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Topic: Frasch process

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	Stepsedu-The Exclusive site for a X Grader
		Is a process used to convert aldehydes and ketones to the corresponding hydrocarbons by heating with amalgamated zinc and hydrochloric acid.
		The process involves heating of calcium carbonate to give calcium oxide and carbon dioxide which is bubbled into a solution of sodium chloride in ammonia.
		A process used to prepare aluminium by electrolysis in which alumina (aluminium oxide) is desolved in cryolite (sodium aluminium fluoride) and electrolyzed.
	www.stepsedu.com /chem/processes.htm (450 words)

	Process for applying a heat-shrinkable material over sulfur well piping - Patent 4671833 (Site not responding. Last check: 2007-10-20)
		Process as claimed in claim 4 wherein the heat-shrunk polyfluoroolefin resin sleeve is a sleeve of a heat-shrunk polymer of fluorinated ethylenepropylene.
		Process as claimed in claim 4 wherein the heat-shrunk polyfluoroolefin resin sleeve is a sleeve of a heat-shrunk structural derivative of polytetrafluoroethylene containing perfluoroalkoxy side groups.
		Process as claimed in claim 12 wherein the heat-shrunk polyfluoroolefin resin sleeve is a sleeve of a heat-shrunk polymer of fluorinated ethylenepropylene.
	www.freepatentsonline.com /4671833.html (7766 words)

	Process for separating sulfur from ore - Patent 4923482
		The process according to claim 1 wherein said agent is present in the slurry in a ratio in the range of 1:400 to 1:20 agent to sulfur ore particles by weight.
		The process according to claim 1 wherein said aqueous phase includes residual molten sulfur, and wherein, after step 5, the residual molten sulfur is washed off of the gangue with a further quantity of dilute solution of an agent heated to a temperature at least equal to the melting point of sulfur.
		The process according to claim 19 further including the steps of passing the gangue and aqueous portion of the mixture from step 6 to a settling pond to settle the gangue from the aqueous phase, decanting the aqueous phase and returning at least a portion of it to each of steps 1 and 4.
	www.freepatentsonline.com /4923482.html (5792 words)

	[No title]
		The description of the Frasch process is as follows: Hot water is injected directly into the sulfur-containing mineral strata, melting the crystalline sulfur, which is then lifted to the surface with air.
		In mechanical processes, wood particles are torn apart, with all the materials contained in the wood remaining in the pulp.
		In the sulfate process, which is also known as the kraft process and is the more widely used of the two processes, the pulp is cooked with an alkaline cooking liquor; in the sulfite process, the cooking liquor is acidic (ForestSweden, [undated]).
	pubs.usgs.gov /of/2002/of02-298/of02-298.txt (20471 words)

	Handbook of Texas Online: SULFUR INDUSTRY
		In the Frasch process wells are drilled into deposits, the sulfur is melted with superheated water, and the molten sulfur is forced to the surface.
		Frasch production was concentrated in Fort Bend, Jefferson, Liberty, Matagorda, and Wharton counties, and in underground Permian strata in Pecos County.
		Frasch sulfur output in Texas increased by 4.7 percent, and recovered sulfur increased by 2.8 percent.
	www.tsha.utexas.edu /handbook/online/articles/SS/dks4.html (1631 words)

	revrul77-457
		At the taxpayer's processing facility the molten sulfur is held in storage tanks, where it is blended or commingled with other sulfur already in the storage tanks.
		For example, if mining processes cannot be effectively applied to a mineral without storage of the mineral while awaiting the application of such processes, such storage shall be treated as a process that is "necessary" to the accomplishment of such mining processes.
		The regulation also states that a process is "incidental" to the accomplishment of another related process if the cost thereof is insubstantial in relation to the cost of the related process, or if the process is merely the coincidental result of the application of the other process.
	www.taxlinks.com /rulings/1977/revrul77-457.htm (497 words)

	Search Results for "Process"
		...flotation process, in mineral treatment and mining, process for concentrating the metal-bearing mineral in an ore. Crude ore is ground to a fine powder and mixed...
		Pure hydrogen and nitrogen gases are mixed in the appropriate proportion, heated...
		...Frasch process, (frash) (KEY) [for Herman Frasch], process for the extraction of sulfur from subsurface deposits.
	www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Process (311 words)

	PART 436 -- MINERAL MINING AND PROCESSING POINT SOURCE CATEGORY
		The provisions of this supbart are applicable to the processing of asbestos and wollastonite.
		The provisions of this subpart are applicable to the processing of salines from brine lakes.
		The provisions of this subpart are applicable to the processing of tripoli.
	www.dec.state.ny.us /website/dow/bwp/ref750/40cfr436.html (6039 words)

	Category:Industrial processes - Wikipedia, the free encyclopedia
		An industrial process is a procedure that alters materials or substances (grinding, welding, heat treatment, etc).
		Some processes make the production of a rare material vastly cheaper, thus changing it into a commodity; i.e.
		the process makes it economically feasible for society to use the material on a large scale.
	en.wikipedia.org /wiki/Category:Industrial_processes (133 words)

