Chemistry Reference
In-Depth Information
Table 5.5 Corrosion inhibition of some rosin-based cationic surfactants
Surfactants
Corrosion rate (mm/year)
Corrosion inhibition rate (%)
Blank
17.83
—
C15
0.25
98.6
C16
1.57
91.2
C17
0.30
98.3
C18
1.07
94.0
C19
0.48
97.5
C20
0.16
99.1
N02(p+q=6)
1.212
93.2
N02(p+q=10)
0.945
94.7
N02(p+q=15)
0.874
95.1
N02(p+q=20)
1.337
92.5
N03(n=4)
1.23
93.1
N03(n=6)
1.09
93.9
N03(n=9)
1.28
92.8
N03(n=14)
1.41
92.1
N03(n=16)
1.76
90.1
Benzalkonium
bromide
1.25
93.0
n, p and q are degrees of polymerisation
Data adapted from references [20, 28]
5.4.4 Chiral Catalyst
The majority of uses of rosin-based surfactants are in paper sizing agent, as a rubber
emulsifier and as antibacterial agents. The uses of diterpene resin acids as convenient
chiral pools for the synthesis of chiral ligands suitable for metallocomplex catalysts
of asymmetric reactions have been studied [68] but, so far, there have been few
applications in this field. The use of pine resin acids as chiral pools would also be
useful for the preparation of chiral surfactants.
