fp? wy 
| 
4 
a 
: ieee 
_ Substance 
(* fluid under water at 100°) 
Temperature 
at 760 mm. 
*Benzoic acid. . 
*Phenylacetic acid 
* 3-Phenylpropionic acid 
~ *9-Toluic acid . 
p- peas |) 
i Tole a Soc. 117 (1920), 396. 
* Akad. 118 ne) IIb, 695; and eh from BER in author’ s 
The process then « 
ee A fant ual 
(pe ” ” ° 
r-Hydroxybenzoic acid 
m- ” 
p- ” 
0:3- -Hydroxytoluic 
074- ” 
0:5- 
—m:4- ‘4 
pi 3- ” 
o-Nitrobenzoic 
*m- ;: 
p- be. as 
o-Chlorobenzoic 
m- i 
” 
100.12° 
100.160 
100.100 
101.06° 
100.91° 
ht 
In the mentioning of the ay 
“The book honciwdes with a small Sie ion! of practical tal 
distillation purposes. Deae ae 
In addition, a halt pracHiear half ieebretical work | ot N V. . 
mentioned. He investigated the volatility of several organic acids 
in the steam current, and made use of the figures obtained in tit 
he determining the vapour pressure of the substance in’ questio 
reproduced in the following abstract. 
f- 
Weight- 
percentage © 
of acid 
in distillate 
1.006 
0.294 
0.247 
0.964 
0.604 
ea 07-5 ee 
0.400. 
0.0015 
0.0003. 
0.261 
0.135. 
0.202 
0.0196 
0.0008 
0.0246 
0.0085 — 
0.0017 
0.206 
0.225 — 
0.0515 
~ 4) Partly as per ee 
Vapour 
pressure | 
in mm. X 10? | 
Sok 
in weight- 
percentages’ : 
4290 5) 810; 
(20.55 / V5 qe. 
DO Oi ten aaa 
97.0 | (297- 
60:7 ie 1,98 
2°05 6) wal a ge 
a eae tevaa cS) 9 
0.149, | : 36.9. 
0.030 1: mac 
Bai5i 2 116 
124 0.94 
18.29), slay 2a 
1.76 | 2) ASB ae 
0,072 aa: : 
2.01 92.8 
070-1 40a 
0.096 |) 029 | 
"98,03, "\n5 Ae 
19.70 Wes 
$a 4.50" ees O11 
ee 
