
	Where results make sense

Topic: Lead chamber process

Related Topics

Superacid

Sulfuric acid

Sulphuric acid

Acid

Perchloric acid

Nitric acid

Potassium nitrate

In the News (Fri 11 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	AllRefer.com - lead, chemical element : Uses, Compound & Element (Compounds And Elements) - Encyclopedia
		Lead is used for covering cables and as a lining for laboratory sinks, tanks, and the "chambers" in the lead-chamber process for the manufacture of sulfuric acid.
		Lead acetate (sugar of lead) is used as a mordant, and lead azide, Pb(N
		Although lead and most of its compounds are only slightly soluble in water, the use of lead pipe to carry drinking water is dangerous, since lead is a cumulative poison that is not excreted from the body (see lead poisoning).
	reference.allrefer.com /encyclopedia/L/lead-uses.html (406 words)

	Industrial process - Wikipedia, the free encyclopedia
		Industrial processes are procedures involving chemical or mechanical steps to aid in the manufacture of an item or items, usually carried out on a large scale.
		Most of the processes are complex and require large capital investments in machinery, or a substantial amount of raw materials, in comparison to batch or craft processes.
		Temperatures of 1300 K were produced around the 8th century by blowing air through the heated mixture in a bloomery or blast furnace (12th century); producing a strong but brittle cast iron.
	en.wikipedia.org /wiki/Industrial_process (960 words)

	Search Results for "Chamber Process" (Site not responding. Last check: 2007-10-26)
		...One of the oldest metals used by humanity, lead was known to the ancient Egyptians and Babylonians.
		In 1987, D'Alema was elected to the Italian Chamber...
		...Heat is evolved in exothermic processes and absorbed in endothermic processes; such processes include chemical reactions, transitions between the states of matter,...
	bartleby.com /cgi-bin/texis/webinator/65search?query=Chamber+Process (271 words)

	Lead in the Water
		In the lead chamber process purification is carried out only to the extent of removing substances that could clog the machinery.(7) Of the common metals, only lead is resistant to cold sulfuric acid in concentrations up to 100%.
		Newsweek in its article on lead and the threat to children (15) said that pregnant women passed this toxic substance to their unborn children by eating, drinking, or breathing it.
		The lead is in the water--and in foods and beverages prepared with the water.
	www.sonic.net /~kryptox/environ/lead/lead.htm (1222 words)

	Sulphuric Acid - MSN Encarta
		It is used in the manufacture of ether, nitroglycerine, and dyes for its property as a desiccant.
		When concentrated sulphuric acid is heated, it behaves as an oxidizing agent, capable, for example, of dissolving such relatively unreactive metals as copper, mercury, and lead to produce metal sulphate, sulphur dioxide, and water.
		The second method of manufacturing sulphuric acid, the contact process, which came into commercial use about 1900, depends on oxidation of sulphur dioxide to sulphur trioxide, SO, under the accelerating influence of a catalyst.
	uk.encarta.msn.com /encyclopedia_761566936/Sulphuric_Acid.html (841 words)

	Sulphuric acid
		The lead chamber process, the older of the two processes, is used to produce much of the acid used to make fertilizers; it produces a relatively dilute acid (62%–78% H2SO4).
		The chamber may be a large, boxlike room or an enclosure in the form of a truncated cone.
		After the gases have passed through the chambers they are passed into a reactor called the Gay-Lussac tower where they are washed with cooled concentrated acid (from the Glover tower); the nitrogen oxides and unreacted sulphur dioxide dissolve in the acid to form the nitrous vitriol used in the Glover tower.
	ibchem.com /IB/ibnotes/full/ope_htm/sulphuric_acid.htm (628 words)

	Sulfuric Acid - Printer-friendly - MSN Encarta
		In these towers, sulfur-dioxide gas, air, steam, and oxides of nitrogen react to yield sulfuric acid as fine droplets that fall to the bottom of the chamber.
		Almost all the nitrogen oxides are recovered from the outflowing gas and are brought back to the chamber to be used again.
		About 20 percent of all sulfuric acid is now made by the lead-chamber process, but that percentage is diminishing.
	encarta.msn.com /text_761566936___3/Sulfuric_Acid.html (324 words)

	Sulphuric Acid Home Page
		However, the lead-chamber process was replaced in the 1930's by the contact process.
		The name of the process is taken from the fact that the reaction takes place by contact of the gaseous mixture with the surface of the solid catalyst.
		The acid from the Chamber process is not usually concentrated beyond 78% to 80%.
	www.chem.shef.ac.uk /chm131-1999/cha99mp/manu.html (875 words)

	Sulfuric Acid - MSN Encarta
		When concentrated sulfuric acid is heated, it behaves also as an oxidizing agent, capable, for example, of dissolving such relatively unreactive metals as copper, mercury, and lead to produce metal sulfate, sulfur dioxide, and water.
		The second method of manufacturing sulfuric acid, the contact process, which came into commercial use about 1900, depends on oxidation of sulfur dioxide to sulfur trioxide, SO, under the accelerating influence of a catalyst (see Catalysis).
		One of the few consumer products containing sulfuric acid as such is the lead storage battery, or car energizer.
	ca.encarta.msn.com /encyclopedia_761566936/Sulfuric_Acid.html (857 words)

