Knowing Hydrolyzed Polymaleic Anhydride (HPMA)

Hydrolyzed Polymaleic Anhydride (HPMA) is an organic aliphatic acid polymeride with molecular weight in the range of 400-800. HPMA is easily soluble in water, and possesses high chemical and thermal stability. Since its dissociation temperature is above 330 temperature, the product exhibits obvious threshold effects even under high temperature.Hydrolyzed Polymaleic Anhydride (HPMA)shows good scaling-prevention capability against carbonate and phosphate containing scales, and the effective time can be as ling as 100 hours. This products can be used together with the dewatering demulsifiers for crude oil.Furthermore, the products of the degradation are harmless to water lives as well as people and live-stocks.
HPMA is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers. HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, it can effectively inhibit carbon steel corrosion.Due to its good scale inhibition high temperature tolerance properties, HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, industrial circulating cool water systems. In addition, HPMA has good corrosion inhibition effect when used together with zinc salt. HPMA can also used as additives fcement.
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