Petroleum Processing and Petrochemicals ›› 2020, Vol. 51 ›› Issue (5): 105-109.

Previous Articles    

PROPERTIES AND MECHANISM OF NON-PHOSPHORUS ORGANIC SCALE INHIBITORS

#br#   

  1.  
  • Received:2020-01-02 Revised:2020-01-21 Online:2020-05-12 Published:2020-05-28
  • Supported by:
     

Abstract: The scale inhibition properties and mechanism of three kinds of phosphate-free organic scale inhibitors, including carboxylate polymer, sulfonate polymer and polyether polymer, on calcium carbonate and calcium phosphate were reviewed from the relationship between structure and scale inhibition performance. The carboxylate chelates with the calcium ions on the surface of the calcium carbonate crystal, which distorts the calcium carbonate crystal into a loose structure and inhibits the scaling of calcium carbonate. The carboxylate is anchored to the surface of amorphous calcium phosphate nanoparticles by chelation, the sulfonate makes amorphous calcium phosphate negatively charged and disperses calcium phosphate scale, and the polyvinyl oxy chain increases the solubility of calcium phosphate. In this context, the directions of developing scale inhibitors were prospected.

Key words: non-phosphorus scale inhibitors, carboxylates, sulfonates, polyethers

CLC Number: