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Hasil cari dari kata atau frase: crude petroleum (0.00827 detik)
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Definition: crude petroleum
(n[a^]f"th[.a] or n[a^]p"th[.a]), n. [L.
naphtha, Gr. na`fqa, fr.Ar. nafth, nifth.]
1. (Chem.) The complex mixture of volatile, liquid,
inflammable hydrocarbons, occurring naturally, and usually
called crude petroleum
, mineral oil
, or rock oil
Specifically: That portion of the distillate obtained in
the refinement of petroleum which is intermediate between
the lighter gasoline and the heavier benzine, and has a
specific gravity of about 0.7, -- used as a solvent for
varnishes, as a carburetant, illuminant, etc.
2. (Chem.) One of several volatile inflammable liquids
obtained by the distillation of certain carbonaceous
materials and resembling the naphtha from petroleum; as,
Boghead naphtha, from Boghead coal (obtained at Boghead,
Scotland); crude naphtha, or light oil, from coal tar;
wood naphtha, from wood, etc.
Note: This term was applied by the earlier chemical writers
to a number of volatile, strong smelling, inflammable
liquids, chiefly belonging to the ethers, as the
sulphate, nitrate, or acetate of ethyl. --Watts.
[NL., naphtha of vitriol] (Old Chem.),
common ethyl ether; -- formerly called sulphuric ether