The amphoteric polyacrylamide (PAM) produced
by our Company under the trade name of LHPAM, is made from acrylic
cationic monomer, acrylamide monomer and a hydrolyzing agent through
a copolymerization process. Through infra-red sqectrum analysis,
it is shown that the molecular chain of the product has not only
carboxyl anionic charges resultion from the hydrolysis of acrylamide,
but also cationic charges from the acrylic monomer. Thus, it is
an amphoteric random polymer with both positive and negative charges
on its molecule.
Type
and Characteristics of Non-Ionic Polymers
Tradename
|
Molecular
Weightx106
|
Cationicity
(%)
|
Anionicity
(%)
|
Solids
Content(%)
|
Residual
Monomer(%)
|
Applicable
pH
|
Appearance
|
LHPAM-1
|
4-6
|
5
|
8-12
|
90
|
0.03
|
1-14
|
White
Powder
|
LHPAM-2
|
3-4
|
20
|
15
|
90
|
0.03
|
1-14
|
White
Powder
|
LHPAM-3
|
1-2
|
30
|
15
|
90
|
0.03
|
1-14
|
White
Powder
|
Note: LHPAM
series products have 20-80 mesh grain size. Under room temperature
and at a concentration of 0.05-0.1%, it takes about 40 minutes to
dissolve in water. The packaging is in 25kg bags. The bag material
is double-layered, with an outer layer of woven plastic and an inner
sheet plastic layer.
Main
Applications:
1. LHPAM-1
is a newly-developed product by our company, specially applicable
to profile modification and water blocking in the oilfield. Many
filed trials have shown this polymer to have better performance
than mono-ionic ones.
2. LHPAM-2
is a brand new flocculant for water treatment. In many cases when
treating waste water or raw water, anionic PAM combined with cationic
PAM has outstanding synergetic effects over a mono-ionic PAM alone.
For example, the ability of LHPAM-2 to lower surface tension is
stronger than cationic or anionic PAM alone under the same conditions.
Therefore, to reach the required low surface tension, it is usually
necessary to use cationic and anionic PAM at the same time. However,
if cationic and anionic PAM are not used in the proper way, they
will react with each other and precipitate, causing poor performance.
LHPAM-2 amphoteric nature creates the compatibility and synergetic
effect of anionic and cationic polymers without the risk of precipitation.
Particularly, when the water composition is quite complicated, or
the composition changes frequently, it is more convenient and effective
to use LHPAM-2 as a water treating flocculant.
3. LHPAM-3
as a sludge de-watering agent. Since the composition of municipal
waste water is becoming more and more complicated, higher performance
is required from sludge dewatering agents. Sometimes cationic PAM
is not suitable for certain sludge de-watering applications. For
these cases our company has developed a new amphoteric sludge dewatering
agent, LHPAM-3. Through numerous sludge de-watering tests on different
kinds of sludge, it was shown that LHPAM-3 gave better results then
mono-ionic PAM. In particular, our amphoteric PAM gives outstanding
results in the de-watering of sludge from refineries and chemical
works.
|