Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Calcium oxide


Related Topics

  
  Calcium - New World Encyclopedia
Calcium carbonate is used in construction materials; calcium oxide is used for treating water, sewage, and acidic soils; and calcium hydroxide is used for processing water for beverages and neutralizing acids in the tanning industry.
Rather, it occurs in the form of various compounds: calcium carbonate in limestone rocks, marble, coral, and the shells of mollusks; calcium magnesium carbonate in the mineral dolomite; calcium sulfate dihydrate in the mineral gypsum; calcium fluoride in the mineral fluorite; and calcium phosphate in the apatite group of minerals.
Calcium hydroxide is also a filler used in the preparation of dry mixes for painting and decorating; manufacturing mixes for pesticides; and manufacturing brake pads.
www.newworldencyclopedia.org /entry/Calcium   (2028 words)

  
  Calcium - LoveToKnow 1911
Calcium oxide or lime has been known from a very remote period, and was for a long time considered to be an elementary or undecomposable earth.
On electrolysis a layer of metallic calcium is formed at the lower end of this rod on the surface of the electrolyte; the rod is gradually raised, the thickness of the layer increases, and ultimately a rod of metallic calcium, forming, as it were, a continuation of the iron cathode, is obtained.
Whereas calcium chloride, bromide, and iodide are deliquescent solids, the fluoride is practically insoluble in water; this is a parallelism to the soluble silver fluoride, and the insoluble chloride, bromide and iodide.
www.1911encyclopedia.org /Calcium   (2052 words)

  
 Chemical of the Week -- Lime
Calcium oxide is a white crystalline solid with a melting point of 2572°C. It is manufactured by heating limestone, coral, sea shells, or chalk, which are mainly CaCO
Calcium carbide is manufactured by heating lime with coke.
Calcium oxide no longer produces the limelight in theaters.
scifun.chem.wisc.edu /chemweek/lime/lime.html   (871 words)

  
 Process for the production of reactive calcium oxide - Patent 3991172
Reactive calcium oxide is produced on an industrial scale by decomposing calcium carbonate having a grain size of less than 200 μm at a temperature of at least 850° C and at a CO --partial pressure of not more than 40% of the CO --equilibrium pressure corresponding to the formation of the reactive calcium oxide.
Since the reactive calcium oxide combines very quickly and tightly with water vapor, it is apparent that the carrier air is to be used in a dry condition.
sintered calcium oxide, sintered magnesium oxide and sintered dolomite or corundum.
www.freepatentsonline.com /3991172.html   (1349 words)

  
 calcium. The Columbia Encyclopedia, Sixth Edition. 2001-05
Calcium is chemically active; it tarnishes rapidly when exposed to air and burns with a bright yellow-red flame when heated, mainly forming the nitride.
Calcium carbide reacts with water to form acetylene gas; it is also used to prepare calcium cyanamide, which is used as a fertilizer.
Calcium also functions in the regulation of the heartbeat and in the conversion of prothrombin to thrombin, a necessary step in the clotting of blood.
www.bartleby.com /65/ca/calcium.html   (489 words)

  
 calcium oxide – FREE calcium oxide Information | Encyclopedia.com: Facts, Pictures, Information!
Calcium oxide is widely used in industry, e.g., in making porcelain and glass; in purifying sugar; in preparing bleaching powder, calcium carbide, and calcium cyanamide; in water softeners; and in mortars and cements.
Calcium oxide is a basic anhydride, reacting with water to form calcium hydroxide ; during the reaction (slaking) much heat is given off and the solid nearly doubles its volume.
Calcium apparently facilitates ferric (hydro)oxide floc aggregation, increasing...
www.encyclopedia.com /doc/1E1-calciumo.html   (1426 words)

  
 Calcium oxide - Information from Reference.com
Calcium oxide is a basic anhydride, reacting with water to form calcium hydroxide; during the reaction (slaking) much heat is given off and the solid nearly doubles its volume.
Calcium oxide (CaO), commonly known as burnt lime, caustic lime, lime or quicklime, is a widely used chemical compound.
Calcium oxide is usually made by the thermal decomposition of materials, such as limestone, that contain calcium carbonate (CaCO
www.reference.com /search?q=Calcium+oxide   (628 words)

  
 Common Liming Terms
Calcium is an essential part of teeth, bone and shells.
Calcium oxide does not occur in nature, it is the formed from calcium carbonate by heating limestone to drive off the carbon dioxide.
It supplies calcium to the soil, but it is a neutral substance and does not correct soil acidity; therefore it is not a liming material.
www.spectrumanalytic.com /support/library/ff/Common_Liming_Terms.htm   (1377 words)

