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Fig. 4. Isotherms of surface tension 
of water solutions of novel foaming 
agent: 1 - PТ-6; 2 - АТ-3; 3– PТ-7; 
4 - АТ-4; 5 - Т-92. 
Fig. 5. Kinetics of liquid emission at 
foam destruction in 1%-solutions of 
foaming agent: 1- PТ-6, 2- АТ-3, 3- 
PТ-7, 4- АТ-4. 
The foaming ability of foaming agents and foams properties.
In the same row 
as the surface activity of them (Fig. 5) foaming ability of surfactants increases, at 
the same row from PT-6 to the AT-4, and rise of surfactant activity them (Fig. 6 ). 
In accordance with changes foaming abilities of surfactants, as well as stability 
generated in their solutions foams are changed. Foam formed by AT- 4 reagent 
have relatively greater stability in time and relatively lower is PT-6 (Fig. 7).
Fig. 6. Foam generation in the time 
in the 1% solutions: 1 - PТ-6, 2 – 
АТ-3, 3 – PТ-7, 4 - АТ-4, 5 - Т-92. 
Fig. 7. Kinetics of liquid emission 
from foam in 1% solution of 
surfactants: 1- PТ-6, 2- АТ-3, 3- PТ-
7, 4- АТ-4. 
5 10 15 20 25 30 35 40 45 
0,5 
2 
4 
6 
8 
10 
12 
14 
18
0 
16
0 
14
0 
12
0 
100 
80 
60 
40 
V , foam
ml 
V liquid, 
 ml 
τ, sec 
2 
1 
3 4 
1 
2 
3 
4 
5 
5 
10 
15 
20 
25 30 
40
0 
60
0 
80 
100 
120 
140 
160 
V, ml 
τ, sec 

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Foam formed by PT-7, AT-3, have an intermediate position according to this 
characteristic. Foaming ability of synthesized surfactants depends on the ratio of 
«the mass of alcohol to the weight of aldehyde» synthesis reagents of surfactants, 
and interaction time of the components of the synthesis. For studied foaming 
agents PT-6, PT-7, AT-3 and AT-4, it increased in the mass ratio of from 1: 3 to 1: 
4, so the duration of the interaction is from 3 to 6 h. Change foaming of surfactants 
and foams stability correlates with behavior of adsorption at the interface: water-
air. Comparing of adsorption isotherms with dependencies foaming and foam 
stability shows that the sequence of adsorption value growth of the nature of the 
foaming agent and its concentration, determines the foaming capacity of the 
reagents and the stability of the foams formed by them. That indicates that it is the 
adsorption of surfactants molecules and their layers determine the foams’ 
properties: the adsorption value of the nature of the foaming agent is not changed.
The dependence of the volume of foam in surfactants solutions from pH and 
temperature was studied. The dependence of foam amount in 1% solutions of 
surfactants from pH. It was viewed that in solutions of surfactants generation of 
foam is enhanced with increasing pH; particularly strong from pH 4 and to pH 10. 
This fact indicates that surfactants on the foaming properties meet the requirements 
for flotation conditions of Cu-Mo ores. The volume of generated foam in the 
solution of surfactants increases with the duration rising of the surfactants 
synthesis and mass fraction of alcohol containing component in the mixture. The 
volume of foam increased similarly in the solutions of surfactants with increasing 
of temperature from 20 to 70 ºC, they rose in 2.0-2.5 times that can be associated 
with improvement solubility of the surfactants (Fig. 8). 
According to the parameter «foam ratio» for 30 sec, surfactants are 
differenced: the PT-7, AT-3 and AT-4 generate better foams (Fig. 9).