Silica Analyzer monitors silica continuously in the range of 0-100 ppb. It alerts user to changes in silica levels in time for corrective action to be taken before significant downtime is incurred. The silica analyzer uses an all integrated and continuous monitoring using silico molybdate blue method for colorimetric measurement at a wavelength of 820 nm. They are available in panel or wall-mount version. It self-checks new calibration parameter and generates warning or alarm message if deviation from primary calibration parameter occurs. This analyzer also has a reagent and calibration solution through non-proprietary reagent as well as reagent with ceramic pulse pumps. The analyzer also detects performance deterioration of ion-exchange resin by measuring silica density in ultra-pure water.
Silica powder is a white amorphous powder. It is synthesized from sodium silicate at room temperature using emulsion containing water, nonionic surfactant of Triton N-57, and cyclohexane. It is the best filling material and additive in comprehensive applications including paint-coatings, adhesive, sealants, silica gels and epoxy resins.
A precipitated silica powder's BET specific surface area ranges from 40 to 200 m2 /g. The CTAB specific surface area ranges from 140 to 200 m2 /g. The DOP oil absorption of precipitated silica powder ranges from 180 to 350 ml/100 g. Its pore size distribution such that the pore volume provided by pores ranging from 175 to 275 Å in diameter. It is white in color.
Silica resistant catalysts are used for coker naphtha hydroprocessing. These catalysts have significantly high surface area per unit volume. It is intended for use where silica poisoning is severe. Some catalysts exhibit good olefin saturation activity and are well suited for use in low temperature guard reactors.