- Is- by Webster's
... of certain isomeric series in whose structure one carbon atom, at least, is connected with three other carbon atoms; -- contrasted with neo- and normal; as in isoparaffine; isopentane.A prefix or combining form, indicating identity or equality; the same numerical value; as in isopod, isomorphous, isochromatic.
- Gas-Fractionation Plant by Great Soviet Encyclopedia
... butane, and gasoline into isopentane, normal pentane, and hexanes, and so on, is performed in a similar manner. The approximate pure-substance content after processing of natural gasoline isas follows: propane 96 percent, isobutane 95 percent, normal butane 96 percent, isopentane 95 percent, and stable gasoline 74 percent (in commercial products with these names)...
- Pentane by Great Soviet Encyclopedia
... hydrocarbons that are synthesized from synthesis gas, a mixture of CO and H 2. Heating in the presence of HF, AlCl 3, or an aluminum-platinum catalyst converts n. -pentane into isopentane, the raw material from which isoprene is obtained. Pentanes are constituents of motor fuels and the starting materials in many petrochemical processes and basic organic synthesis.
- Critical Temperature by Great Soviet Encyclopedia
... systems (for example, propane-isopentane) the fluid-vapor equilibrium has no single critical temperature but rather a spatial critical curve for which the terminal points are the critical temperatures of the pure components.(2) The temperature in fluid mixtures having components of limited solubility at which the mutual solubility becomes unlimited; it is called the ...
- Isoprene by Great Soviet Encyclopedia
... catalytic dehydrogenation of isopentane and isoamylenes; and (3) dimerization of propylene to 2-methyl-l-pentene, followed by isomerization to 2-methyl-2-pentene, followed by pyrolysis (650°-800°C) to isoprene. In addition, isoprene can be separated from the gases resulting during the thermal decomposition of petroleum products (from a C 5 fraction of the byproducts ...