naphthene


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Related to naphthene: naphthalene, Aromatics, paraffins

naph·thene

 (năf′thēn′, năp′-)
n.
Any of several cycloalkane hydrocarbons having the general formula CnH2n and found in various petroleums.


naph·then′ic (-thĕn′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

naphthene

(ˈnæfθiːn; ˈnæp-)
n
(Chemistry) any of a class of cycloalkanes, mainly derivatives of cyclopentane, found in petroleum
[C20: from naphtha + -ene]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

naph•thene

(ˈnæf θin, ˈnæp-)

n.
any of a group of hydrocarbon ring compounds of the general formula CnH2n, found in certain petroleums.
[1840–50; naphth(a) + -ene]
naph•the′nic (-ˈθi nɪk, -ˈθɛn ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Summary: Two new monocyclic naphthene derivatives (1and 2) along with seven known compounds for the first time from the chloroform soluble fraction of the Tamarix indica.
Type II kerogen is dominated by cyclic (naphthene and aromatic) structures, and derived from a mix of algal, grassy and woody remains.
The mainstream method separates the asphalt binder into aliphatics, naphthene aromatics, polar aromatics, and asphaltenes according to different polarities created by Corbett [48].
Another critical aspect is the choice of an "aging parameter." Since oxidation alters the bitumen composition, aging evaluation may be approached starting from the well-known fractionation proposed by Corbett [9] in saturates, naphthene aromatics, polar aromatics, and asphaltenes, in the order of their increasing molecular polarity.
Reaction A B E/R Paraffin global step [C.sub.12][H.sub.24] + 6[O.sub.2] 3.888E4 1 1.220E4 [right arrow] 12CO + 12[H.sub.2] Naphthene global step [C.sub.12][H.sub.24] + 6[O.sub.2] 2.132E7 1 1.965E4 [right arrow] 12CO + 12[H.sub.2] [H.sub.2] + [O.sub.2] = OH + OH 1.700E13 0 2.407E4 OH + [H.sub.2] = [H.sub.2]O + H 2.190E13 0 2.590E3 OH + OH = O + [H.sub.2]O 6.023E12 0 5.500E2 O + [H.sub.2] = H + OH 1.800E10 1.0 4.480E3 H + [O.sub.2] = O + OH 1.220E17 -0.9 8.369E3 M + O + H = OH + M 1.000E16 1 0 M + O + O = [O.sub.2] + M 2.550E18 0 5939E4 M + H + H = [H.sub.2] + M 5.000E15 -1.0 0 M + H + OH = [H.sub.2]O + M 8.400E21 0 0 CO + OH = H + C[O.sub.2] 4.000E12 -2.0 4.030E3 CO + [O.sub.2] = C[O.sub.2] + O 3.000E12 0 2.500E4 CO + O + M = C[O.sub.2] + M 6.000E13 0 0
Naphthene is used to describe the group of cycloalkanes.
However, no correlation was found between the atomic force microscopy morphology and the composition made up of asphaltenes, polar aromatics, naphthene aromatics and saturates [52].
The ASTM D4124-84 method separates the pure bitumen into four fractions: saturates, naphthene aromatics, polar aromatics and asphaltenes.
Its chemical composition consists of a great variety of chemical components, which can be classified as asphaltenes, polar aromatics, naphthene aromatics and saturates.
Gasoline was modeled as a surrogate blend of seven components, intended to emulate the paraffin, isoparaffin, aromatic, naphthene, and olefin content of typical gasoline as shown in Table 2.
Naphthene is the main compound contributing to S2 peak, while aromatic compounds have a minor part (Table 2).
These compounds belong to the classes, fatty acids and their esters, triglycerides, alcohols, steroids and their glycosides, phenol derivatives, coumarins, alkaloids of different classes, monocyclic naphthene derivatives, terpenes and flavonoids, and their glycosides.