POLY ELECTROLITE

POLY ELECTROLITE

Polyelectrolytes are water-soluble polymers carrying ionic charge along the polymer chain. Depending upon the charge, these polymers are anionic or cationic. Polyelectrolytes are available in a wide range of molecular weights and charge densities. Homo polymers of acrylamide are also included in the family of polyelectrolytes though they do not carry any charge. These are called nonionic. Polyelectrolytes have got a wide range of applications right from water purification, oil recovery, colour removal, paper making, mineral processing, etc. Polyelectrolytes are both flocculants as well as de­flocculants depending upon the molecular weight. A flocculant is essentially a solid liquid separating agent while a de­flocculant is a dispersing agent.


Cationic Polyelectrolyte Powder:
Appearance Powder
Ionic Character (Cationic) low cationic
Use concentration suggested (g/l) 0.5
Concentration of Stock Solution (g/l) 3 - 5
Stock Solution Viscosity (cps) @5 gpl 300 – 600

Benefits

Rapid settling. Marked increase in underflow density
High filtration rate Increased throughput
Improved filter clarity Efficient filter cake washing.

Features

  • Effective at low dosages
  • Easy to prepare solution and apply
  • Completely miscible with water

Anionic Polyelectrolyte Powder :
Major Contents Polyacrylamide
Ionicity Medium Anionic
Shape White granules
Bulk Density 0.7
Dissolution conc 0.05 -0.20
Effective pH range 5 – 12
Aqueous Solution pH (0.1%) 6 – 8
Molecular Weight (x104) 1900
Viscosity 0.1% 280
Viscosity 0.2% 450
Application mining, coal washing, metal processing, etc

NON IONIC POLYELECTROLYTE POWDER :

They are used for the same purpose with anionic polyelectrolytes ; however , nonionic polyelectrolytes do not consist of charged polymer structures whereas anionic and cationic polyelectrolytes do. They are chargeless polyelectrolytes and able to perform better than the other type of polyelectrolytes when water composition is compatible with them.

  • Chemical composition :Polyacrylamide
  • Appearance :White Granule
  • Ionicity :Nonionic
  • Bulk Density ( gr / ml ) :0.55 ~ 0.65
  • pH of solution ( 250C ) :0.1%5.5 ~ 6.5
Advantages:

Economical to use- Effective at very low dosage levels, resulting in reduced handling and storage cost.

Works over a wide pH range and does not alter pH in the system.

Larger, faster-settling flocs are formed in gravity settling operations.

Increased filtration rates and drier cakes are produced in filtration processes. Sludges contain less ash when incinerated.

Higher solids capture, increased clarity, and greater throughput are attained in centrifugation.

Air flotation operations produce clearer underflows and grater throughput.