ACID CORROSION INHIBITOR PREPARATION Russian patent published in 2004 - IPC

Abstract RU 2237110 C2

FIELD: corrosion protection.

SUBSTANCE: invention relates to protecting metals against corrosion in acid, aqueous-salt, and hydrogen chloride-containing media, more particularly acid corrosion inhibitors based on polyamines and benzyl chloride to be applied in chemical and oil-and-gas production industries as well as in metallurgy and power engineering with different types of acid processing of products, equipment, and during transportation of acids. Method is implemented by reaction of acyclic and cyclic di- and polyamines with ethylene and propylene groups alternating between nitrogen atoms, or mixed ethylene or propylene groups, with benzyl chloride at 50-70^оС in alcohol medium in presence of 20-30% hydrochloric acid solution during a period of time 4-6 h. Inhibitor may further contain 5 to 30% urotropin.

EFFECT: increased yield of inhibitor and enhanced metal corrosion protection efficiency.

4 cl, 1 tbl, 33 ex

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RU 2 237 110 C2

Authors

Zagidullin R.N.

Dmitriev Ju.K.

Akhmadeeva G.I.

Kurgaeva S.N.

Asfandijarov L.Kh.

Dates

2004-09-27—Published

2002-10-25—Filed