Frasch. Herman

Four-coordinate metal complex, 413 Franklin, Rosalind, 628 Frasch, Herman, 558... 

The ingenious process of melting suhlerranean sulfur with superheated water and forcing it to the surface with compressed air was devised and perfected by Herman Frasch in the period 1891-4. Oiiginally designed to overcome the problems of recovering sulfur from the caprock of salt domes far below the swamps and quicksands of Louisiana, the method is now also extensively used elsewhere To extract native sulfiu. ... 

Sulfur is mined by the recovery method known as the Frasch process, which was invented by Herman Frasch in Germany in the early 1900s. This process forces superheated water, under pressure, into deep underground sulfur deposits. Compressed air then forces the molten sulfur to the surface, where it is cooled. There are other methods for mining sulfur, but the Frasch process is the most important and most economical. 

Sulfur in Louisiana and Texas. Prospectors who were boring for petroleum in Louisiana in 1865 discovered a great sulfur deposit beneath a layer of quicksand five hundred feet thick (251). After several companies had failed in all attempts to exploit this sulfur, Herman Frasch in about 1890 began to study the problem. His method of attack is carefully recorded in his address of acceptance of the Perkin Medal in 1912. 

Herman Frasch was educated in Germany as an apothecary s apprentice, and came to the United States at the age of sixteen years (274). After spending most of his life in this country and making many notable contributions to chemical engineering, he lived in retirement in France, where he died in 1914 at the age of sixty-two years (252). 

Presentation of the Perkin Medal to Herman Frasch, Met. Chem. Eng.,... 

Herman Frasch, chemical engineer, Chem. Eng. News, 20, 730 (June 10,... 

MOST OF OUR SULFUR IS PRODUCED BY DRIVING IT OUT OF THE GROUND IN MELTED FORM BY A PROCESS INVENT- ED BY HERMAN FRASCH. 

FRASCH PROCESS. A process by which much of the world s sulfur is obtained. Developed about 1900 by Herman Frasch, the process involves melting sulfur underground by introducing superheated water through a pipe under pressure and forcing the molten sulfur to the surface by compressed air... 

A.L.S. wishes to thank NSERC of Canada for financial support in the form of a Postdoctoral Fellowship. We gratefully acknowledge support from the National Science Foundation, the National Institutes of Health, the donors of the Petroleum Research Fund (administered by the American Chemical Society) and the Herman Frasch Foundation. 

About 60% of the sulfur produced in the United States comes from the underground deposits of elemental sulfur found in Texas and Louisiana. This sulfur is recovered by using the Frasch process developed by Herman Frasch in the 1890s. Superheated water is pumped into the deposit to melt the sulfur (mp = 113°C), which is then forced to the surface by air pressure (see Fig. 19.16). The remaining 40% of sulfur produced in the United States either is a by-product of the purification of fossil fuels before combustion to prevent pollution or comes from the sulfur dioxide (S02) scrubbed from the exhaust gases when sulfur-containing fuels are burned. 

One of the most important developments in sulfur mining was the development of the Frasch process which allowed it to be extracted from salt domes, particularly along the US Gulf Coast. Herman Frasch became involved in oil and sulfur mining and invented a process which allows liquid sulfur to be recovered with injection wells. Water at 330 °C is injected through wells into formations. The molten sulfur is extracted in a very pure form. It is an efficient method for mining sulfur, but the process can also produce saline wastewaters, increases in pH levels, and a high concentration of dissolved salts such as sodium chloride (TWRI, 1986). 

Herman Frasch Desulphurized Petroleum and Louisiana Sulphur. 

The Frasch method is one of the most famous mining systems ever invented. It was developed by German-American chemist Herman Frasch (1851-1914) in 1887. 

In the 1890s, the Frasch process (left) was invented by Herman Frasch. Hot water is pumped into an underground sulfur deposit where it melts the sulfur. Then, the liquid sulfur is brought to the surface by forcing air into the deposit. Liquid sulfur is shown solidifying after removal from a deposit (right). 

Herman Frasch (1851-1914). German chemical engineer. Besides inventing the process for obtaining pure sulfur, Frasch... 

The work presented from this laboratory was supported by funds from the Alabama Agricultural Experiment Station (Project ALA-5-877), the Herman Frasch Foundation and the Ciba-Geigy Corporation. Contributors to this work are Dr. Michel Sancholle, H. Gary Hancock, Dory Kirby, Mitch Wise, Vivi Karathanasis, Sabrina Barber-Azzouz, Mieke Van Den Reek, and Scott McCraney. 

The Herman Frasch Process for recovery of sulfur from underground salt domes is commercialized... 

This work was supported by Grants 83-CRCR-1-1334 from the United States Department of Agriculture-CRG and 0188 HF from the Herman Frasch Foundation of the American Chemical Society (to W.D.F.)... 

Frasch process. The process is nam after Herman Frasch, who invented it in the early 1890s. The process is particularly useful for recovering sulfur from deposits located under quicksand or water. 

Miriam C. Nagel, "Herman Frasch, Sulfur King," /. Chem. Educ., Vol. 58, 1981,60-61. 

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