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(Chemistry) chem a colourless gaseous hydrocarbon that is an isomer of butane and which is used as a fuel and a refrigerant. Formula: (CH3)3CH


(ˌaɪ səˈbyu teɪn, -byuˈteɪn)

a colorless, flammable gas, C4H10, used as a fuel, a refrigerant, and in the manufacture of gasoline by alkylation.
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According to the thermal (or exergy) efficiency, eleven examined working fluids can be sorted from high to low performances as: cyclohexane, n-hexane, R-113, n-pentane and Iso-pentane, R-245fa, n-butane, Iso-butane, RC-318 and R-236fa, and at last R-227ea.
Additional composition limits include (1) a maximum total C4+ content (such as the sum of normal butane, iso-butane, and heavier hydrocarbons) of 1.
The concentration of hydrocarbons C1-C3 decreases whereas iso-butane entirely decomposes in the mechanical activation of the hydrates samples.
It details emerging market trends, pricing, and market news for ethane, iso-butane, natural gasoline, normal butane, and propane in the Japan, Persian Gulf, Mediterranean, Northwest Europe, and US Gulf Coast markets.
An effort supported jointly by Coca-Cola, Greenpeace, McDonald's, PepsiCo and Unilever to reduce the use of hydrofluoroolefins, or HFOs, is one indication of the direction the industry is taking to increase the use of natural refrigerants such as propane, iso-butane, CO2, ammonia and other alternatives, he adds.
The composition of gas produced at the wellhead varies widely, but in most cases it contains pure natural gas (also known as methane, which is colorless and odorless); natural gas liquids (NGLs) such as ethane, butane, propane, iso-butane, and natural gasoline; and a number of impurities, including carbon dioxide and water.
The principal inputs to the process are liquid olefins and iso-butane (iC4).
To accommodate the significant increase in NGL production resulting from the processing expansions, MarkWest Liberty is constructing fractionation capacity of 60,000 barrels per day, which will allow for the production of commercial iso-butane, normal butane, and natural gasoline in addition to the current capabilities of producing purity propane.
Tenders are invited for Supply of Iso-Butane Gas With Cylinder
The processing plant has an above-ground NGLs storage capacity of 190,000 barrels and is interconnected with Crosstex's Cajun-Sibon pipeline and Riverside fractionation system, which separates ethane, propane, iso-butane, normal butane and natural gasoline.
Limited Tenders are invited for 1)Commercial Straight Run (Sr-Grade) Lpg, Conforming To Is:4576, Having Distinct Mercaptan Odour As Per Oisd Norms, Propane 30-58 Percent , Butane & Iso-Butane 70 Percent Max.