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 ?
In their computational study, including the neat PRF compounds iso-octane and n-heptane, kinetic and thermophysical effects on ignition delay times over conditions (600-1100 K, 9 and 60 atm) similar to this study were investigated.
The increase in total flux can be attributed to the following reasons: (a) with increasing temperature, the mass transfer coefficients of the thiophene and n-heptane increase (as shown in Table 2); (b) the polymer segments also become more flexible and larger available free volume or diffusion path emerge in the membrane; (c) the difference in vapor pressure across the membrane is enhanced with increasing temperature, as a result, the transport driving force of the permeating components is also enhanced.
Table 6 and 7 showed the activities of lipase and phospholipase enzymes in different solvents and results indicated that in n-heptane, both the enzymes showed their maximum activities.
Laminar Burning Velocity of Gasoline and the Gasoline Surrogate Components iso-octane, n-heptane, and toluene," Fuel 112, 355-65:2013.
Liu YC, Avedisian CT (2012) A Comparison of the Burning Characteristics of Sub-millimeter Droplets of Binary Mixtures of iso-Octane, n-Heptane and Toluene with a Commercial Unleaded Gasoline, Combustion and Flame 159:770-83.
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.
At the present, no significant research work has been reported related to isomerization of lighter hydrocarbon (especially n-hexane, n-heptane, n-octane, light naphtha, etc.
The validation of the model was previously reported for n-heptane, n-butanol, and methyl-esters [32] (+Ewergy & Fuels, 2017, Submitted).
Although the contribution of the increased laminar flame speed with a higher n-heptane mixture ratio was also expected.
Limited Tenders are invited for Astm Grade Iso Octane,Toluene, N-Heptane For Cfr Octane System With Certificate Traceable To Nist
N-heptane, ethanol, isopropyl alcohol, and dibutyltin dilaurate (DBTL) (Beijing Jingyi Chemical Reagents Corp.