Liquified compressed gas

Vinyl Methyl Ether, Inhibited Liquified compressed gas 5.5 (decomposes) -122 0.777... 

A non-liquified compressed gas is a gas, other than gas in solution, which under the charged pressure is entirely gaseous at a temperature of 70°F. 

Compressed Gas A gas that is under pressure, either still in the gaseous state, or liquified. The term compressed gas means (i) a gas or mixture of gases having, in a container, an absolute... 

PETROLEUM GAS, LIQUIFIED, COMPRESSED (68476-85-7) Highly flammable gas a mixture ofpropane, butane, isobutane, propylene, butylenes, and other flammable hydrocarbon gases of low molecular weight refined from petroleum [explosion limits in air (vol %) 2.2 to 9.5... 

PETROLEUM GAS, LIQUIFIED, COMPRESSED (68476-85-7) A mixture of propane, butane and other flammable gases (flash point about — 100°F/—74°C flash point propane -156°F/—104°C cc flash point butane -76°F/-60°C cc). Violent reaction with strong oxidizers. Attacks some plastics, rubber, and coatings. Flow or agitation of substance may generate electrostatic charges due to low conductivity. 

Table 17.1 lists the physical characteristics, such as vapor pressure and boiling point, of some representative compressed gases, liquified gases, and cryogenic liquified gases, and shows some of the characteristics of the cylinders used for these gases. In Section 17.2 we will discuss the characteristics of compressed gas cylinders in detail. 

Compressed gas <7linder A qrlinder containing vapor or gas under higher than atmospheric pressure, sometimes to the point where it is liquified. 

Liquified petroleum gas A compressed or liquefied gas usually composed of propane, some butane, and lesser quantities of other light hydrocarbons and impurities, obtained as a lyproduct in petroleum refining. Used chiefly as a fuel and in chemical synthesis. 

In summary, starting with 105°F gas at atmospheric pressure, the theoretical work necessary to liquify one pound of methane is 510.8 Btu or 352 hp/MMcfd. The simplified liquefaction process, as illustrated, uses a turboexpander/compressor and a small propane refrigeration unit. The 41.25% efficiency breaks down as follows one-fourth contributed by the turboexpander/compressor at 35.8% efficiency one-sixteenth contributed by the mechanical propane refrigeration unit at 43% efficiency, at a moderate temperature where its efficiency is high and a large fraction—eleven-sixteenths—contributed at 58.2% efficiency by compression and Joule-Thomson condensation energy. 

Observable Characteristics - Physical State (as normally shipped) Compressed liquified gas Color. Colorless Odor. Pungent extremely pungent. 

Considerable research is being devoted to improve existing techniques, to accelerate the deacidification process, render it applicable for the treatment of bound volumes and reduce the cost of operations. Nonaqueous deacidification has been improved in the past ten years and has reached commercial success. The new process is conducted by introducing "liquified gas" into a chamber containing books. Once the acid ions in the paper have been neutralized, the "gas" is pumped out of the compression chamber and returned to a storage tank. The books can then be dried and return to the shelves. Since a nonaqueous deacidification process does not require books to be unbound as does an aqueous process, its development dramatically reduced the cost of operation. 

Ammonia systems consist of a compressor designed to compress the low-pressure ammonia gas from the SSHE. The gas is then discharged from the compressor into the condenser. When ammonia is under a pressure of 150 psi (10 bar), it will liquify at a temperature of 25.6°C (78°F) (71). Condensers can be of the air-cooled or water-cooled type covering also evaporative condensers (72). From the condenser, the liquid ammonia flows to the receiver. The receiver in which the high-pressure ammonia liquid is stored maintains a constant supply of refrigerant to the SSHE. 

Technically, phosgene can be exempted from the supply labelling regulations, because it is a "compressed/liquified gas". However, in view of its extreme toxicity and hazardousness, this exemption cannot be recommended [327a]. 

The hard-sphere gas cannot be liquified. Liquification requires attractive forces. Attractive forces can also cause the pressure to be less than the perfect gas result. Interestingly, attractive forces are not required for the existence of a solid phase. If the hard sphere gas is compressed. 

Vinyl Ruoride, Inhibited — Rre Hazards Flash Point (deg. F) Not pertinent. This is a flammable, compressed liquified gas Flammable Limits in Air %) 2.6 - 21.7 Fire Extinguishing Agents Allow fire to bum out stop the flow of gas if feasible. Cool adjacent containers with... 

Feed gas containing VCM and air is sent to the membrane system. The VCM-enriched permeate from the membrane system is compressed in a liquid-ring compressor and cooled to liquify the VCM. A liquid-ring compressor is used because of the flammable namre of vinyl chloride. The noncondensable gases arc mixed with the feed gas and returned to the membrane section. The residue stream is sent to flie incinerator, where the remaining VCM... 

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