Ignition temperature ethylene

Ethylene is a colorless, flammable gas with a faint, pleasant odor and a bp of-103.8°C. The flash point, the lowest temperature at which the vapors of a liquid decompose to a flammable gaseous mixture, is -I36.1°C. The ignition temperature, the temperature at which a substance begins to bum, is 450°C. Ethylene is sold from 95% purity (technical) to 99.9% purity. It can be transported by pipeline or by tank car. Smaller amounts come in 100-lb cylinders. Much of it is used on site by the company to make other products. 

Benzene is a clear, colorless, flammable liquid with a pleasant characteristic odor, bp 80.1°C, flash point -11.1°C, and ignition temperature 538°C. Benzene has been found to be very toxic and is on the list of Known to Be Human Carcinogens published every two years by the Department of Health and Human Services under the National Toxicology Program (NTP). There are four top 50 chemicals on this worst carcinogen list benzene 1,3-butadiene ethylene oxide and vinyl chloride. There are also four chemicals in the top 50 on the Reasonably Anticipated to Be Human Carcinogens list acrylonitrile, ethylene dichloride, formaldehyde, and propylene oxide. 

When gases from the reactor or the high-pressure separator are discharged through the chimney into the air, explosive mixtures can be formed. The explosion limits of mixtures of ethylene with air, as well as methane, hydrogen, and vinyl acetate with air are listed in Table 7.2-1 together with the ignition temperature. 

From Table 7.2-1 it can be seen that hydrogen is the most critical compound regarding the wide range of explosion-limits. Also, ethylene is critical because of its low ignition temperature. 

A liquid perfluorocarbon was being used as solvent in an oxidation by oxygen under pressure more energy was released than expected [1], It is cautioned that fluorocarbons are not inert to oxidation, presumably to carbonyl fluoride. An explosion has been experienced with perfluorotoluene in like circumstances [2], A correspondent reports that perfluorotoluene is flammable in air, more saturated perfluorocarbons in pure oxygen [3]. Another detailed the combustion performance of polytetrafluoro-ethylene 148 kcal/mole ignition temperature not below 465°C at 7000 psi of oxygen [4], the product is mostly carbonyl fluoride. Other oxidants may also present a risk in extreme circumstances. 

ETHYLENE ALDEHYDE (107-02-8) CHj=CHCHO Highly flammable liquid extremely low ignition temperature makes it very dangerous. Forms explosive mixture with air [explosion limits in air (vol %) 2.8 to 31 flash point -15°F/-26°C autoignition tenq) 453°F/234°C Fire Rating 3]. Unstable and very reactive. In storage, over time, it can form heat- and shock-sensitive... 

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