naphthene

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naphthene

[′naf‚thēn]
(organic chemistry)
Any of the cycloparaffin derivatives of cyclopentane (C5H10) or cyclohexane (C6H12) found in crude petroleum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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An OTR formulation comprised of a blend of natural rubber (NR) and styrene-butadiene rubber (SBR) is chosen for this study, and 1.25 parts per hundred rubber (phr) of MR is delivered to each formulation via different routes, (i.e., combinations of NR and SBR masterbatches and a naphthenic oil based DC), as shown in table 1.
He comes from Nynas AB, the PS1.4bn turnover Swedish supplier of naphthenic base oils and derivatives where he was sales director global accounts.
However, what he and UWindsor biology professor Jan Ciborowski found was that the GI treatment dramatically reduced the levels of organic pollutants--primarily naphthenic acids--concentrated in the tailings by the oil sand extraction process.
De-aromatic solvents, also called dearomatized hydrocarbon solvents or ultra-low aromatic solvents, are a class of hydrocarbon solvents that are characterized by the presence of paraffinic, iso-paraffinic, and naphthenic components with very low aromatic content (<2%).
The thermotropic liquid crystalline polymer is based on naphthenic polyesters; the laser activators are spinel crystals with two or more metal oxide clusters; and the dielectrics are ceramic fillers such as barium titanate or carbon particles.
Nynas recently acquired Shell's naphthenic oil refinery in Hamburg, Germany.
It is comprised of a tube holding denture cream that consists of 170.lg of baking soda, 28.35g of ground pumice stone and 142.05ml of mineral oil (selected from one of the following groups of light mixtures of alkanes in the C15 to C40 range from a non-vegetable source, a distillate of petroleum, a paraffinic oil based on n-alkanes, naphthenic oil based on cycloalkanes, aromatic oil based on aromatic hydrocarbons) and a double headed brush in which the front brush has coarse bristles for scrubbing and a rubber brush for deep cleaning.
Its naphtha output consists of naphthenic grades suitable for re-formulation into gasoline.
This book reviews the identification of naphthenic acids in crude oil and their influence on refinery process units.
KLT recommended REFLO 68A because it's an ammonia refrigeration compressor fluid used in industrial refrigeration systems--one that is formulated to outperform solvent refined paraffinic and naphthenic refrigerant oils.
As it is well known [12], the carboxylic and naphthenic acids are important surface active substances (SASt) and petroleum fluid components, and for solvation of the oil and gas hydrocarbons they form insoluble salts with the divalent calcium ([Ca.sup.2+]) and magnesium ([Mg.sup.2+]) cations.