Carbon calcium sulfate

Graded Adsorbents and Solvents. Materials used in columns for adsorption chromatography are grouped in Table 12 in an approximate order of effectiveness. Other adsorbents sometimes used include barium carbonate, calcium sulfate, calcium phosphate, charcoal (usually mixed with Kieselguhr or other form of diatomaceous earth, for example, the filter aid Celite) and cellulose. The alumina can be prepared in several grades of activity (see below). 

Fillers (calcium carbonate, calcium sulfate, aluminum oxide, bentonites, wood flour) increase the solid content of the dispersion. They are added up to 50%, based on PVAc. The purpose of the addition is the reduction of the penetration depth, provision of thixotropic behavior of the adhesive, gap filling properties and the reduction of the costs. Disadvantage can be the increase of the white point and a possible higher tool wear. 

Scale Prevention. The scale normally formed on heat transfer surfaces of sea water evaporators consists of calcium carbonate, magnesium hydroxide, and/or calcium sulfate. The first two form as a result of the breakdown of bicarbonate in sea water, which is initially saturated with calcium carbonate. Calcium sulfate scale forms purely as a result of its inverted solubility curve. Sea water is not saturated with calcium sulfate and an economically reasonable amount of fresh water can be recovered from sea water without exceeding saturation with calcium sulfate. However, at the start of this investigation, the solubility of calcium sulfate in sea water was not accurately enough known to tell whether 30, 50, or 80% of the water content could be removed at various temperatures without encountering calcium sulfate scale. 

N-Methyl-p-nitroaniline Nickel Raney Palladium on carbon Calcium sulfate... 

X-ray Diffraction Analysis. The inorganic components of paper are the most suitable ones for quantitative X-ray diffraction analysis. Most of these compounds are minerals and are present as fillers, coatings and pigments (often whiteners) which are added to improve the properties of the paper. Examples of compounds commonly added to paper are alumina, aluminum silicate, barium sulfate, calcium carbonate, calcium sulfate, calcium sul-foaluminate, iron oxide, magnesium silicate, silica, titanium dioxide, zinc oxide, and zinc sulfide (28). Some of these, e.g., calcium carbonate and titanium dioxide, may be present in any of... 

Fig. 23. Visualization of membrane fouling by scanning electron microscopy (A) inorganic fouling dne to calcinm carbonate, calcium sulfate, silica, iron, barium and strontium sulfate (35,000x) (B) organic fonling dne to humic acid (35,000x) (C) flow channels in membrane fouled with biological growth.

Typical fillers calcium carbonate, calcium sulfate, silica, organic fibers, graphite, mica, bentonites, sand, aluminum hydroxide, sepiolite, rubber particles... 

Calcium carbonate, calcium sulfate, kaolin, talc, magnesium carbonate, and zinc oxide are frequently used as nutrient supplements or food diluents. Calcium silicate and fumed silica are used as anticaking agents. They are added in concen-... 

Acetal copolymer Calcium carbonate Calcium sulfate dihydrate Petroleum distillates, hydrotreated light Polyaluminum chloride Polycarbonate Styrene-ethylene/butylene-styrene block copolymer Styrene/isoprene/styrene block copolymer food-contact articles... 

Mineral fillers include aluminum trihydrate, calcium carbonate, calcium sulfate, feldspar, Kaolin, mica, silica, talc, titanium dioxide, and wollastonite. These improve properties such as flame resistance, impact strength, and color. Table F.3 shows the major resin markets for selected mineral fdlers/reinforcements. 

Where sparingly soluble salts such es calcium carbonate, calcium sulfate, and calcium oxalate are present, they are essentially contaminants that can form scale deposits. The supersaturation potential is caused by both concentration and temperature effects. The inverse solubility characteristic acts to fevor deposition on the heat transfer surface. The contaminant may also be produced by a corrosion effect. 

A plethora of different nanosized particles have been adopted for biomedical and pharmaceutical applications, including inorganic and organic nanoparticles (NPs). The most commonly adopted inorganic NPs include magnetic particles (mainly for imaging), silica particles, metal oxides, carbides, borates, sulfides, hydroxides, and salts (eg, calcium phosphate, calcium carbonate, calcium sulfate). Organic NPs include oil-in-water (0/W) emulsions, double emulsions [water-in-oil-in-water (W/OAV)], and polymer-based NPs. Different polymer-based nanosystems are adopted and include polymer micelles, dendrimers, polymerosomes, and polymeric NPs. 

In recent years, there has been a breakthrough in the manufacturing cost of potassium titanate whiskers, aluminum borate whiskers, and so forth. Meanwhile, inexpensive and high-quality inorganic whiskers such as calcium carbonate, calcium sulfate, and magnesium are successfully synthesized, which makes inorganic whiskers a new type of filling modification material of polymer materials. This field has become a research hotspot all over the world and reveals broad application and market prospects. 

The saturation levels for common cooling-water scales were calculated, including calcium carbonate, calcium sulfate, amorphous silica, and magnesium hydroxide. Brudte saturation levels were included because of the potential for magnesium silicate formation as a result of the adsorption of silica upon precipitating magnesium hydroxide. Three categories of systems were encountered [24] ... 

Field (1835) classed various pigments such as calcium carbonate, calcium sulfate, white clay, (egg)shell white and bone white qq.v.) as Terrene whites. Salter (1869) elaborates on this, stating that these are available under equivocal names, among which are Moral or Modan white, Spanish white, Troys or Troy white, Rouen white, China white, and Satin white . 

Calcium Carbonate — 117 47 — E E E calcium carbonate, calcium sulfate, calcium sulfite, ail suspended as 6-11% (by wt.) slurry. pH not specified, aeration... 

Silver carbonate/calcium sulfate Ag2C0 /CaS04... 

If an adhesive contains a large amount of fillers (such as calcium carbonate, calcium sulfate, sand that are dense) its specific gravity will be high, probably higher than 1.2 or 1.3, and consequently the consumption will be higher. Manufacturers TDS should always indicate the density of A and S. 

Deposition of inorganic scale may occur during well production. Depending on well conditions and produced water characteristics, different scale types may form. Often, scale formation is associated with a breakthrough of water production. Common scales include calcium carbonate, iron carbonate, calcium sulfate, barium sulfate, strontium sulfate, andiron sulfide. Combinations may also form. Figures 3-2 and 3-3 show well samples of calcium carbonate and iron scale, respectively. 

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