Apparatus for alternately evacuating

Fig. 1. Apparatus for alternately evacuating and introducing nitrogen into the...

Aniline, 2,6-dinitro-, 31, 45 Aniline hydrochloride, 30, 5, 6 -Anisidine hydrochloride, 31, 12 Anthracene, 30, 1 31, 78 Anthracene, 9-nitro-, 31, 77 Anthranilic acid, 31, 96 32, 9 Anthraquinone, 31, 79 Apparatus, for alternately evacuating and introducing nitrogen, 30, 19 for continuous return of heavy liquid, 32, 82... 

The bottle is connected to the hydrogenation apparatus and alternately evacuated and filled with hydrogen twice. Hydrogen is then admitted to the system until the pressure gauge reads 40 lb. The shaker is started, and the pressure drops to the theoretical value for absorption of 0.6 mole in 15-20 minutes beyond this point shaking causes no further absorption of hydrogen (Note 2). The bottle is removed and the nickel catalyst is allowed to settle. The tetrahydropyrane is decanted, but enough... 

Pyrolysis of Asphaltenes. Pyrolyses were performed using the apparatus shown in Figure 1.(5) The appropriate material was placed in a quartz tube with 24/40 ground joints and a dry ice condenser was attached. After alternately evacuating and flushing with nitrogen several times, the material was pyrolyzed at the appropriate temperature for 10 min. Char and liquid yields were calculated from the weights of the pyrolysis tubes and condensers before and after reaction. 

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