  
 American Elements: Calcium Oxide Supplier & Tech Info
However, certain perovskite structured oxides are electronically conductive finding application in the cathode of solid oxide fuel cells and oxygen generation systems.
Calcium Oxide is also available in pellets, pieces, powder, sputtering targets, tablets, and nanopowder (from American Elements' nanoscale production facilities).
The biocompatibility of nanostructured calcium phosphate coated on micro-arc oxidized titanium.
www.americanelements.com /caox.html   (490 words)

  
 Calcium carbonate Summary
Calcium carbonate is widely used as an extender in paints, in particular matte emulsion paint where typically 30% by weight of the paint is either chalk or marble.
Fine ground calcium carbonate is an essential ingredient in the microporous film used in babies nappies and some building films as the pores are nucleated around the calcium carbonate particles during the manufacture of the film by biaxial stretching.
Calcium carbonate is known as whiting in ceramics/glazing applications, where it is used as a common ingredient for many glazes in its white powdered form.
www.bookrags.com /Calcium_carbonate   (1509 words)

  
 Search: What Is Calcium Oxide Used for
Calcium oxide is a white crystalline solid with a melting point of 2572°C. It...
calcium are calcium oxide, calcium hydroxide, calcium chloride, calcium sulfate...
Calcium oxide is widely used in industry, e.g., in making porcelain and glass; in purifying sugar; in preparing bleaching powder, calcium carbide, and calcium cyanamide; in water softeners...
www.classifieds2000.com /webmkt.cls2k/search/web/What%2BIs%2BCalcium%2BOxide%2BUsed%2Bfor/-/-/1/-/-/-/1/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/302349/right   (225 words)

  
 FDA itg Page 1
Calcium oxide or "Quicklime" is produced by roasting calcium carbonate (limestone) in kilns, utilizing a direct flame method, until all of the carbon dioxide is driven off.
In this case, the calcium oxide producer had been unable to obtain sufficient quantities of natural gas, the normal fuel, and was forced to use #2 diesel fuel.
Calcium oxide and calcium hydroxide, which is produced by the action of water on calcium oxide, have a broad range of uses in the food industry which include the following:
www.fda.gov /ora/inspect_ref/itg/itg17.html   (555 words)

  
 Calcium   (Site not responding. Last check: )
Calcium is silvery in appearance, but when exposed to the air it quickly develops a white coating of magnesium oxide.
In nature calcium it is often found dissolved in water and is one ion responsible for the "hardness" of water.
Calcium sulfate, carbonate, chromate, and oxalate are all insoluble compounds.
www.uncp.edu /home/mcclurem/ptable/ca.htm   (311 words)

  
 Calcium (Ca) - Chemical properties, Health and Environmental effects
Calcium hypochlorite (whitening powder) is produced in the industry when passing chlorine through a lime solution, and has been used as a whitening agent and as water purifier.
Calcium is the most abundand metal in the human body: is the main constituent of bones and theets and it has keys metabolic functions.
Calcium should be taken together with magnesium in a 2:1 rate, that is to say, if you ingest 1000 mg of calcium, you should also ingest 500 mg of magnesium.
www.lenntech.com /Periodic-chart-elements/Ca-en.htm   (1343 words)

  
 Cheney Lime & Cement Company
The highest solubility of lime (calcium hydroxide) occurs at 0 degrees C (freezing) and the lowest is at 100 degrees C (boiling).
When the 56 tons of calcium oxide are reacted with 18 tons of water, the hydrated lime produced (calcium hydroxide) would ideally have a weight of 74 tons.
It was formed from the reaction of quicklime (calcium oxide) and water, and begins to decompose at 1076 degrees F (580 degrees C) returning to the original reactants; quicklime and water (as water vapor).
www.cheneylime.com /limefact.htm   (2466 words)

  
 Calcium Oxide
Like other calcium compounds, calcium oxide is used for many construction purposes, as in the manufacture of bricks, mortar, plaster, and stucco.
Among the many other applications of calcium oxide are its uses in the production of pulp and paper, in the removal of hair from animal hides, in clarifying cane and beet sugar, in poultry feeds, and as a drilling fluid.
Calcium Oxide is a typical basic oxide (turns litmus paper blue) and it is formed by heating calcium carbonate.
science.jrank.org /pages/1122/Calcium-Oxide.html   (438 words)