	HighBeam Encyclopedia - lead chamber process (Site not responding. Last check: 2007-10-26)
		Chambers leads regional champs ready to face world's elite
		League of Women Voters of Los Angeles and the Los Angeles Area Chamber of Commerce Lead City Government and Ethics Reform Effort.
		US Chamber: mills at lead in new era of manufacturing.
	www.encyclopedia.com /html/X/X-leadcham.asp (206 words)

	Contact process - Wikipedia, the free encyclopedia
		The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes.
		This process was patented in 1831 by the British vinegar merchant Peregrine Phillips, as a far more economical process for producing sulfur trioxide and concentrated sulfuric acid than the previous lead chamber process method used for producing sulfuric acid.
		Catalytic oxidation (using vanadium oxide catalyst) of sulfur dioxide to sulfur trioxide
	en.wikipedia.org /wiki/Contact_process (253 words)

	Chemical Sciences: Inorganic Industrial Chemistry: The Acid Industry
		The dependence of the process upon green vitriol, which is not a common mineral, and low yield led to its replacement by the per campanem (by the bell) method prior to 1700.
		This process was used until 1746, when it was superseded by the lead chamber process The lead chamber process, chemically identical to the per campanem process, permitted large-scale sulfuric acid production.
		This process is particularly useful because hydrogen is produced in the same chloralkali process that produces chlorine, so reaction of the two gases coming from the same cell yields HCl with no byproducts.
	www.ualberta.ca /~jplambec/che/p101/p01262.htm (810 words)

	Sulfuric acid: Pumping up the volume
		In such a lead chamber, Roebuck could produce a hundred pounds or more of sulfuric acid at a time, compared with only a few pounds possible in a glass jar.
		The lead chamber was introduced to the United States when John Harrison, then only 20 years old, set up a plant in Philadelphia in 1793.
		Acid produced in a lead chamber cannot be concentrated to greater than 78% purity, even with distillation.
	pubs.acs.org /subscribe/journals/tcaw/10/i09/html/09chemch.html (1628 words)

	View Newsletter For Category: Acid Industry
		citric acid cleaning and passivation process is based on a new technology using safe and environmentally friendly citric acid to remove the free iron from the surface of stainless steel and chromium enrich the surface.
		QIAGEN"s position as the world"s leading provider of products and services for separating, purifying and handling nucleic acids is based on a broad range of proprietary technologies which are the basis for a portfolio which addresses more than 80 different applications in nucleic acid handling, separation and purification.
		Sulfuric acid is used as a catalyst in the alkylation process within a refinery.
	www.chemicalhouse.com:8080 /nl_new/jsp/viewnewsletter.jsp?id=109 (3065 words)

	Caveman to Chemist Projects: Chloralkali
		In 1746, John Roebuck pioneered the lead chamber process for the manufacture of cheap sulfuric acid in several ton quantities.
		Nevertheless, the process became the mainstay of the alkali industry and by 1885 it was being used to produce more than 400,000 tons per year.
		The hydrogen sulfide was then used as a feedstock for the lead chamber, which produced much needed sulfuric acid.
	cavemanchemistry.com /oldcave/projects/chloralkali (2767 words)

	The Alkali, & c. Works Order (Northern Ireland) 1991
		Sulphuric acid (Class II) worksWorks in which the manufacture of sulphuric acid is carried on by any process other than the lead chamber process, and works for the concentration or distillation of sulphuric acid.
		Chemical fertilizer worksWorks in which the manufacturer of chemical fertilizer is carried on, and works in which any mineral phosphate is subjected to treatment involving chemical change through the application or use of any acid and works for the granulating of chemical fertilizers involving the evolution of any noxious or offensive gas.
		Nitrate and chloride of iron worksWorks in which nitric acid or a nitrate is used in the manufacture of nitrate or chloride of iron.
	www.opsi.gov.uk /sr/sr1991/Nisr_19910049_en_3.htm (2744 words)

	Home Page (Site not responding. Last check: 2007-10-26)
		To achieve a high final conversion, the total catalyst mass is divided up in several catalyst beds and hot gas leaving each bed is cooled to a lower temperature before the gas enters the next bed.
		About 35% of the heat generated during the process serves to raise the temperature of the sulfuric acid produced (Hermann 1994).
		Nevertheless, the nitrogen oxide processes are of interest not only from the point of view of the history of chemical technology but also because they have certain characteristics that may qualify them or use even today.
	basc.chem-eng.utoronto.ca /~basu (1160 words)

	Definitions of leaching, lead-chamber process, LEP, Lense-Thirring effect, lepton, lepton number, conservation - ...
		The process was expensive and only produced dilute acid of up to 78%.
		Originally introduced by John Roebuck in 1746, the lead-chamber process was used in large-scale industrial production of sulfuric acid, until it was replaced by the contact process in 1876.
		It is used to determine the validity of a process in particle physics by making use the law of the conservation of lepton number.
	dictionary.etacude.com /l/LD_LF.php (491 words)