	Herman Frasch Biography / Biography of Herman Frasch World of Chemistry Biography
		Frasch, the son of a prosperous apothecary, was born in Gaildorf, Württemberg (now part of Germany) on Christmas Day 1851.
		Frasch taught at the Philadelphia College of Pharmacy and continued to study chemistry with an eye to becoming an expert in a newly-emerging field, petroleum.
		Frasch sold his patent for an improved process for refining paraffin wax to a subsidiary of Standard Oil in 1877 and moved to Cleveland to open a laboratory and consulting office.
	www.bookrags.com /biography-herman-frasch-woc (266 words)

	Sulphur Manual Ch.1
		A diagram of a typical mining operation and a close-up of the Frasch method are found at the end of this chapter.
		This process, invented by English scientist C. Claus, is now the most widely used method for extraction of sulphur from sour gas.
		When the refiner or processing plant produces sulphur, it may be in a solid state (less than 238 degrees Fahrenheit) or in a molten state (greater than 238 degrees Fahrenheit).
	www.window.state.tx.us /taxinfo/audit/sulphur/ch1.htm (1063 words)

	Wayne Frasch (Site not responding. Last check: 2007-10-20)
		Dr. Frasch completed doctoral studies at the University of Kentucky in Lexington in 1979 and his postdoctoral studies in Biochemistry at the University of Wisconsin at Madison.
		Some of these processes include the mechanism of actino-myosin in the process of muscle contraction as well as the function of G-proteins, which mediate the communication of cellular responses to initiate gene expression.
		Frasch, W. (1994) "The F-type ATPase in Cyanobacteria: Pivotal Point in the Evolution of a Universal Enzyme", Molecular Biology of Cyanobacteria, D. Bryant, ed., Kluwer Acad.
	photoscience.la.asu.edu /photosyn/faculty/frasch.html (717 words)

	Sulfur Chemistry
		Frasch process force (99.5% pure) sulfur out by using hot water and air.
		Most sulfur mined by Frasch process is used in industry for the manufacture of sulfuric acid.
		The Frasch process is used to mine elemental sulfur.
	www.science.uwaterloo.ca /~cchieh/cact/c123/sulfur.html (858 words)

	Frasch sulfur recovery (from mining) -- Encyclopædia Britannica
		Although the Frasch process is used to recover sulfur from both bedded and salt-dome related deposits, only the latter type is described here.
		More results on "Frasch sulfur recovery (from mining)" when you join.
		The Frasch process, patented in 1891, was first used successfully in Louisiana and in east Texas.
	www.britannica.com /eb/article-81299 (843 words)

	Where does Sulphur Come From?
		In addition to its agricultural applications, sulphur is essential to a multitude of manufacturing processes for pharmaceuticals, paper, chemicals, paints, steel, petroleum and numerous other products, usually in the form of sulphuric acid.
		In the 1890's, Herman Frasch, a German-born petroleum scientist, conceived of a drilling-melting-pumping process to extract sulphur from the caprock section of salt domes.
		In this process, a hole is drilled into the sulphur bearing formation and cased.
	geowords.com /lostlinks/g20/12.htm (607 words)

	Frasch process
		Process used to extract underground deposits of sulphur.
		Compressed air is then pumped down to force the molten sulphur to the surface.
		The process was developed in the USA in 1891 by German-born Herman Frasch (1851–1914).
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0016504.html (106 words)

	FRASCH PROCESS (Site not responding. Last check: 2007-10-20)
		A process for mining native sulfur, in which superheated water is forced into the deposits for the purpose of melting the sulfur.
		The molten sulfur is then pumped to the surface b.
		A desulfurizing process that consists of distilling oil over lead oxide, followed by refining with sulfuric acid.
	www.websters-online-dictionary.org /Fr/Frasch_process.html (235 words)

	Sulphuric Acid: Sulphur Mining (Site not responding. Last check: 2007-10-20)
		This was, for example, one reason a settlement was developed on one of the Galapagos Islands as long ago as 1893.
		Deposits may be close to the surface, and be extracted by open cast mining, or may be deeper underground and are extracted by the Frasch Process.
		In the Frasch Process, a hole is drilled into the sulphur deposit and three concentric, encased pipes are lowered into the sulphur.
	www.uyseg.org /greener_industry/pages/sulphuric_acid/6SulphuricAcidMining.htm (170 words)

	Indiatimes Learning..........Excel@Examss/Science (Site not responding. Last check: 2007-10-20)
		Describe sequentially the processes, that led to the formation of petroleum in nature.
		Transplantation is the process of sowing seedlings in the field, after the seeds were first geminated to small seedlings stage in a separate seed-bed in the nurseries Its advantages are that:
		In the Frasch Process, a hole is bored to the sulphur beds.
	learning.indiatimes.com /test_papers/papers/sciencex/2000/answers21_33.htm (1642 words)

	Science Fair Projects - Frasch process
		These deposits have been extracted from the ground using the Frasch process.
		When the molten sulfur reaches the surface, it is pumped onto wooden blocks where the sulfur again solidifies.
		The Frasch process is able to produce sulfur of very high purity.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Frasch_process (309 words)

