酯化高酸原油的腐蚀性研究

研究了石油酸酯和酯化高酸原油的热稳定性及腐蚀性规律。结果表明，石油酸酯在高温下会发生一定的分解，但石油酸经酯化后可有效抑制腐蚀，缓蚀率达95%以上；酯化降酸抑制腐蚀的程度与酯化高酸原油中金属羧酸盐含量有关，通过脱除原油中的金属羧酸盐及采用稳定的非均相催化剂，可降低石油酸酯分解反应速率，达到抑制腐蚀的目的。

STUDY ON THE CORROSION OF ESTERIFIED HIGH ACID CRUDE OIL

The thermal stability and corrosion behaviour of petroleum acid ester and esterified high acid crude oil (HACO) were studied. Results showed that the petroleum acid ester could be decomposed at high temperature; the esterification of petroleum acid could restrain the corrosion of petroleum acid and a corrosion inhibition rate of over 95% was obtained. The corrosion behaviour of esterified HACO was relevant to the metal carboxylate content in crude oil. The decomposition rate of petroleum acid ester could be reduced by removing metal carboxylate from crude oil and using a stable heterogeneous catalyst, and thus corrosion could be suppressed.