	Chas. S. Lewis & Co.
		However, large scale production of sulphuric acid awaited the eighteenth century and the introduction of the lead chamber process, which was superseded after nearly two centuries by the contact process.
		Today, sulphuric acid is produced in greater volume than any other chemical commodity and has been widely recognized as an accurate indicator of the state of a nation's industrial development.
		Accordingly, the sulphuric acid pump designer must consider the presence of chemical impurities as well as high fluid specific gravity and the nominal corrosive and abrasive properties of a particular process specification before making his recommendation for a particular producing plant application.
	www.lewispumps.com /sulphuricpump (715 words)

	bmj.com Rapid Responses for Mayor, 325 (7364) 564 (Site not responding. Last check: 2007-10-26)
		In this process, purification is carried out only to the extent of removing substances that could clog the machinery.
		This allows a certain amount of lead to be leached during the procedure.
		In their analysis, the investigators found that levels of lead in children's blood was significantly higher in Massachusetts communities using the silicofluorides, fluosilicic acid and sodium silicofluoride than in towns where water is treated with sodium fluoride or not fluoridated at all.
	bmj.bmjjournals.com /cgi/eletters/325/7364/564/b (4422 words)

	lead chamber process
		More on lead chamber process from Fact Monster:
		sulfuric acid: Production of Sulfuric Acid - Production of Sulfuric Acid There are two major processes (lead chamber and contact) for production...
		lead, chemical element: Uses - Uses The single most important commercial use of lead is in the manufacture of lead-acid storage...
	www.factmonster.com /ce6/sci/A0915523.html (116 words)

	Sulfuric acid effects on health and the environment
		The first major industrial demand for sulfuric acid was the Leblanc process for making sodium carbonate (developed c.
		A process for its synthesis by burning sulfur with saltpeter (potassium nitrate) was first used by
		It was soon superseded by the lead chamber process, invented by
	www.corrosion-doctors.org /Acids/Sulfuric.htm (157 words)

	lead chamber process
		Solving process problems at the molecular flux level: working from pressure readings alone can mislead and misdirect a search for......
		Engine/Hydraulic matchup leads line revamp: John Deere meets Tier II emissions standards with C-Series excavators, and improves fuel......
		Establishing process, design parameters for permanent mold cast lead-free copper alloys.
	www.infoplease.com /ce6/sci/A0915523.html (240 words)

	Sulfuric Acid - ENCYCLOPEDIA - The History Channel UK (Site not responding. Last check: 2007-10-26)
		The lead chamber process, the older of the two processes, is used to produce much of the acid used to make fertilizers; it produces a relatively dilute acid (62%-78% H
		In the contact process, purified sulfur dioxide and air are mixed, heated to about 450°C;, and passed over a catalyst; the sulfur dioxide is oxidized to sulfur trioxide.
		Except as otherwise permitted by written agreement, the following are prohibited: copying substantial portions or the entirety of the work in machine readable form, making multiple printouts thereof, and other uses of the work inconsistent with U.S. and applicable foreign copyright and related laws.
	www.thehistorychannel.co.uk /site/search/search.php?word=sulfuric (1266 words)

	History Channel Search Results
		This discovery gave rise to an increase in the commercial production of sulfuric acid and led to improved methods of manufacture.
		In their initial steps, both require the use of sulfuric dioxide, which is produced by burning iron pyrites, FeS2, or sulfur, in air.
		The second method of manufacturing sulfuric acid, the contact process, which came into commercial use about 1900, depends on oxidation of sulfur dioxide to sulfur trioxide, SO3, under the accelerating influence of a catalyst (see
	www.historychannel.com /thcsearch/thc_resourcedetail.do?encyc_id=223351 (856 words)

	Nitric Acid
		The oxides of nitrogen, nitric oxide, NO, and nitrogen dioxide, NO, are both collectively known as NOx, and are familiar as one of the several components of automobile exhaust that create smog.
		The Ostwald process was discovered just in time for the First World War, and it contributed greatly to the extended length of that war.
		When hostilities began, the shipping routes to Germany across the Atlantic were blocked, and so the Ostwald process gave Germany the ability to carry on the war far longer than it would otherwise have been able.
	www.ch.ic.ac.uk /vchemlib/mim/bristol/nitric/nitric_text.htm (1307 words)

	1746 in science (Site not responding. Last check: 2007-10-26)
		See also: 1745 in science, other events of 1746, 1747 in science and the list of years in science.
		John Roebuck invents the lead-chamber process for the manufacture of sulphuric acid
		German chemist Andreas Sigismund Marggraf (1709-1782) is credited with describing zinc as a separate metal
	www.1-free-software.com /en/wikipedia/1/17/1746_in_science.html (159 words)

	Acids
		Sulphuric acid was manufactured by the lead-chamber process
		until the mid-1930s, but this process has now been replaced by the contact process, involving the catalytic oxidation of sulphur dioxide.
		The structure of sulphuric acid is considered to be a mixture of several rapidly interconverting equivalent forms.
	www.chm.bris.ac.uk /webprojects2001/anderson/acids.htm (445 words)

Try your search on: Qwika (all wikis)