Cold cleaning

The use of hot gas clean-up methods to remove the sulfur and particulates from the gasified fuel increases turbine performance by a few percentage points over the cold clean-up systems. Hot gas clean-up permits use of the sensible heat and enables retention of the carbon dioxide and water vapor in the... 

The Occupational Exposure Standards imposed for trichloroethylene are Maximum Exposure Limits of 100 ppm (8 hr TWA) and 150 ppm (15 minute reference period). A skin notation Sk is applicable because of the potential for skin absorption. Because of its volatility, trichloroethylene is not recommended for cold cleaning it is normally used in partially enclosed vapour degreasing equipment provided with local exhaust ventilation. 

The affected area should be cooled by holding in cold, clean running water. Swelling is liable to occur so jewellery or clothing likely to cause constriction must be removed. The... 

Uses Organic synthesis vapor degreasing and cold cleaning solvent for fabricated metal parts textile processing aerosol propellants synthesis of fluoropolymers production of various coatings and inks may be ingredient in adhesives, cutting oils, and aerosol formulations pesticide. 

Sul fury 1 fluoride (S02F2) also formed, and also some unidentified compds. The by-products were distilled into a cold, clean, dry steel cylinder strong enough to withstand pressure of 135 ami. (The vapor press of SOflF2 at RT is ca 10 a tin). When cylinder was brought to RT, the contents of the cylinder exploded. Dr Cady thought (hat violence of expln suggested a chem expln rather (han a simple rupture by gas pressure... 

The by-products were distilled into a cold, clean, dry steel cylinder strong enough to withstand press of 135 atm. On warming to RT the cylinder violently exploded]... 

Uses of 1,1,1-trichloroethane are in vapor degreasing, cold cleaning, aerosols, adhesives, intermediates, and coatings. 

Warm/Dirty Adjacent to the hospitai, usuaiiy near the Emergency Department (remote to the reiease site) Hospitai decontamination area. This area needs a source of water (coid ciimates require a warm water source) for decontamination and barriers to controi entrance and exit from the area, which must be tightiy controiied. Personnei working in this area (first receivers) have potential to be exposed to the contaminant(s) and, therefore, must wear the appropriate level of PPE (level C minimum). At the entrance to the Warm Zone is the initial triage station. All ambulance and walk-in cases must enter the facility after going through this triage station. Victims who are clearly not contaminated skip the Warm Zone and enter the Cold (Clean) Zone directly. All others proceed into the Warm Zone for decontamination. 

Soap, brushes, sponges and other equipment used for decontamination should be placed in atrashcan and not carried into the Support Zone (on-scene) or the Cold (Clean) Zone (hospital setting). 

The conventional metal cleaning processes have been vapor degreasing, solvent immersion cleaning and cold cleaning. The solvents commonly used in these processes. 

Cold cleaning degreasers that have a degreaser opening that is greater than 10 (0.93 m ) shall ... 

Use Cold cleaning, vapor degreasing, resins application, dry-film photoresist processing, adhesive solvent, in aerosols as solvent and vapor-pressure depressant. 

Trichloroethane was developed initially as a safer solvent to replace other chlorinated and flammable solvents. Current uses of 1,1,1-trichloroethane and percentages of total amount devoted to each use are vapor degreasing, 31% cold cleaning, 18% aerosols, 12% adhesives, 10% chemical intermediate, 10% coatings and inks, 7% textiles, 4% electronics, 3% other, 5% (Chemical Marketing Reporter 1992). 

Environment - it is important to remember that the primary management described above may be severely limited by the need of the rescuer to wear protective clothing. Therefore, only those skilled in these techniques and trained in protective clothing should enter and treat casualties in a contaminated area. All others should await the casualties arrival in cold/clean zone, following decontamination. 

PPG Perchlor. [PPG Industries] Per-chlorethyloie solvent for vaprx degreasing, cold cleaning, or drycleaning applies. 

Trichloroethane. [Ethyl] Tri-chlorethane chltuinated solv. for cold cleaning, vsq x>r degreash, in formulations. 

ORIGIN/INDUSTRY SOURCES/USES not a natural product wastewater discharges stack fugitive emissions from production volatilization losses from use in cold cleaning of metals losses from vapor degreasing solvent, aerosol spray used in cleaning agents and pesticides... 

Precision cleaning of electronic parts in removing no-clean and rosin flux residues in vapor degreasing and cold cleaning... 

Uses Precision cleaning solvent for cleaning printed circuit boards, elec, components, motors, and other temp, sensitive items solvent for coatings, adhesives, aerosols, and cold cleaning Features Nonflamm., non-CFC drop-in replacement for 1,1,1 trichloroethane and other chlorinated soivs., incl. TCE, methylene chloride, and also HCFCs... 

For various reasons, e-g.> Xe poisoning, depletion of II, etc., the reactivity of the reactor is.lower during high-power operation than during zero-power operation. The reactor therefore must be built considerably larger than is necessary to be critical in the cold, clean state. Before summarizing the reactivity losses which are entailed by Xe + Sm, depletion of U, and temperature rise, the conventions for expressing reactivity loss will be reviewed briefly ... 

Two start-ups must be considered separately, first for the case for the clean, cold reactor, and second for the case when the reactor has.been shut down from a high level and must be started up again quickly. When an enriched. reactor starts from a cold, clean state to a power level of 3 10 watts, as in the MTR, the range to be covered by control instruments is from 10 x full power to nnity full power (in terms of total number of fissions per second, 3 lO watts requires about 10 - fissions/sec). 

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