. Journal of the New England Water Works Association . on by-product coke ovens. However, the tar available tothe distillers has not changed so largely as to its source, as the total figuresindicate, due to the rather wide adoption of tar burning on the part of manyof the by-product oven owners. Methods of Testing Tars. Before considering the characteristics of different types of Americantars it will be useful to illustrate and briefly describe some of the labora-tory tests ordinarily made on crude and refined tars and by means of whichwe identify and classify the crudes and control the consis
. Journal of the New England Water Works Association . on by-product coke ovens. However, the tar available tothe distillers has not changed so largely as to its source, as the total figuresindicate, due to the rather wide adoption of tar burning on the part of manyof the by-product oven owners. Methods of Testing Tars. Before considering the characteristics of different types of Americantars it will be useful to illustrate and briefly describe some of the labora-tory tests ordinarily made on crude and refined tars and by means of whichwe identify and classify the crudes and control the consistency of therefined tars and soft pitches. CHUECH. 5 i 3 DISTILLATION TEST. The apparatus illustrated in Fig. I is used for testing crude tar forwater and also for distilling tar to pitch and determining the per cent, oilyield. The oil and pitch obtained can be further examined if desired. No I Coppep St/ll £mall -S/ZF No 2 Ring Burner No 2 Conmectino Tube No 4 CohOEH3ER WITH Tubc No S SEPARATOR* FuHHEL No 6 THERMOMETER No 7 Hydrometer No 6 CYLINDER. AHT. 20412AHT 20420AHT Z04Z&AHT 20432*20436,AHT 2044OO 250°CSpecial I / No 7 kJ. Fig. I — Apparatus for Distillation. When water only is to be determined Crude Tar Tests-- Water. Apparatus. Copper still, 6 in. by 3| in. Ring burner to fit tube. Condenser trough. Condenser tube. Separatory fun-nel. Thermometer, 0°-250° C. See Fig. I. Method. Fifty cc. of coal tar naphtha or light oil shall be measured ina 250 cc. graduated cylinder, 200 cc. of the tar to lie tested shall be contents shall be transferred t the copper still, the cylinder shall bewashed Avith 100-150 cc. more of naphtha, and the washings added to thecontents of the still. The lid and clamp shall he attached, using a papergasket, and the apparatus set up as shown in Fig. II. The condensertrough shall he filled with water. Heat shall he applied by means of thering burner, and distillation continued until the vapor temperature hasreached 2
Size: 1892px × 1321px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidjournalofnew, bookyear1922
