File:Image from page 58 of "Practical methods of organic chemistry" (1901) (14748621046).jpg
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DescriptionImage from page 58 of "Practical methods of organic chemistry" (1901) (14748621046).jpg |
Identifier: practicalmethods00gatt Title: Practical methods of organic chemistry Year: 1901 (1900s) Authors: Gattemann, Ludwig. [from old catalog] Subjects: Publisher: [n.p.] Contributing Library: The Library of Congress Digitizing Sponsor: The Library of Congress
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Text Appearing After Image: 40 GENERAL PART shaken up with ether, the ether decanted and evaporated. If noresidue remains, the distillation is finished. When a substanceshows a colour reaction, e.g. aniline with bleaching powder,advantage is taken of this to decide the question. After thedistillation is ended the rubber tubing is first removed from thedistilling flask, and then, after this has been done, the flame underthe generator is extinguished. This point is also carefully ob-served when the distillation is interrupted; otherwise it mayhappen that the contents of the flask will be drawn back intothe generator. Superheated Steam. — In dealing with very difficultly volatilecompounds, it is frequently necessary to conduct the distillationwith the aid of superheated steam. A conically wound coppertube is interposed between the steam generator and the distilling
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Source | Image from page 58 of "Practical methods of organic chemistry" (1901) |
Author | Internet Archive Book Images |
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