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Topic: Sulphuric acid

	Sulphuric Acid - LoveToKnow 1911
		SULPHURIC ACID, or OIL OF Vitriol, H2so 4, perhaps the most important of all chemicals, both on account of the large quantities made in all industrial countries and of the multifarious uses to which it is put.
		Sulphuric acid, being a dibasic acid, forms two series of salts with monovalent metals: an acid sulphate, Mhso 4, and a normal sulphate, M 2 50 4.
		The prognosis of sulphuric acid poisoning is bad, 60 to 70% of the cases proving fatal.
	www.1911encyclopedia.org /Sulphuric_Acid (4911 words)

	Sulphuric Acid - MSN Encarta
		In 1740 the acid was produced successfully on a commercial scale by burning sulphur and potassium nitrate in a ladle suspended in a large glass globe partially filled with water.
		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 trioxide is dissolved in concentrated sulphuric acid, and at the same time a regulated influx of water maintains the concentration at a selected level, usually about 95 per cent.
	uk.encarta.msn.com /encyclopedia_761566936/Sulphuric_Acid.html (841 words)

	Method for the purification of sulphuric acid containing mercury - Patent 3932149
		The sulphuric acid containing mercury is in a quantity suitably measured to maintain the concentration between 70 and 80 percent by weight led to the first drying tower.
		Sulphuric acid containing mercury can be obtained from sulpuric acid factories using the method of roasting metallic sulphides, for example, pyrites or zinc blende, and where the roaster gas is insufficiently purified.
		The sulphur trioxide used for absorption was produced by the oxidation of sulphur dioxide in the dried gas of the converter to sulphur trioxide.
	www.freepatentsonline.com /3932149.html (3580 words)

	Modern Mechanix » Learn About SULPHURIC ACID
		It is sulphuric acid, highly versatile and with distinctive properties that have earned for it the title, “King of the Chemicals.” And it is as simple to manufacture commercially as you will find it to be with a few odds and ends of bottles and jars on the kitchen table.
		Concentrated acid is made commercially by the “contact” process in which sulphur dioxide, produced by burning sulphur or roasting iron pyrites, is passed over a heated catalyst, which causes it to combine with oxygen of the air to form sulphur trioxide.
		Since the finely divided sulphur trioxide cannot be dissolved directly in water, it is added to concentrated sulphuric acid, forming a superconcentrated or “fuming” acid which is easily diluted to the required strength.
	blog.modernmechanix.com /2006/08/08/learn-about-sulphuric-acid (864 words)

	ninemsn Encarta - Sulphuric Acid
		In 1740 the acid was produced successfully on a commercial scale by burning sulphur and potassium nitrate in a ladle suspended in a large glass globe partially filled with water.
		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 trioxide is dissolved in concentrated sulphuric acid, and at the same time a regulated influx of water maintains the concentration at a selected level, usually about 95 per cent.
	au.encarta.msn.com /encyclopedia_761566936/Sulphuric_Acid.html (841 words)

	HPA \| Sulphuric Acid \| Background
		Sulphuric acid is clear, colourless or brown oily liquid that is highly corrosive.
		Sulphuric acid is a very important chemical worldwide and over one million tonnes of sulphuric acid are made in the UK each year.
		Sulphuric acid is also used to harvest potatoes; the acid damages the leaves killing the plant and making it easier to lift the potatoes from the ground.
	www.hpa.org.uk /chemicals/compendium/Sulphuric_Acid/background.htm (425 words)

	HPA \| Sulphuric Acid \| FAQs
		Sulphuric acid is a clear, colourless or brown, oily liquid that can be highly corrosive.
		Sulphuric acid is unlikely to cause harm to the unborn child if the mother is exposed.
		Sulphuric acid is not known to damage the unborn child as it does not easily go from the mother to the child.
	www.hpa.org.uk /chemicals/compendium/sulphuric_acid/FAQs.htm (507 words)

	Sulphuric acid
		But in the presence of water vapor or of dilute sulphuric acid, this nitrosylsulphuric acid is at once decomposed, according to reaction (2), sulphuric acid being formed, and nitrous anhydride regenerated; or if sulphur dioxide and oxygen are concerned in the process, then reaction (3) occurs.
		The nitrogen oxides are derived from nitric acid, or by the action of sulphuric acid on sodium nitrate in the nitre pots.
		By the oxidation of pyrites in a suitable furnace, the sulphur is converted to dioxide, and iron oxide remains.
	www.lenntech.com /Chemistry/Sulphuric-acid.htm (1786 words)

	Sulphuric Acid: Recycling (Site not responding. Last check: 2007-10-21)
		Spent sulphuric acid and other sulphate compounds, previously regarded as waste, are an increasingly important source of sulphur dioxide for sulphuric acid manufacture.
		The sulphuric acid may have been used as a catalyst or drying agent, or in the preparation of metal surfaces for plating.
		The remaining gases, which are sulphur dioxide, oxygen, nitrogen and steam, are dried in 98% sulphuric acid, before being reheated and entered into the contact process to make new sulphuric acid.
	www.uyseg.org /greener_industry/pages/sulphuric_acid/8SulphuricAcidRecycling.htm (424 words)

