Liquid sulfur carriers

Since the reaction is instantaneous and complete, the reactor volume is very small. However, 25% oleum is used as a carrier to provide uniform mixing of liquid sulfur trioxide and liquid sulfur. Agitation with a proper mechanical seal is provided to ensure complete reaction. 

Antico, E. Masana, A. Hidalgo, M. Salvado, V. Valiente, M. New sulfur-containing reagents as carriers for the separation of palladium by solid supported liquid membranes. Hydrometallurgy 1994, 35, 343-352. 

The second stage can be carried out in the liquid phase by sulfuric acid, or in the gas phase by phosphoric acid adsorbed on a carrier. 

TPO analyses were performed in a TPD/TPR 2900 (Micromeritics) equipment with a thermal conductivity detector a trap for sulfur compounds and a Pt/Silica bed for oxidation of CO and hydrocarbons to CO2. Eurthermore, it has a cold trap (isopropyl alcohol/liquid nitrogen) to condense CO2 and residual moisture. The combustion products are passed through the previous traps connected in series in order to remove other compounds different from O2 in the carrier gas. This ensures that the conductivity changes observed in the detector are attributed exclusively to changes in oxygen concentration in the carrier gas. 

Fifty grams of sulfur monochloride are placed in the distilling flask of the set-up outlined in the procedure for that substance (No. 81). About O.lg of iron powder is added to the liquid as a halogen carrier and bone-dry chlorine is led in steadily (3-4 bubbles/sec) for one-half hour. The dark liquid that is produced is allowed to stand one hour and then... 

Emulsion flotation is analogous to carrier flotation. Here, small-sized particles become attached to the surfaces of oil droplets (the carrier droplets). The carrier droplets attach to the air bubbles and the combined aggregates of small desired particles, carrier droplets, and air bubbles float to form the froth. An example is the emulsion flotation of submicrometre-sized diamond particles with isooctane. Emulsion flotation has also been applied to the flotation of minerals that are not readily wetted by water, such as graphite, sulfur, molybdenite, and coal [623]. Some oils used in emulsion flotation include mixed cresols (cresylic acid), pine oil, aliphatic alcohols, kerosene, fuel oil, and gas oil [623], A related use of a second, immiscible liquid to aid in particle separation is in agglomeration flocculation (see Section 5.6.4). 

FENCHLOROPHOS or FEN-CHLORPHOS (299-84-3) CjHaCLOjPS (CH30)2PS0CjH2C1j Noncombustible solid. Commercial liquid formulations may contain flammable organic carrier solvents. Tenqwratures above 300°F/149°C may cause explosive decomposition and release of toxic HCl, phosphorus oxides, sulfur oxides. Contact with strong oxidizers may cause fire and explosions. Incompatible with antimony(V) pentafluoride, lead diacetate, magnesium, silver nitrate. Attacks some plastics, rubber, and coatings. 

METHYL AZINPHOS (86-50-0) (86-50-0) CioHjiNjOjPS, Combustible solid or liquid in an organic carrier solvent (see also entry for that specific carrier solvent). Hydrolyzes in water the process accelerates under alkaline conditions. Inconq)atible with perchloric acid. Contact with strong oxidizers may cause fire and explosions. Unstable at temperatures above 392°F/200°C when exposed to elevated temperatures, the containers may explode. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, water spray, or CO2 extinguishers. Thermal decomposition releases toxic nitrogen oxides, phosphoms oxides, and sulfur oxides. 

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