Introduction to the Preparation of Organic Compounds
The book Introduction to the Preparation of Organic Compounds was written by author Emil Fischer Here you can read free online of Introduction to the Preparation of Organic Compounds book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Introduction to the Preparation of Organic Compounds a good or bad book?
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The conversion is accompanied by a change of colour from black to light grey. It is complete when no more steam is evolved. The tube is then heated to 180-190 in a suitable furnace (e. G. A Volhard petroleum furnace, fig. 15), and a slow stream of dry hydrogen is led through, trockener WasserstoK FIG. 15. which on the way has passed through a vessel containing about 30 c. C. Of benzene. The hexa- hydrobenzene formed condenses in the ice- cooled receiver. The stream of hydrogen should not exceed... 100 c. C. Per minute. In order to shorten the operation, the benzene may be warmed to 30. After about 7 hours the process is stopped. The benzene which has not been volatilised is weighed, and the ORGANIC COMPOUNDS 71 distillate, which contains some benzene, is treated with a nitrating mixture of sulphuric and nitric acids. The oil is separated from the heavier acid, washed with water, and dried over calcium chloride. On fractionating, hexa- hydrobenzene passes over at 80-82. Yield at least 80 % of the benzene volatilised.
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