Calcium sulfate CaSO

Other major components found in the subsurface include significant quantities of relatively high surface area, soluble calcium carbonate (CaCOj), and calcium sulfate (CaSO ). It is difficult to estimate the contribution of amorphous materials... [Pg.13]

The decrease in molar volume during calcination of CaC03 to CaO has the effect of increasing the porosity of the sorbent which is important to the efficient utilization of limestone. The gas-solid reaction between S02 and limestone sorbent consists of a number of steps (2.) diffusion of gaseous S02 through the pores of the calcined limestone, reaction of 02 with CaO to form calcium sulfate (CaSO,), and diffusion of S02 through the calcium sulfate product layer to react with additional CaO in the particle. Unfortunately, the sulfation reaction ... [Pg.106]

An interesting case in mineral equilibria is the presence in a soil-water system of two minerals with a common ion. An example of such a case is barium sulfate (BaS04) plus calcium sulfate (CaSO. Which mineral would be controlling SOj- in the system Two conditions would need to be met in such a system one is mass-balance while the second is charge balance. The mass-balance is given by... [Pg.75]

A reaction requires pure anhydrous calcium sulfate, CaS04. Only an unidentified hydrate of calcium sulfate, CaSO XH2O, is available. [Pg.79]

Calcium sulfate CaSO -49.7 Copper(II) sulfate pentahydrate CuS0. 5H,0 +1460... [Pg.768]

Figure 289 describes how two odorless bodies placed in contact produce a very sharp odor and two other bodies form by their reunion a visible, palpable body. At the top left, we see sulfuric acid join with the components of limestone (CaCOj), which are lime (CaO) and carbon dioxide (CO2) liberated by addition of heat ( caloric ). Calcium sulfate (CaSO ) and water remain in the top retort while carbon dioxide and caloric travel to the bottom-most flask. In the middle left, we add lime (CaO) and caloric to ammonium chloride (NH Cl), which... [Pg.483]

The alkaline earth metals are not as soluble as the alkali metals because of higher lattice energies associated with the cation. For example, potassium sulfate (K2SO,) is soluble in water, but calcium sulfate (CaSO,) is not. [Pg.177]

Gypsum wallboard. Gypsum is hydrated calcium sulfate. CaSO., 2 H O. [Pg.100]

An ionic compound composed of a cation and the anion from an acid is often referred to as a salt. Table salt, NaCl, contains the anion from hydrochloric acid. Calcium sulfate, CaSO, is a salt containing an anion from sulfuric acid. Some salts contain anions in which one or more hydrogen atoms from the acid are retained. Such anions are named by adding the word hydrogen or the prefix bi- to the anion name. The best known such anion comes from carbonic acid. [Pg.219]

An important gas-solid reaction for wHich porosity decreases with time of exposure to the reactant gas is the absorption of SO2 by calcined limestone (CaO) or dolomite (CaO/MgO) to produce calcium sulfate (CaSO or CaSO./MgO), which has a larger molar volume than the reactant solid. If diffusional limitations in the pores are important, the porosity decrease will be greater near the surface of the solid particle and pores will plug, limiting access to part of the reactant solid. [Pg.225]

The most common sulfate compounds are SrSO, BaSO, and PbSO, which are all white solids. Minerals that contain these compounds include celestite (SrSO ), barite (BaSO ), and anglesite (PbSO ). Minerals that contain calcium sulfate (CaSO ) are relatively common, and... [Pg.83]

Barium hydroxide Ba(OH), 8HjO 2.55 10 Calcium sulfate CaSO 4.93 10- ... [Pg.1209]

Barium fluoride BaFj 1.84 10-" Calcium sulfate CaSO 4.93- 10-3... [Pg.1079]

The most common oil field scales are calcium carbonate, or calcite (CaCOj) calcium sulfate (CaSO and barium sulfate, or barite (BaSO. Calcite is the most common and the most easily treatable. Calcium sulfate scale is usually present in the... [Pg.189]

Other scales, such as calcium sulfate (CaSO and barium sulfate (BaSO ) are only slightly soluble in acid. Both are soluble in complexing agents such as EDTA and other carboxylic acid-type chelating agents. Barite can be very hard and thus chemically impenetrable, or it can be fine and soft, thereby enabling mechanical removal or partial chemical removal. Barite sometimes occurs in mixed-scale deposits, wherein an acid-soluble portion (e.g., calcium carbonate) can be removed, along with subsequent physical removal of the barite portion. [Pg.190]

Another example looks at the reaction between calcium acetate, CafCHjCOO), and iron sulfate, FeSO. The exchange reaction between calcium acetate and iron(lI) sulfate results in the formation of calcium sulfate, CaSO, and iron(ll) acetate, Fe(CH3COO)2. According to the solubility rules, calcium sulfate is an exception and is insoluble. Iron(n) acetate is soluble. So the molecular equation can be written as... [Pg.126]

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