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Limestones

The quantitative information contained in this equation can be sununarized as follows  [Pg.195]

1 Ca atom (atomic mass 40.1) 1 C atom (atomic mass 12.0) [Pg.195]

From the quantities above, it can be seen that the equation can be viewed in terms as small as the smallest number of molecules and formula units. In this case, that involves simply 1 formula unit of CaCOg (s), 1 formula unit of CaO is), and 1 molecule of CO2. This would involve a total of 1 Ca atom, 1 C atom, and 3 O atoms. From such a small scale, it is possible to expand to moles by scaling up by 6.022 X 10 (Avogadro s number), giving 100.1 g of CaCOg, 56.Ig of CaO, and 44.0 g of CO2. Actually, these quantitative relationships are applicable to any amount of matter, and they enable the calculation of the amounts of material reacting and produced in a chemical reaction. Next, it is shown how these kinds of calculations are performed. [Pg.195]


Desulfurize the flue gas. A whole range of processes have been developed to remove SO, from flue gases, such as injection of limestone into the furnace, absorption into wet limestone after the furnace, absorption into aqueous potassium sulfite after the furnace, and many others.However, the byproducts from many of these desulfurization processes cause major disposal problems. [Pg.306]

Cements are commonly made by heating a mixture of limestone and clay to about 1700 C. The product is ground with gypsum. Chemically cements consist of a mixture of calcium silicates and aluminates with some sulphate present. World production 1976 730 megatonnes. [Pg.87]

An additive assisting in fusion - e.g. CaCOj in iron-smelting - although the limestone also helps with slag formation. [Pg.179]

There are, however, technological means available to burn incompletely desulfurized fuels at the same time minimizing SO2 emissions. In the auto-desulfurizing AUDE boiler developed by IFF, the effluent is treated in place by an absorbent based on lime and limestone calcium sulfate is obtained. This system enables a gas desulfurization of 80% it requires nevertheless a relatively large amount of solid material, on the order of 200 kg per ton of fuel. [Pg.256]

A karst structure . e. a limestone formation which has been eroded resulting in a large scale, open system comparable to a cave... [Pg.59]

For example, the many deepwater fields located in the Gulf of Mexico are of Tertiary age and are comprised of complex sand bodies which were deposited in a deepwater turbidite sequence. The BP Prudhoe Bay sandstone reservoir in Alaska is of Triassic/ Cretaceous age and was deposited by a large shallow water fluvial-alluvial fan delta system. The Saudi Arabian Ghawar limestone reservoir is of Jurassic age and was deposited in a warm, shallow marine sea. Although these reservoirs were deposited in very different depositional environments they all contain producible accumulations of hydrocarbons, though the fraction of recoverable oil varies. In fact, these three fields are some of the largest in the world, containing over 12 billion barrels of oil each ... [Pg.79]

Rainwater for instance will pick up atmospheric COg and react with calcium carbonate (limestone) to form a soluble substance, calcium bicarbonate. This reaction gives water its natural hardness . [Pg.88]

The alkali metals of Group I are found chiefly as the chlorides (in the earth s crust and in sea water), and also as sulphates and carbonates. Lithium occurs as the aluminatesilicate minerals, spodimene and lepidolite. Of the Group II metals (beryllium to barium) beryllium, the rarest, occurs as the aluminatesilicate, beryl-magnesium is found as the carbonate and (with calcium) as the double carbonate dolomite-, calcium, strontium and barium all occur as carbonates, calcium carbonate being very plentiful as limestone. [Pg.122]

Some carbonates are important industrial chemicals. Calcium carbonate occurs naturally in several forms, including limestone, and is used in the production of quicklime, calcium oxide CaO, slaked (or hydrated) lime, calcium hydroxide Ca(OH)2 and cement. [Pg.133]

Any lead(II) sulphate formed in this process is converted to lead(II) silicate by reaction with the quartz. The oxide produced is then mixed with limestone and coke and heated in a blast furnace. The following reactions occur ... [Pg.167]

The last equation explains the funetion of the limestone. An older process, in which the ore was partially roasted, the air shut off and the temperature raised so that excess sulphide reacted with the oxide produced to give lead, is now obsolete. [Pg.168]

In America, the sulphur deposits (mostly in Louisiana and Texas) are dome-shaped layers about 30 cm thick, between limestone above and anhydrite below. From these, the sulphur is extracted by the Frasch process. A metal tube, about 15 cm diameter and containing two concentric inner tubes (Figure 10.1) is sunk into the top of the deposit. Water, superheated to 450 K, is forced... [Pg.261]

The process of extraction requires first smelting (to obtain the crude metal) and then refining. In smelting, iron ore (usually an oxide) is mixed with coke and limestone and heated, and hot air (often enriched with oxygen) is blown in from beneath (in a blast furnace). At the lower, hotter part of the furnace, carbon monoxide is produced and this is the essential reducing agent. The reduction reactions occurring may be represented for simplicity as ... [Pg.391]

