Heptane

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Related to N-heptane: acetone, toluene, N-hexane

heptane

[′hep‚tān]
(organic chemistry)
CH3(CH2)5CH3 A hydrocarbon; water-insoluble, flammable, colorless liquid boiling at 98°C; soluble in alcohol, chloroform, and ether; used as an anesthetic, solvent, and chemical intermediate, and in standard octane-rating tests.

Heptane

 

(n-heptane), the hydrocarbon C7H16, a colorless volatile liquid with a slight odor. Boiling point, 98.4° C; density, 0.6838 g/cm3 at 20° C; refractive index (nD20), 1.3876; heat of combustion, 1167.11 kilocalories per mole (25° C); explosion limits in air, 1.10-6.00 volume · percent; flash point, −17° C. Insoluble in water; soluble in ether and other organic solvents.

The dehydrocyclization of heptane to toluene is of great interest, playing an important part in catalytic reforming and the aromatization of petroleum products. Pure heptane can be prepared by the usual methods for synthesis of saturated hydrocarbons; it can also be isolated by fractionation of petroleum or synthetic gasoline. Heptane is used as a primary reference standard in determining the knock rating of carburetor fuels (the octane number of heptane is assumed to be zero). Among the structural isomers of heptane, 2,2,3-trimethylbutane (triptane) is of practical importance, being added to motor fuels.

References in periodicals archive ?
The promoted and normally type Y zeolite catalyst activity was studied by applying n-heptane catalytic cracking reaction.
Soot patterns around suspended n-Heptane droplet flames in a convection-free environment.
The feed composition, consisting of n-heptane, steam, and H2, used for the equilibrium predictions are listed in Table 1, and is the same as employed for the base simulation conditions in the kinetic model.
After centrifugation, the n-heptane phase was separated and transferred into a headspace vial.
Figure 2 illustrates the effect of the immersion time on the n-heptane absorption.
IRH waste which were adsorbed (Co, Li, Sb, Sn, V, and W) ions from SSAS at different operating conditions were segregated and classified according to its contain of above toxic metal ions (each one alone) and utilization from these remaining samples as a raw material in synthesis of promoted catalyst used in n-heptane isomerization which is zeolite type Y.
In these experiments n-heptane was used as an apolar completely spreading liquid and water and formamide as polar non-completely wetting one.
To characterize the interfacial reaction that took place during reactive blending, the blend samples were etched in the n-heptane at 60[degrees]C for 12 h to remove the unreacted POE or POE-g-GMA from the system.
Toluene and n-heptane were tested as diluents and resulted in different porosity and different capacity of the resins derived from them, as shown in Table 1.
x] layer, the sample was immersed into n-heptane ultrasonic bath during 1 min.