Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Naphthenic acids (NAs) are mixtures of several cyclopentyl and cyclohexyl carboxylic acids with molecular weights of 120 to well over 700 atomic mass units. The main fractions are carboxylic acids with a carbon backbone of 9 to 20 carbons. McKee et al. claim that "naphthenic acids (NAs) are primarily cycloaliphatic carboxylic acids with 10 to 16 carbons",[1] although acids containing up to 50 carbons have been identified in heavy petroleum.[2]
^Richard H. McKee; Colin M. North; Paula Podhasky; Jeffrey H. Charlap; Adam Kuhl (February 2014). "Acute and Subchronic Mammalian Toxicity of Naphthenic Acids from Oil Sands Tailings". International Journal of Toxicology. 33 (1): 347–355. doi:10.1177/1091581813504229.
^Qian, K. and W.K. Robbins (2001). Resolution and identification of elemental compositions for more than 3000 crude acids in heavy petroleum by negative-ion microelectrospray high-field Fourier Transform ion cyclotron resonance mass spectrometry. Energy & Fuels. 15:1505-1511.
Naphthenicacids (NAs) are mixtures of several cyclopentyl and cyclohexyl carboxylic acids with molecular weights of 120 to well over 700 atomic mass units...
is derived from the words naphthenicacid and palmitic acid. It is well accepted in the medical community that palmitic acid from dietary sources raises...
is usually the naphthenicacids in the crude oil that cause corrosion problems. This type of corrosion is referred to as naphthenicacid corrosion (NAC)...
thickening and gelling agents: coprecipitated aluminium salts of naphthenicacid and palmitic acid. A team led by chemist Louis Fieser originally developed napalm...
Copper naphthenate is a copper derivative of naphthenicacid. Although commonly called salts of naphthenicacid, copper naphthenate is not ionic, but is a...
displaced increasingly by synthetic acids such as 2-ethylhexanoic acid or petroleum-derived naphthenicacids. Resin acids are protectants and wood preservatives...
including naphthenicacids, it may be possible to monitor rivers for leachate and also to remove toxic components. Such identification of individual acids has...
S. state of Oklahoma. Acetic acid (HAc) High acid crude oil, a crude oil with a high concentration of naphthenicacids High Alumina Cement (HAC), now...
oxidation of tetrahydronaphthalene to the hydroperoxide. Like naphthenicacid, 2-ethylhexanoic acid forms lipophilic complexes that are used in organic and...
are derived from the carboxylates of lipophilic carboxylic acids, such as naphthenicacids to make the complexes oil-soluble. These catalysts speed up...
organized on cleaning the fuel with alkali and production of crude naphthenicacid in this unit under the license of “Merichem” company (USA). Catalytic...
asphaltenes and resins. In particular it contains naphthenicacids, an oil industry term for a group of carboxylic acids which can be up to 3 percent of the oil...
manganese, and iron, prepared as "salts" of lipophilic carboxylic acids such as naphthenicacids, in order to give them a soap-like chemical formula and make...
" Oil sands tailings pond water contains toxic chemicals such as "naphthenicacids (NAs) and process chemicals (e.g., alkyl sulphates, quaternary ammonium...
Processes & Impacts, the tailings ponds contain toxic chemicals such as "naphthenicacids (NAs) and process chemicals (e.g., alkyl sulphates, quaternary ammonium...
refinery could run high TAN crude oil (crude oil with a high content of naphthenicacids). The refining operations were shut down in the fall of 2010 and the...
organic solvent, these catalysts are often derived from naphthenicacids and ethylhexanoic acid, which are highly lipophilic. These catalysts initiate...
present were tricyclic diamondoid acids. These structures had previously not even been considered as naphthenicacids and suggests an unprecedented degree...
The abundance of naphthenicacid in the oil however made the development unattractive at the time. The crude is heavy and naphthenic and is generally...
Taguchi, Vince Y.; Headley, John V. (2014-08-05). "Characterization of NaphthenicAcids by Gas Chromatography-Fourier Transform Ion Cyclotron Resonance Mass...
hydroxide is consumed and the resulting wastewaters (cresylic for gasoline; naphthenic for kerosene/jet fuel; sulfidic for LPG -spent caustics) are often mixed...
contains higher percentage of isoparaffinic (branched) hydrocarbons and naphthenic hydrocarbons. Millions of tons of paraffin waxes are produced annually...
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