naphthenicadj.
/nafˈθiːnɪk/, /napˈθiːnɪk/, /nafˈθɛnɪk/, /napˈθɛnɪk/, U.S. /næpˈθɛnɪk/, /næfˈθɛnɪk/ Chemistry.
1. naphthenic acid n. any of the carboxylic acids obtained in the refining of petroleum, esp. one derived from an alicyclic compound (as cyclohexane or cyclopentane); (also) an unspecified mixture of such acids.
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the world > matter > chemistry > organic chemistry > organic acids > [noun] > carboxylic acids > miscellaneous others
urobenzoic acid1836
adipic acid1838
azelaic acid1838
isethionic acid1838
rutinic acid1845
rutic acid1848
glyoxylic acid1856
malonic acid1859
piperic acid1863
butalanine1865
methacrylic acid1865
barbituric acid1866
pichuric acid1866
carboxylic acid1868
gluconic acid1871
xylic acid1872
xylidic acid1872
aconic acid1873
formobenzoic1873
nicotinic acid1873
hydracrylic acid1877
undecylenic acid1879
isonicotinic acid1883
isatoic acid1885
linolenic acid1887
hendecenoic acid1889
heptenoic acid1889
mannonic acid1890
phenolcarboxylic acid1893
naphthenic acid1894
aldonic acid1904
naphthaleneacetic acid1917
heptanoic acid1928
hexuronic acid1928
pantothenic acid1933
neuraminic acid1942
pantoic acid1945
penicillanic acid1953
mevalonic acid1957
retinoic acid1960
isobutyric acid-
1894 Jrnl. Chem. Soc. 66 532 The methyl salts of the lower natural naphthenic acids were prepared and fractionated with a view to isolate the methyl salt of heptanaphthenic acid (hexahydrobenzoic acid).
1932 Jrnl. Amer. Chem. Soc. 54 240 We observed that naphthenic acids are formed when linoleic acid is cracked under pressure.
1942 Chem. Rev. 30 100 The mixture of acids now known as naphthenic acid.
1966 McGraw-Hill Encycl. Chem. Technol. X. 47/2 Naphthenic acid production is about 16,000,000 lb annually.
1996 Environmental Toxicol. & Chem. 15 1482 The acute toxicity of wastewater generated during the extraction of bitumen from oil sands is believed to be due to naphthenic acids.
2. Of, relating to, or containing naphthenes.
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the world > matter > chemistry > organic chemistry > hydrocarbons > [adjective] > other hydrocarbons
naphthenic1931
alternant1947
adamantoid1973
1931 Engineering 2 Jan. 1/2 Cyclohexane, a hydrocarbon of the naphthenic series.
1969 Sci. Jrnl. Nov. 32/2 The basic structure of bitumen is that of clusters of naphthenic and aromatic rings... It is called a naphthenic crude oil.
1974 Sci. Amer. Dec. 7 (advt.) Up to this point, the best traction drive lubricants were naphthenic oils.
1989 Proc. Royal Soc. A. 423 236 The higher molecular weight constituents are composed of flat condensed naphthenic and aromatic ring structures with peripheral paraffinic side chains.
This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).
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adj.1894