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.
References in periodicals archive ?
ISO 32 Naphthenic and Paraffinic Mineral Oil and ISO VG32 Alkylbenzene in C[O.
The most toxic of these are a mixture of compounds known as naphthenic acids that are resistant to breakdown and persist as pollutants in the water used to extract the oils and tar.
An environmentally friendly substitute is provided either by TDAE oils or naphthenic oils, and Lanxess's Performance Butadiene Rubbers business unit is to enter a strategic co-operation with Swedish oil producer Nynas.
Tailings contain sand, silt, clay, water and a host of toxic compounds, including residual bitumen, naphthenic acids, phenolic compounds, ammonia-ammonium and metals.
The three soluble copper(II) systems that showed promise were copper plus benzoic acid, copper plus naphthenic acid, and copper plus relatively small amounts of the azole (or triazole) propiconazole.
All run on ammonia and use naphthenic base mineral oil (ISO-VG46 or ISO-VG68) as lubricants.
The second fraction (Table 5) contains paraffinic, olefinic and naphthenic hydrocarbons uneluated with pentan.
of Kilgore, Texas, in September acquired the 83-year-old company that refines naphthenic lubricating and process oils, and also blends and packages its own products.
Nynas Naphthenics is the market's leading producer of naphthenic specialty oils.
A Swedish-based company whose core activities are naphthenic specialty oils and bitumen, Nynas has around 800 employees and subsidiaries in 25 countries.
100 SSU Aromatic content 10-20% Naphthenic content 35-45% Paraffinic content 40-50% Viscosity index Less than 52 SSU
Their composition and raw material base consist primarily of naphthenic oils, with the addition of specific lubricity ingredients and EP (extreme pressure) agents and other additives.