Ceramic beads

Cation and anion contaminant reduction. This technology uses a mixed-bed of acrylic and ceramic beads, with potassium chloride as a regenerant. 

Where multiple functions are required, units contain double or triple media beds employing, for example, acrylic beads, ceramic beads, and catalysts. Water Wizard, Inc. offers a multifunctional unit triple bed under the name TRION-3 . ... 

Three longitudional strings of ceramic beads held against the heated rod over the full length by wires. 

Immobilization by chemical bonding gives strong, irreversible attachments to a solid support. The bonds are normally covalent but they can be electrostatic. Typical supports are functionalized glass and ceramic beads and fibers. Enzymes are sometimes cross-linked to form a gel. Occasionally, enz5anes can be flocculated while retaining catalytic activity. 

The heat transfer medium of the exchanger consisted of 1.6 mm (1/16") diameter, type A, 90% aluminum oxide ceramic beads (Coors Ceramic Co., Golden City, CO) with a specific gravity of 3.6 g/cm. Selected roasting conditions were maintained by control of bead temperature and resident time. The beads were heated to 240°C and were maintained in the chamber with the raw beans for 100 seconds in a 1 5 ratio of beans to beads. These processing conditions resulted in an exit temperature of the beans of 113°C. Roasted beans were cracked through a corrugated roller mill (Ferrell... 

The nitrogen-phosphorus detector (NPD) is, as the name implies, preferentially sensitive to nitrogen and phosphorus atoms. The detector contains a ceramic bead formed with an alkali salt, such as rubidium or cesium. The bead is heated in the presence of hydrogen, but the flow of gas is limited so that no flame is present. As the column effluent passes around the bead, nitrogen- and phosphorus-containing compounds produce electronegative moieties, which are treated as an increase in current and recorded as peaks (Carlsson et al., 2001). 

The chemical reactions by which these pollutants are converted to harmless emissions take place as exhaust gases pass through two chambers. Each chamber contains a catalyst that has been deposited on large numbers of very small ceramic beads or on the surfaces of a honeycomb-shaped hlter. In the hrst chamber, unburned hydrocarbons and water from exhaust gases react to form elemental hydrogen (H2). The most common catalyst in this chamber of the converter is hnely divided rhodium metal. 

Powders containing bismuth compounds have long been used for decorative purposes to generate a shiny luster or lustrous colors (e.g., facial cosmetic powder in ancient Egypt, imitation pearls made by coating glass and ceramic beads). Bismuth oxychloride [7787-59-9], BiOCl, Mr 260.4, was the first synthetic nontoxic nacreous pigment. It is produced by hydrolysis of acidic bismuth solutions in the presence of chloride ions. Precipitation conditions may be varied (concentration, temperature,... 

Catalytic (Pellistor) Flammable gases Air Measures the heat output due to the catalytic oxidation of flammable gas molecules. A stream of the sample is passed over the sensor which is usually a ceramic bead impregnated with Pt or Pd. The temperature variations in the sensor due to reaction are monitored. Dependent on individual design. Flammable gas detector. Usually portable... 

Lu, Y. Irani, N. Grotewold, E. 2005. Covalent attachment of the plant natural product naringenin to small glass and ceramic beads. BMC Chem. Biol. 5 3. 

Figure 3. Temperature profiles for 9.5-mm ceramic beads Re = 120, Pcrf (ooj =...

Figure 6. Response profiles measured at extremely high hydrogen flow RbgSOj -coated ceramic bead in a modified F ir M FID component concentrations are adjusted to give response of comparable size. Figure at apex enhancement compared with regular FID.

Figure 7. Temperature-programmed GLC of N-diethylphosphate amino acid methyl ester derivatives [(EtO)2 PO NH CH(R)-COOMe. RbgSO -coated ceramic bead in a Barber-Colman FID. 5% Carbowax 20M on Chro-mosorb W, AW-DMCS, 60/80 mesh in a 2-m by 2.5-mm i d. Pyrex U-tube.

Glass and ceramic beads. Nor a type of organic resin but. sometimes used when high-temperatnreor high-prc.ssurc reactions are needed. 

Names ceramic beads, ceramic spheres, microspheres... 

Figure 2.21 shows the morphology of ceramic beads which are composed of a mixture of spherical particles. The unique beads produced by Kinetico have a denser shell to give them more mechanical strength and a porous interior to reduce their density (Figure 2.22). 

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