	Use of sulphuric acid
		The Commodity Substance Approval for sulphuric acid is one means by which farmers and farm workers are provided with specific advice on the safe handling and use of this pesticide.
		Sulphuric acid is fast-acting and is quickly neutralised in the environment by reacting with the vegetation canopy (which intercepts much of the chemical), soil and water in the soil.
		Sulphuric acid is known to break down relatively quickly, reducing the possibility of problems with long term effects on the environment.
	www.pesticides.gov.uk /safe_use.asp?id=62 (1295 words)

	Sulphuric Acid Dewpoint Temperature Monitoring in combustion plants
		A portable sulphuric acid dewpoint monitor (Lancom 200) is designed specifically for plant requiring only periodic monitoring of the sulphuric acid dewpoint temperature for boiler efficiency checks, corrosion protection and evaluation of the effectiveness of corrective measures such as fuel additives and changes in the combustion conditions.
		A solution to this issue is to pre-test using a portable sulphuric acid dewpoint monitor (Lancom 200) before and after the air heater, and at the precipitator, to establish the optimum installation point for a continuous sulphuric acid dewpoint monitor (Model 440).
		These are normally defined as sulphuric acid emissions in a vapor or liquid state, since the sulphuric acid absorbed in the fly ash is assumed to be removed by the dust collectors.
	www.landinst.com /combustion/products/combustion/sulphuric_acid_dewpoint.htm (933 words)

	Sulphuric Acid
		Sulphuric acid is the strong acid produced by dissolving sulphur trioxide in water.
		Sulphuric acid is an important industrial chemical and it has many uses as a strong oxidising agent and a powerful dehydrating agent.
		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.
	www.ucc.ie /academic/chem/dolchem/html/comp/h2so4.html (1300 words)

	Sulphuric acid (Site not responding. Last check: 2007-10-21)
		In combination with nitric acid it forms the nitronium ion, which is used in the nitration[?] of compounds.
		Because the hydration of sulfuric acid is thermodynamically favourable, sulphuric acid is an excellent dehydration agent, and is used to prepare many dried fruits.
		Sulfuric acid was known to medieval alchemists under of variety of names including oil of vitriol and spirit of vitriol.
	www.findword.org /su/sulphuric-acid.html (923 words)

	Sulphuric Acid
		Sulphur dioxide, SO, is a dense, colourless gas which is formed when many sulphur compounds are burnt in air.
		Sulphuric acid is normally sold as a 98% mixture with water (18 Molar).
		Sulphuric acid is a strong dibasic acid, which means that both of its two hydrogens can be used to react with other chemicals, liberating the tetrahedral sulphate ion (SO) in the process.
	www.ch.ic.ac.uk /rzepa/mim/environmental/html/sulphuric_text.htm (571 words)

	sulphuric acid concentration system,glass valves,glass vessels,shell heat exchanger,sulphuric acid cncentration ... (Site not responding. Last check: 2007-10-21)
		Commercial sulphuric acid (98% w/w) is a heavy chemical widely used in chemical process industries.
		Commercial sulphuric acid is a cheap commodity and in its dilute and impure form does not have good market potential.
		The present day scenario of such industries generating dilute sulphuric acid is compared with the situation that could be arrived at by installing sulphuric acid concentration system in the adjacent drawing.
	www.shivascientific.com /suphuric_acid_conc.html (347 words)

	Chas. S. Lewis & Co.
		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.
		Sulphuric acid, a heavy, viscous, inorganic liquid, is the single most widely used industrial chemical.
		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)

	Agrium - Sulphuric Acid
		Agrium manufactures sulphuric acid that is used primarily as a raw material in the manufacture of phosphorus fertilizers, although some is also offered for sale.
		Sulphur, air and water are used to produce sulphuric acid.
		The sulphur trioxide gas enters a tower where it is absorbed in wet circulating 98-99% sulphuric acid.
	www.agrium.com /products_services/ingredients_for_growth/sulphur/sulphuric_acid.jsp (158 words)

	sulfuric acid - Encyclopedia.com
		SO is formed at 337°C. Concentrated sulfuric acid is a weak acid (see acids and bases) and a poor electrolyte because relatively little of it is dissociated into ions at room temperature.
		To dilute the acid, the acid should be added slowly to cold water with constant stirring to limit the buildup of heat.
		Dilute sulfuric acid is a strong acid and a good electrolyte; it is highly ionized, much of the heat released in dilution coming from hydration of the hydrogen ions.
	www.encyclopedia.com /doc/1E1-sulfuric.html (1505 words)

