Isobutane flash point

ISOBUTANAL (78-84-2) Forms explosive mixture with air (flash point — 1°F/ — 18°C). Oxidizes slowly in air, forming isobutyric acid. Violent reaction with strong oxidizers, strong acids, bromines, ketones. Incompatible with caustics, ammonia, amines. 

ISOBUTANE (75-28-5) Flammable gas (flash point — 113°F/—81°C). Violent reaction with strong oxidizers. Reacts with acetylene, halogens, and nitrous oxides. Flow or agitation of substance may generate electrostatic charges due to low conductivity. 

A catastrophic explosion and major fire occurred within a major refinery as operations prepared a system for valve maintenance. This refinery stored a flashing flammable fluid (isobutane with a boiling point of 11° F or —12° C) in two spherical tanks. The spheres connected to an alkylation unit via a 10-inch (25 cm) line. Operating line pressure was about 50 psig (345 kPa gauge) and one of the valves in this underground system was in an open pit. [9]... 

The much simpler mechanism found for the flash photolysis may have resulted from the longer wavelenght used. The results found, however, point out the complications that can be encountered with secondary photolysis. This suggests the possibility that acetylene, isobutane and perhaps part of the methane, ethane and ethylene could arise from secondary photolysis iji the steady-photolysis studies. 

A disadvantage with the slurry processes is that the diluent contained in the slurry from the reactor has to be separated Ifom the polymer powder and purified before it is recycled back into the reactor. This process step is more complicated and more expensive than the corresponding recycling system for the gas phase process. Using a light diluent (isobutane, propane) makes it possible to separate most of the diluent by a direct flash of the slurry Ifom the reactor, which is not feasible with heavier diluents due to the higher boiling point. 

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