Artificial dye-stuffs; their nature, manufacture, and uses (1917)
Ramsey, Albert R. J, Weston, H. Claude (Hubert Claude) · London, Routledge; New York, Dutton · leaf 34
distilled in four fractions according to the tempera-tures at which they boil. The first fraction, containingoils boiling up to 170° C, is known as the Light oilfraction ; the second, or Middle oil, fraction boils up to230° C. ; the third, or Heavy oil fraction, boils, up to270° C. ; and the fourth… … 20 COAL AND CO.AL-TAR the tar comes over; and when the temperature rises tothe degrees mentioned the receiver is changed and thevarious fractions kept separate. Instead of changingthe receiver, the condensing worm may be arranged toempty into a vessel provided with a number of outletpipes, provided…
Dyes and dyeing
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