Reaction (13.4) is exothermic and reversible, and begins at about 700 K by Le Chatelier s Principle, more iron is produced higher up the furnace (cooler) than below (hotter). In the hotter region (around 900 K), reaction (13.5) occurs irreversibly, and the iron(II) oxide formed is reduced by the coke [reaction (13.6)] further down. The limestone forms calcium oxide which fuses with earthy material in the ore to give a slag of calcium silicate this floats on the molten iron (which falls to the bottom of the furnace) and can bo run off at intervals. The iron is run off and solidified as pigs —boat-shaped pieces about 40 cm long. [Pg.391]

In combination, carbon is found as carbon dioxide in the atmosphere of the earth and dissolved in all natural waters. It is a component of great rock masses in the form of carbonates of calcium (limestone), magnesium, and iron. Coal, petroleum, and natural gas are chiefly hydrocarbons. [Pg.16]

Calcium is a metallic element, fifth in abundance in the earth s crust, of which if forms more than 3%. It is an essential constituent of leaves, bones, teeth, and shells. Never found in nature uncombined, it occurs abundantly as limestone, gypsum, and fluorite. Apatite is the fluorophosphate or chlorophosphate of calcium. [Pg.47]

Its natural and prepared compounds are widely used. Quicklime (CaO), which is made by heating limestone that is changed into slaked lime by carefully adding water, is the great base of chemical refinery with countless uses. [Pg.48]

Mixed with sand it hardens as mortar and plaster by taking up carbon dioxide from the air. Calcium from limestone is an important element in Portland cement. [Pg.48]

Acetylene was discovered m 1836 by Edmund Davy and characterized by the French chemist P E M Berthelot m 1862 It did not command much attention until its large scale preparation from calcium carbide m the last decade of the nineteenth century stim ulated interest m industrial applications In the first stage of that synthesis limestone and coke a material rich m elemental carbon obtained from coal are heated m an electric furnace to form calcium carbide... [Pg.363]

Chichilo reports the following data for the determination of the %w/w A1 in two samples of limestone. ... [Pg.703]

In a similar vein, mean seawater temperatures can be estimated from the ratio of 0 to 0 in limestone. The latter rock is composed of calcium carbonate, laid down from shells of countless small sea creatures as they die and fall to the bottom of the ocean. The ratio of the oxygen isotopes locked up as carbon dioxide varies with the temperature of sea water. Any organisms building shells will fix the ratio in the calcium carbonate of their shells. As the limestone deposits form, the layers represent a chronological description of the mean sea temperature. To assess mean sea temperatures from thousands or millions of years ago, it is necessary only to measure accurately the ratio and use a precalibrated graph that relates temperatures to isotope ratios in sea water. [Pg.351]

Calcia [1305-78-8] Calci-Bind Calcimar Calcimycin [52665-69-7] Calcination Calcined gypsum Calcined limestone... [Pg.149]


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Abundance of limestone

Additives limestone

Agricultural limestone

Albeian condensed Glauconitic Limestone

Algal limestone

Alkalinity concentrations, limestone

Amorphous limestone

Annual revenue requirements conventional limestone

Anoxic limestone drains

Arenaceous limestone

Argillaceous limestone

Asphaltic limestone

Bituminous limestone

Bleed stream oxidation, limestone

Brecciated limestone

Buchan Caves Limestone

Buda Limestone

Buda freshwater limestone (

Calcination fine limestone

Calcination of Finely Divided Limestones

Calcination of limestone

Calcitic limestone

Calcium carbonate limestone

Calcium carbonate limestone caves

Calcium carbonate—See Limestone

Calcium in limestone

Calcium limestone (CaCO

Calcium sulfate, conversion limestone

Carbon dioxide release from limestone

Carbonaceous limestone

Carbonates in limestone

Carboniferous limestone

Charging of limestone

Chemical-grade limestone

Cherty limestone

Classification of Limestones

Clayey limestones

Comminuted limestone

Compact limestone

Concentration profile limestone particle

Concrete with limestone

Cretaceous limestone

Crystalline limestone

Desalination limestone

Diameter limestone

Dissolution difference between limestones

Dolomite additives, limestone

Dolomite/limestone

Dolomitic limestone

Dolomitization of a limestone

Dual alkali system, limestone

Dunaalmas freshwater limestone

Earthy limestone

Economic limestone scrubbing

Edwards limestone

Effect enhanced lime/limestone

Effect enhanced limestone

Ferruginous limestone

Formation of Limestone

Fossiliferous limestone

Fredonia limestone

Freshwater limestone

Glauconitic limestone

Glen Rose limestone

HALLCARB®, limestone

High-calcium limestone

Hydraulic limestone

Importance of lime and limestone

Impurities limestone

Indiana limestone

Jurassic limestone

Key Largo Limestone, Florida

Leadville Limestone

Lime and limestone wet

Lime-limestone process

Lime/limestone

Lime/limestone additives

Lime/limestone adipic acid-enhanced

Lime/limestone scrubber slurry

Limestone (CaCO

Limestone Deposit Removers - Acidic Household Cleaners

Limestone Dissociation (Calcination)

