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Topic: Rhenium

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Periodic table period

Group 7 element

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Molybdenum

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Iridium

	C&EN: IT'S ELEMENTAL: THE PERIODIC TABLE - RHENIUM
		Rhenium, element 75 on the periodic table, belongs to the cluster of elements known as the transition group of elements.
		Because of rhenium's high resistance to poisoning from nitrogen, sulfur, and phosphorus, rhenium catalysts are used for the hydrogenation of fine chemicals and the disproportionation of alkenes.
		Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur, and phosphorus and are used for the hydrogenation of fine chemicals, hydrocracking, reforming, and the disproportionation of alkenes.
	pubs.acs.org /cen/80th/rhenium.html (633 words)

	Re - Rhenium
		Rhenium does not occur free in nature or as a compound in a distinct mineral species.It is, however, widely spread throughout the earth's crust to the extent of about 0.001ppm.
		Commercial rhenium in the U.S. today is obtained from molybdenum roaster-flue dustsobtained from copper-sulfide ores mined in the vicinity of Miami, Arizona, and elsewherein Arizona and Utah.
		Rhenium metal is prepared by reducing ammoniumperrhentate with hydrogen at elevated temperatures.
	www.physlink.com /Reference/ChemicalElements/rhenium.cfm (155 words)

	Rhenium (Re) - Chemical properties, Health and Environmental effects
		Rhenium is a silvery metal but rarely seen as such on account of its high melting point, which is the third highest after carbon and tungsten.
		Rhenium is used as an important component in superalloys for blades in turbine engines and this is the major use today.
		Rhenium is added to tungsten and molybdenum to form alloys that are used as filaments for ovens and lamps.
	www.lenntech.com /Periodic-chart-elements/Re-en.htm (361 words)

	It's Elemental - The Element Rhenium
		Rhenium was discovered by the German chemists Ida Tacke-Noddack, Walter Noddack and Otto Carl Berg in 1925.
		Today, rhenium is obtained as a byproduct of refining molybdenum and copper.
		Rhenium is used in flash lamps for photography and for filaments in mass spectrographs and ion gages, but is most frequently used as an alloying agent in tungsten and molybdenum and as a catalyst for performing certain reactions to a type of hydrocarbon known as an olefin.
	education.jlab.org /itselemental/ele075.html (129 words)

	Mineral Information Institute - RHENIUM
		Rhenium is a very rare element that is produced principally as a by-product of the processing of porphry copper-molybdenum ores.
		Because it is scarce, very little rhenium is actually processed and isolated each year as compared to the millions of tons of copper and millions of pounds of molybdenum that are extracted from these same porphry copper deposits.
		Rhenium is obtained almost exclusively as a by-product of the processing of a special type of copper deposit known as a porphyry copper deposit.
	www.mii.org /Minerals/photorhenium.html (577 words)

	rhenium — FactMonster.com
		In the United States rhenium is obtained commercially as a byproduct of the roasting of copper sulfide ores from Arizona and Utah.
		Rhenium metal is obtained as a powder by reduction of its compounds with hydrogen.
		Rhenium is used as a catalyst for hydrogenation and petroleum cracking.
	www.factmonster.com /ce6/sci/A0841705.html (320 words)

	REMBAR Rhenium Technical Info
		Rhenium has several unique properties that are also imparted to its alloys.
		Rhenium is available only in a very limited size range: about 3" wide for foil and sheet and only up to about 1/2" diameter in rod.
		When rhenium is alloyed with molybdenum or tungsten, it imparts its properties to these materials and permits a cost-effective solution.
	www.rembar.com /Rhenium.htm (702 words)

	Chemistry : Periodic Table : rhenium : key information
		rhenium is available in many forms including foil, powder, ribbon, rod, and wire.
		Small and large samples of rhenium foil like this, as well as wire, can be purchased from Advent Research Materials via their web catalogue.
		Rhenium is silvery white with a metallic lustre; its density is exceeded only by that of platinum, iridium, and osmium, and its melting point is exceeded only by that of tungsten and carbon.
	www.webelements.com /webelements/elements/text/Re/key.html (146 words)

	Rhenium Redefined
		Rhenium is one of Earth's rarest naturally occurring metals and is required by NASA for various space applications.
		This makes it attractive because a rocket made of rhenium could be cooled by simply radiating its heat into space, instead of being cooled by alternative means, which are presently a major source of fuel inefficiency in spacecraft.
		Rhenium Alloys, Inc., makes rhenium a practical choice in manufacturing fields, including the aerospace, nuclear, and electronic industries, with upcoming opportunities projected in medical instrumentation.
	www.nasatech.com /Spinoff/spinoff2001/ip11.html (386 words)

	USGS Minerals Information: Rhenium
		Rhenium (Re), the last naturally-occurring element to be discovered, was discovered in Germany in 1925.
		These alloys found important applications in industry that resulted in a great demand for the rhenium produced from the molybdenite fraction of porphyry copper ores.
		Important uses of rhenium have been in platinum-rhenium catalysts, used primarily in producing lead-free, high-octane gasoline and in high-temperature superalloys used for jet engine components.
	minerals.usgs.gov /minerals/pubs/commodity/rhenium (171 words)

	CRCPress Periodic Table Online: Cadmium
		Rhenium metal is prepared by reducing ammonium perrhenate with hydrogen at elevated temperatures.
		Rhenium is used as an additive to tungsten and molybdenum-based alloys to impart useful properties.
		Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur, and phosphorus, and are used for hydrogenation of fine chemicals, hydrocracking, reforming, and disproportionation of olefins.
	www.chemnetbase.com /periodic_table/elements/rhenium.htm (401 words)