	Introduction (Site not responding. Last check: 2007-10-20)
		The lead-chamber process is the older of the two processes, and its product is aqueous sulphuric acid and it contains 62% to 78% sulphuric acid.
		The contact process yields pure sulphuric acid and most sulphuric acid produced by the contact process is manufactured by the inter-pass absorption (or double absorption) process.
		In this process, sulphur dioxide is absorbed by lime or N, N – dimethylaniline.
	basc.chem-eng.utoronto.ca /~leese/che200.html (1220 words)

	NSW HSC ONLINE - Chemistry
		Some sulfur is recovered from underground deposits of the element by the Frasch Process.
		Liquid sulfur obtained by the Frasch process is heated in dry air and sent to the catalytic converter.
		This reaction is called the Contact Process because sulfur dioxide and oxygen molecules react in contact with the surface of the catalyst, which is arranged in layers in towers.
	hsc.csu.edu.au /chemistry/options/industrial/2762/Ch953.htm (1878 words)

	Handbook of Texas Online: TEXASGULF
		In October 1891 Dr. Herman Frasch obtained a patent to use superheated water to melt sulfur crystals and pump the liquid to the surface and into vats, where it solidified into elemental sulfur.
		The Frasch process enabled large sulfur reserves to be mined, reduced domestic prices by 40 percent, and greatly reduced imports from abroad (mainly from Italy).
		On November 12, 1912, the first mine using the Frasch process was opened at Bryanmound, near Freeport.
	www.tsha.utexas.edu /handbook/online/articles/view/TT/dktgq.html (1852 words)

	Sulphur Chemistry for 14-16 Year-Olds: By Paul Farren, Loreto College, Coleraine.
		Sulphur is extracted from the ground by the frasch process.
		In the contact process, a mixture of sulphur dioxide and air is passed into a converter in which there are four layers of the catalyst.
		The catalyst, which is vanadium (v) oxide, is in the form of pellets to increase its surface area.
	www.lcc.ukf.net /chem/sulphur.htm (655 words)

	The Environmental Literacy Council - Sulfur
		The two most common methods of extracting sulfur are as a byproduct of industrial processes and with the Frasch process.
		The Frasch process was developed by the German chemical engineer Herman Frasch (1851-1914) in 1891.
		The key to the Frasch process is sulfur's low melting point of 112° C. When superheated water and compressed air are pumped down into underground sulfur deposits, a frothy mixture is created that can be pumped up to the surface as liquid sulfur.
	www.enviroliteracy.org /article.php/1016.php (1483 words)

	Book Report on Frasch Process of Mining Sulphur (Site not responding. Last check: 2007-10-20)
		The Frasch Process of Mining Sulphur Sulphur is a tasteless, odorless, light-yellow colored element that has been sought after for years for uses such as: sulphur compounds, medicine, matches, rubber, dyes, gunpowder, photography, and many more uses.
		That is until a man named Herman Frasch invented a new way to harvest the underground supplies of sulphur Before 1891 almost all sulphur came from Sicily.
		All of this was accomplished because of a chemist who had a dream and dared to turn it into reality.
	www.newessay.com /database/Frasch_Process_of_Mining_Sulph-111551.html (176 words)

	HoTnoodLe12's Xanga Site
		It is found as the native element in nature and extracted by the Frasch process.
		This is an interesting process since it means that sulphur can be extracted from underground without mining it.
		In the Frasch process underground deposits of sulphur are forced to the surface using superheated water and steam (160°C, 16 atmospheres, to melt the sulphur) and compressed air (25 atmospheres).
	www.xanga.com /HoTnoodLe12 (1220 words)

	Cameron Communications (Site not responding. Last check: 2007-10-20)
		The residence of Herman Frasch, inventor of the Sulphur Mining Process, was built in the early 1900's.
		The Frasch process allowed over nine million tons of sulphur to be extracted making Sulphur the leading mining town in the United States for over two decades.
		Sybil McNeill's painting of the historic Frasch home commemorates the 100th anniversary of Herman Frasch's process.
	www.camtel.com /print/gallery_1995.cfm (127 words)

	Profile
		We are using site-directed mutagenesis in Chlamydomonas to introduce mutations of single amino acid residues of couplingfactor to assess their relative importance in the catalytic mechanism.
		A second area of study concerns the oxygen-evolving complex in photosynthesis which is responsible for most of the oxygen in the atmosphere.
		Using these metal-substituted preparations we have found that at least one of the calcium ions is located a few Angstroms from the manganese ions that are responsible for oxidizing water to molecular oxygen.
	myprofile.cos.com /fraschw74 (722 words)

	Brimstone Historical Museum and Tourist Information Center
		This museum was established in 1976 to commemorate the development of the Frasch process of mining, which launched the American sulfur industry.
		Exhibits include a one-ton block of sulfur, display of the Frasch process and a short color movie explaining it and its importance to the industry.
		The museum itself is housed in the old depot of the Southern Pacific Railroad, which was moved from Frasch Park to its current location, 900 South Huntington, in early 2003.
	www.byways.org /browse/byways/2454/places/12668 (192 words)

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