	Sulphuric acid dilution & cooling,GIL
		GRAPHITE INDIA Sulphuric Acid Dilution and Cooling Units are mainly used in fertilizer, battery and allied industries for dilution of concentrated acid.
		Sulphuric Acid Dilution and Cooling Unit consists of a mixer, followed by a heat exchanger.
		Mixer is used for diluting concentrated sulphuric acid to the desired concentration and the heat exchanger is used for bringing down the temperature of dilute acid to desired temperature (i.e to remove the heat evolved during dilution of concentrated sulphuric acid).
	www.graphiteindia.com /cooling.htm (174 words)

	Acid Rain
		Acid rain is caused by the release of the gases SO2 (sulphur dioxide) and NOX (nitrous oxides).
		Sulphur dioxide reacts with water vapour and sunlight to form sulphuric acid.
		Acid particles in the air are suspected of contributing to respiratory problems in people.
	www.botany.uwc.ac.za /Envfacts/facts/acidrain.htm (880 words)

	Koppers - Sulphuric Acid
		Koppers Lambson is one of the largest suppliers of bulk Sulphuric Acid in the UK, and pioneered the concept of "Cradle to Grave" management of the material, whereby we work with the customers to minimize the environmental impact of the use of the product.
		Sulphuric Acid is one of the most widely used chemical products throughout the World, and current consumption in the UK is estimated at approximately 1 million tonnes.
		Substantial volumes of Sulphuric Acid are used in the Metal Pickling and the manufacture of Fertilisers, Petrochemicals, Detergents, Polymers, Pharmaceuticals etc.
	www.koppers.com /htm/KLamb_sulphuric_acid.html (264 words)

	C10DEMO5
		The concepts of acid concentration (as expressed by molarity), acid equivalence (as determined by titration), and acid strength (as expressed by pH), are sometimes confused.
		This demonstration uses hydrochloric, sulphuric and acetic acids in equal concentration to demonstrate that their equivalencies and pH are all different.
		Sulphuric acid, HCl and acetic acid are severely corrosive to eyes, skin and other tissue and toxic by ingestion and inhalation.
	educ.queensu.ca /~science/main/concept/chem/c10/c10demo5.htm (450 words)

	Goulding Chemicals - About Us : : About Goulding Chemicals
		Dangerous reactions with nitric acid, hydrochloric acid, formic acid and dilute acids in general with the possible evolution of toxic gas.
		Small acid residues may be diluted with large amounts of water, neutralising with caustics to pH about 7, and flushed to the sewer.
		Dispose of sulphuric acid or materials contaminated with sulphuric acid using a licensed contractor.
	www.gouldings.ie /safety_sds_sulphuric_acid_b.htm (304 words)

	Making Sulphuric Acid
		Due to the irritation caused by sulphuric acid, precautions have to be taken not to release it into the atmosphere.
		Sulphuric acid is a typical acid reacting with metals, metal oxides and hydroxides, metal carbonates and alkalis to make salts.
		Concentrated sulphuric acid is a dehydrating agent, as it has an extreme liking for water.
	dspace.dial.pipex.com /town/parade/rbd41/sa.htm (423 words)

	A Leading Scientific Glass Manufacturing Company in Baroda GujaratIndia Borosilicate Glass, Glassware, Absorption ... (Site not responding. Last check: 2007-10-21)
		Commercial sulfuric acid is a cheap commodity and in its dilute and impure form does not have good market potential.
		The present day scenario of such industries generating dilute sulfuric acid is compared with the situation that could be arrived at by installing sulfuric acid concentration system in the adjacent drawing.
		The process is extremely simple and involves concentration of dilute sulfuric acid by evaporation using steam/thermic fluid as heating media under vacuum.
	www.goelscientific.com /hcl_gas_generator_sulphuric.htm (316 words)

	Sulphuric Acid
		Occupational exposure to strong inorganic acid mists containing sulphuric acid has been associated with an increased incidence of cancer of the larynx (the voice box) and, to a lesser extent, the lung.
		Prolonged or repeated exposures to mists or vapours of sulphuric acid may cause erosion and discolouration of teeth, chronic irritation of the nose, throat and bronchial tubes.
		Sulphuric acid should be disposed of in accordance with local and national legislation.
	www.efma.org /publications/guidance/section17.asp (887 words)

	Falconbridge : Our Business : Related Businesses : Sulphuric Acid
		Sulphuric acid is produced from sulphur dioxide created while smelting copper, nickel, lead and zinc concentrates at Falconbridge's metallurgical facilities (Brunswick, CEZ, Horne, Kidd Creek and Sudbury).
		In the metal smelting process, sulphur dioxide is captured to reduce emissions that contribute to acid rain.
		It is then oxidized by atmospheric air at high temperatures and in the presence of a vanadium pentoxide catalyst to produce sulphuric acid.
	www.falconbridge.com /our_business/related_businesses/sulphuric_acid.htm (243 words)

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