Limestone NAPAP study

Limestone Niagara

Limestone Photos

Limestone Pipelines

Limestone Springfield

Limestone Weathering in an Urban

Limestone [CAS

Limestone absorption

Limestone acid reactions

Limestone acid-enhanced

Limestone adipic acid-enhanced

Limestone advantages

Limestone aggregates

Limestone alteration

Limestone analysis

Limestone and Lime

Limestone apparatus

Limestone aquifer

Limestone areas

Limestone asphaltic concrete

Limestone attrition

Limestone average composition

Limestone bedded

Limestone burning

Limestone calcinating

Limestone calcination

Limestone calcination kilns

Limestone calcination pore size distribution

Limestone calcination porosity

Limestone calcination structural variations

Limestone carbon content

Limestone carbon isotopes

Limestone carbonate

Limestone cave formation

Limestone caverns

Limestone caves

Limestone cement

Limestone combustor

Limestone composition

Limestone decomposition

Limestone degradation

Limestone demand

Limestone dimensions

Limestone dissolution

Limestone drains

Limestone dual alkali

Limestone dual alkali process

Limestone economic considerations

Limestone economics

Limestone emissions

Limestone experimental results

Limestone fillers

Limestone forced oxidation

Limestone formations

Limestone importance

Limestone industry

Limestone lakes

Limestone long-term test

Limestone magnesium content

Limestone market

Limestone mass transfer model

Limestone matrix

Limestone neutralization

Limestone operability

Limestone outcrops

Limestone oxidation

Limestone oxidation factor

Limestone pearls

Limestone powder

Limestone power consumption

Limestone procedure

Limestone process

Limestone process annual revenue requirements, conventional

Limestone process, capital investment

Limestone processes, equilibria

Limestone quality

Limestone rain stripping

Limestone reaction

Limestone reactivity

Limestone recession

Limestone removal

Limestone reservoir

Limestone retention time

Limestone rocks

Limestone runoff

Limestone samples, compositions

Limestone scrubber

Limestone scrubbing

Limestone scrubbing, high sulfur coal

Limestone sensitivity

Limestone separation from quartz

Limestone silane

Limestone slurry

Limestone soils

Limestone solubility

Limestone spray tower

Limestone stir rate

Limestone study

Limestone surface

Limestone technology

Limestone test programs

Limestone test results

Limestone testing with forced oxidation

Limestone tests with bleed stream

Limestone thermal decomposition

Limestone transportation

Limestone uranium

Limestone uses for

Limestone utilization

Limestone weathering

Limestone wet scrubber

Limestone wet scrubbing

Limestone with acids, reaction rates

Limestone, Ground

Limestone, absorption calcined

Limestone, applications

Limestone, calcium-41 dating

Limestone, particle size distribution

Limestone, sulfur dioxide sorbent

Limestone, sulfuric acid deterioration

Limestone-associated clays

Limestone-modified Portland cement

Limestone/Lime injection process

Limestones and Dolomites

Limestones classification

Limestones development

Limestones solution rates

Limestones, uranium deposits

Lincolnshire Limestone

Lincolnshire Limestone aquifer

Madison limestone

Madison limestone, Montana

Magnesian limestone

Magnesium limestone

Magnesium limestone dissolution

Magnesium limestone sulfation

Metallurgical-grade limestone

Metamorphic limestone

Metasomatic limestone

Murrindal Limestone

Natural calcium carbonate Limestone

Neutralizing limestone

Newman Limestone, Kentucky

Nodules in limestones

Occurrence of Limestones

Oolitic limestone

Ooze-chalk-limestone transition

Origins of limestone

Other Uses of Limestone

Paving limestone sand

Phosphatic limestone

Physical and Chemical Properties of Limestone

Porosity, limestone

Portland limestone cement

Powdered limestone

Processing and Dispatch of Limestone

Raw Materials for Lime Burning (Limestone, Fuel and Refractories)

Reactions of acid with limestone and

Reactions of acid with limestone and dolomite

Reef limestones

Salem limestone

Sampling and Testing of Limestone

Scrubbing lime/limestone

Scrubbing process, limestone, capital

Sedimentary limestone

Shackleton Limestone

Shatsky Rise limestones

Shell limestones

Shelly limestone

Siliceous limestone

Silurian limestone

Slurry lime/limestone

Solids analysis, limestone

Specifications, limestone

Sulfur continued limestone

Sulfur dioxide-limestone reaction

Temperature limestone particle

Texas Cream limestone

The Use of Limestone in Agriculture

Todilto Limestone

Unconsolidated limestone

Use of Limestone in Cement Production

Waste treatment with limestone

Why do steps made of limestone sometimes feel slippery

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