Refrigerants freons

Environment Internal Treated cooling water External Freon refrigerant ... 

Subsequently the gas is precooled in exchanger E-6 and charged to a low temperature fractionator. This tower has a reboiler and a top refluxing system. At the top the conditions are 280psig and —75°F. Freon refrigerant at — 90°F is used in the condenser. The bottoms is recycled to the pyrolysis coil. The uncondensed vapor leaving the reflux accumulator constitutes the product of this plant. It is used to precool the feed to the fractionator in E-6 and then leaves this part of the plant for further purification. 

Liquids FM-5, FM-6, FM-5,6 AP are used as dispersion media in low-temperature oils and lubricants cooling heat carriers. They are also used in light-loaded high-speed ball bearings in freon refrigerating systems. 

DICHLORODIFLUOROMETHANE (CCI2F2), SMILES CIC(F)(CI)F Aiternative Names/Abbreviations Freon/Refrigerant 12, isotron, CFC-12... 

Neoprene s resistance to attack from solvents, waxes, fats, oils, greases, and many other petroleum-based products is one of its outstanding properties. Excellent service is also experienced when it is in contact with aliphatic compounds (methyl and ethyl alcohols, ethylene glycols, etc.), aliphatic hydrocarbons, and most Freon refrigerants. A minimum amount of swelling... 

THE MEASUREMENT AND ANALYSIS OF LIQUID VISCOSITY DATA FOR EIGHT FREON REFRIGERANTS. M.S. THESIS. 

Hydrothermal treatment can however be used constructively to modify the properties of an adsorbent. Perhaps the best example is the formation of ultrastable Y by hydrothermal treatment of sodium ammonium Y zeolite. The change is accompanied by a contraction in the unit cell parameter and an increase in the Si/Al ratio due to elimination of aluminum from the lattice. The resulting product shows greater thermal stability than Y zeolites of similar composition which have not been subjected to the hydrothermal treatment. However, with X zeolite the usual result is a loss of crystallinity with attendant deterioration of the adsorptive properties while with A zeolite a more subtle effect referred to as pore closure occurs. Hydrothermally treated 4A zeolite behaves as if the window aperture is somewhat smaller than in normal 4A sieve. This effect can be useful since a pore-closed 4A does not admit chlorinated hydrocarbons and is therefore useful for drying freon refrigerants. If a wider pore sieve is used for this purpose premature breakdown and loss of capacity may occur due to formation of HF and/or HCl by hydrolysis. The precise mechanism of pore closure has not yet been established and it remains uncertain whether it involves a true modification of the ciystal structure or merely a rearrangement of the surface layers. 

Parmelee, H. M., Water Solubility of Freon Refrigerants, Refrigerating Engineering, December 1953,... 

Neoprene - In general, neoprene compounds have excellent resistance to all straight-chain hydrocarbons, all aliphatic hydroxy compounds such as methyl and ethyl alcohols and ethylene glycol, animal and vegetable fats and oils, and fluorinated hydrocarbons such as Freon refrigerants. 

Markwood W., Benning A. Thermal conductances and heat transmission coefficients of freon refrigerants.—J. ASHRAE, 1943, No. 2, p. 95—99. 

Midgley, T. fV, From the Periodic Table to Production The Life of Thomas Midgley, fr, the Inventor of Ethyl Gasoline and Freon Refrigerants (Stargazer Publ. Go., Corona, CA, 2001). 

Freon (refrigerant propellant) Nitrobenzene Nitrocellulose lacquer Phenol... 

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