	Wikinfo \| Rhenium (Site not responding. Last check: )
		Rhenium is obtained as a by-product of molybdenum refinement and rhenium-molybdenum alloys are superconducting.
		Rhenium is a silvery white metal, lustrous, and has one of the highest melting points of all elements, exceeded by only tungsten and carbon.
		Rhenium is not naturally found free in nature or even as a compound in a distinct mineral species.
	www.wikinfo.org /wiki.php?title=Rhenium (597 words)

	The Hendrix Group - Rhenium
		Commercial rhenium in the U.S. today is obtained from molybdenum roaster-flue dusts obtained from copper-sulfide ores mined in the vicinity of Miami, Arizona, and elsewhere in Arizona and Utah.
		Rhenium is used as an additive to tungsten and molybdenum -based alloys to impart useful properties.
		Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur, and phosphorus, and are used for hydrogenation of fine chemicals.
	www.hghouston.com /elements/75.html (409 words)

	Rhenium - Wikipedia, the free encyclopedia
		Rhenium (IPA: /ˈɹiːniəm/) is a chemical element in the periodic table that has the symbol Re and atomic number 75.
		Rhenium wire is used in photoflash lamps in photography.
		Rhenium is not found free in nature, and it was only recently that the first rhenium mineral was found.
	en.wikipedia.org /wiki/Rhenium (669 words)

	AllRefer.com - rhenium, Compound & Element (Compounds And Elements) - Encyclopedia
		In the United States rhenium is obtained commercially as a byproduct of the roasting of copper sulfide ores from Arizona and Utah.
		Rhenium metal is obtained as a powder by reduction of its compounds with hydrogen.
		Rhenium is used as a catalyst for hydrogenation and petroleum cracking.
	reference.allrefer.com /encyclopedia/R/rhenium.html (366 words)

	ELEMENT: RHENIUM
		Commercial rhenium in the U.S. today is obtained from molybdenum roaster-flue dusts obtained from copper-sulfide ores mined in the vicinity of Miami, Arizona, and elsewhere in Arizona and Utah.
		Rhenium is used as an additive to tungsten and molybdenum -based alloys to impart useful properties.
		Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur, and phosphorus, and are used for hydrogenation of fine chemicals.
	www.radiochemistry.org /periodictable/elements/75.html (389 words)

	The Elements: Rhenium (Site not responding. Last check: )
		Commercial rhenium in the U.S. today is obtained from molybdenite roaster-flue dusts obtained from copper-sulfide ores mined in the vicinity of Miami, Arizona, and elsewhere in Arizona and Utah.
		Rhenium is used as an additive to tungsten and molybdenum-based alloys to impart useful properties.
		Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur, and phosphorus, and are used for hydrogenation of fine chemicals, hydrocracking, reforming, and the disproportionation of olefins.
	www.cmbi.kun.nl /~ott/elements/rhenium.html (401 words)

	Rhenium
		Rhenium metal is not found as such in nature, nor do its compounds exist in as distinct minerals.
		Commercially, rhenium is obtained as a by-product of copper smelting from molybdenum bearing copper ores.
		The rhenium is liberated from the molybdenite via high temperature roasting and is often converted and sold as the ammonium salt, ammonium perrhenate (APR), from which it may be further purified.
	www.azom.com /details.asp?ArticleID=1491 (547 words)

	Rhenium (Re) (Site not responding. Last check: )
		Rhenium is a rare, silvery white, metallic element.
		Rhenium is widely used in electrical filaments, welding rods, thermocouples and cryogenic magnets.
		Rhenium wire is used in photoflash lamps for photography.
	www.bayerus.com /msms/fun/pages/periodic/rhenium (160 words)

	rhenium - Search Results - MSN Encarta
		Rhenium, symbol Re, rare, silvery white, metallic element.
		Rhenium is one of the transition elements of the...
		The chemistry article has been prepared in two parts: the first section deals with chemical research, the second with the chemical industry.
	ca.encarta.msn.com /rhenium.html (65 words)

	Rhenium - Search Results - ninemsn Encarta
		Rhenium is one of the transition elements of the...
		While the properties of quarks and other kinds of particle are partly accounted for by the so-called standard model of present-day physics, many...
		New techniques date various rock deposits by determining the concentrations of rhenium and osmium isotopes in them.
	au.encarta.msn.com /Rhenium.html (82 words)

	Rhenium Summary
		The principal ores of rhenium are molybdenite, gadolinite, and columbite.
		Rhenium is obtained as a by-product of molybdenum refinement and rhenium-molybdenum alloys are superconducting.
		Rhenium is a silvery white metal, lustrous, and has one of the highest melting points of all elements, exceeded by only tungsten and carbon.
	www.bookrags.com /Rhenium (2464 words)

	Rhenium & Alloys Products
		Rhenium also does not have a ductile-to-brittle transition temperature it maintains its ductility from absolute zero all the way to its melting point and also has a high modulus of elasticity.
		Arc melting of rhenium in an inert atmosphere or vacuum is possible but the metal produced tends to have coarse grain size and may have segregation of rhenium oxides at the grain boundaries.
		Rhenium powder is consolidated at pressure to a density of approximately 60% of the theoretical density of solid rhenium.
	www.hcrosscompany.com /refractory/rhenium.htm (922 words)

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