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Study on synthesis and inhibition performance of PASP

Zeng De-fang

Open publisher page 6 citations

Abstract

The molecular-weight of the poly-aspartic acid which is synthesized with urea and maleic anhydride can reach about 13 000,the best conditions of reaction as follows:the mole ratio of maleic anhydride to urea is 1 ∶0.7;reaction temperature is 200 ℃;reaction time is 3 h;catalyst is the mixed acid of sulfuric acid and phosphoric acid which ratio is 1 ∶1,the mass ratio of maleic anhydride to the catalyst is 1 ∶0.15.By means of this product associated with ATMPS,when the total quality concentration is 15 mg/L,the corrosion rate of 20# steel can achieve the status of 0.055 mm/a.

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What this paper is about

The molecular-weight of the poly-aspartic acid which is synthesized with urea and maleic anhydride can reach about 13 000,the best conditions of reaction as follows:the mole ratio of maleic anhydride to urea is 1 ∶0.7;reaction temperature is 200 ℃;reaction time is 3 h;catalyst is the mixed acid of sulfuric acid and phosphoric acid which ratio is 1 ∶1,the mass ratio of maleic anhydride to the catalyst is 1 ∶0.15.By means of this product associated with ATMPS,when the total quality concentration is 15 mg/L,the corrosion rate of 20# steel can achieve the status of 0.055 mm/a.

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Available abstract

The molecular-weight of the poly-aspartic acid which is synthesized with urea and maleic anhydride can reach about 13 000,the best conditions of reaction as follows:the mole ratio of maleic anhydride to urea is 1 ∶0.7;reaction temperature is 200 ℃;reaction time is 3 h;catalyst is the mixed acid of sulfuric acid and phosphoric acid which ratio is 1 ∶1,the mass ratio of maleic anhydride to the catalyst is 1 ∶0.15.By means of this product associated with ATMPS,when the total quality concentration is 15 mg/L,the corrosion rate of 20# steel can achieve the status of 0.055 mm/a.

Key concepts: Maleic anhydride, Catalysis, Phosphoric acid, Urea, Chemistry, Sulfuric acid, Maleic acid, Organic chemistry

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