. American journal of pharmacy. Here, to secure the maximum yield of acetone,the points to be attained are uniformity of temperature throughoutthe whole mass and slow heating to not over 300° C. The patenteeclaims that in the process of subjecting acetates in a closed vessel toheat applied externally to the vessel for distilling acetoue from theacetates, the desired slowness and uniformity of temperature may be 324 Manufacture of Chloroform. {Am;JS^\m&Tm secured by stirring the acetates so that all portions of the mass will besubjected to the heat resulting from direct contact with the bottom
. American journal of pharmacy. Here, to secure the maximum yield of acetone,the points to be attained are uniformity of temperature throughoutthe whole mass and slow heating to not over 300° C. The patenteeclaims that in the process of subjecting acetates in a closed vessel toheat applied externally to the vessel for distilling acetoue from theacetates, the desired slowness and uniformity of temperature may be 324 Manufacture of Chloroform. {Am;JS^\m&Tm secured by stirring the acetates so that all portions of the mass will besubjected to the heat resulting from direct contact with the bottom ofthe vessel and by admitting free steam from time to time into directcontact with the acetates in case of any undesirable rise in temperaturewithin the vessel. Fig. 2 shows the form of retort in which this is effected. It willbe seen mechanical agitation is provided for by the paddles whichrotate around the vertical central axis. Steam is admitted by one ofthe openings above, while the products of distillation pass off by. Fig. 2. another opening in the top of the retort. The crude acetone distillateso obtained while richer than before in real acetone still contains oilydistillation products and much water from condensed steam. In thisdilute state it is treated with milk of lime to remove the higher ke-tones and other compounds. It is then distilled from a large plainstill and the fractions rich in acetone passed to a column-still where itis rectified until it becomes almost if not quite anhydrous. In prac-tice, two column-still rectifications are carried out, one after the other,so that the pure acetone shows 99° or 100° by the alcoholometer. Itis now fitted for use in the direct manufacture of chloroform. The Am. Jour. , 1889. Manufacture of Chloroform. 325 process and form of apparatus for most successfully carrying out thischloroform manufacture constitute the subject of U. S. patent, ,992, also issued to G. Runipf, and assigned to Kcessler and Hass-lac
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Keywords: ., bookcentury1800, bookidamerica, booksubjectpharmacy, bookyear1835
