herman — ▪ American chemist born Dec. 25, 1851, Gaildorf, Württemberg died May 1, 1914, Paris U.S. chemist who devised the sulfur mining process named in his honour. The Frasch process, patented in 1891, was first used successfully in Louisiana and… … Universalium
Herman Frasch — Herman Frasch, Hermann Frasch (December 25, 1851, Oberrot bei Gaildorf, Württemberg May 1, 1914, Paris) was a mining engineer and inventor. In October 20, 1890, he took out three patents for the Frasch Process.He emigrated to the US in 1868. In… … Wikipedia
sulfur — /sul feuhr/, n. 1. Also, esp. Brit., sulphur. Chem. a nonmetallic element that exists in several forms, the ordinary one being a yellow rhombic crystalline solid, and that burns with a blue flame and a suffocating odor: used esp. in making… … Universalium
Sulphur, Louisiana — Geobox City name = City of Sulphur native name = other name = other name1 = category = City image size = image caption = flag size = symbol = symbol size = symbol type = nickname = motto = country = United States state = Louisiana region =… … Wikipedia
mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… … Universalium
Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine … Wikipedia
Transcranial doppler — (TCD) is a test that measures the velocity of blood flow through the brain s blood vessels. Used to help in the diagnosis of emboli, stenosis, vasospasm from a subarachnoid hemorrhage (bleeding from a ruptured aneurysm), and other problems, this… … Wikipedia