  
 Part V - Soil Acidity and Liming
Ground limestone is heated in a kiln to drive off CO This leaves a highly concentrated calcium oxide or calcium and magnesium oxide.
Pure calcium hydroxide has a molecular weight of 74 so it is 1.35 times more reactive (135% CCE) than pure calcium carbonate and may be almost twice as effective, pound for pound, at neutralizing soil acidity compared to ground limestone.
It is a granular or loosely consolidated earthy material comprised largely of shell fragments and calcium carbonate precipitated in ponds.
hubcap.clemson.edu /~blpprt/acid5.html   (1516 words)

  
 CALCIUM
Calcium even contributes to the pearls that are used to make rings and necklaces.
The cloudiness in the water is caused by particles of calcium hydroxide.
Magnesium is a silvery metal, not unlike calcium but easier to extract from its ore. It is the most reactive of the metals that can be used in everyday applications (calcium, sodium and potassium are too difficult to produce and are unstable in air, water or both).
www.atlanticeurope.com /Elements/Calcium.html   (1563 words)

  
 Calcium oxide
Calcium oxide (CaO), commonly known as lime, quicklime or burnt lime, is a widely used chemical compound.
Calcium oxide is usually made by the thermal decomposition of materials, such as limestone, that contain calcium carbonate (CaCO
This is accomplished by heating the material to around 900°C (American Scientist), a process called calcination or lime-burning, so as to remove the carbon dioxide in a non-reversible chemical reaction.
www.marble.com /countertops/encyclopedia/16/calcium,oxide.html   (317 words)

  
 American Elements: Calcium Oxide Sputtering Target Supplier & Tech Info
Calcium is a Block S, Group 2, Period 4 element.
The calcium atom has a radius of 197.4.pm and it's Van der Waals radius is 200.pm.
Calcium is a member of the alkaline earth elements.
www.americanelements.com /caoxst.html   (634 words)

  
 Lime (mineral) Summary
In its pure form, calcium oxide occurs as white crystals, white or gray lumps, or a white granular powder.
Like other calcium compounds, calcium oxide is used for many construction purposes, as in the manufacture of bricks, mortar, plaster, and stucco.
Lime is a general term for various naturally occurring minerals and materials derived from them in which carbonates, oxides and hydroxides of calcium predominate.
www.bookrags.com /Lime_%28mineral%29   (722 words)

  
 The Citizen Scientist
Calcium oxide is commonly known as quicklime, burnt lime, unslaked lime, or sometimes just lime.
Calcium carbonate decomposes at 825° C to yield carbon dioxide and calcium oxide.
Since calcium oxide has such a strong affinity for atmospheric moisture, it can be used as a desiccant (calcium chloride is preferable for this, however).
www.sas.org /tcs/weeklyIssues_2005/2005-08-26/feature1/index.html   (2066 words)

  
 Toxicologic Review of Selected Chemicals - 223
This revised limit was consistent with the ACGIH TLV for calcium oxide, which was set on the basis of analogy with sodium hydroxide, a widely recognized sensory irritant.
       Calcium oxide (lime) is produced when limestone is calcined to drive off carbon dioxide.
Calcium oxide is used as a refractory material; as a flux in steelmaking; as a binding agent in building, pulp and paper manufacture, sugar refining, and leather tanning; as the raw material for chlorinated lime bleaching powder, and as a soil treatment in agriculture (Encyclopedia of Occupational Health and Safety, Vol.
www.cdc.gov /niosh/pel88/1305-78.html   (550 words)

  
 WebElements Periodic Table of the Elements | Calcium | chemical reaction data
The surface of calcium metal is covered with a thin layer of oxide that helps protect the metal from attack by air, but to a lesser extent than the corresponding layer in magnesium.
Once ignited, calcium metal burns in air to give a mixture of white calcium oxide, CaO, and calcium nitride, Ca Calcium oxide is more normally made by heating calcium carbonate.
The calcium metal sinks in water and after an hour or so bubbles of hydrogen are evident, stuck to the surface of the metal.
www.webelements.com /calcium/chemistry.html   (461 words)

  
 CALCIUM OXIDE
Calcium oxide is used in oil refining, petrochemical (manufacturing of additives and lubricants), chemical, leather, and other branches of industry.
Calcium oxide is packed into big bags or four-ply laminated or bitumen-impregnated bags up to 40 kg.
It is transported by any mode of transport protected from ingress of moisture.
www.soda.ru /en/indexpro.php?razd=prod/himprod&pg=page9.htm   (97 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.