Corrosion of an UNS S31803 distillation column for acetic acid recovery

被引：7
作者：
Colombo, A. [1 ]
Trasatti, S. P. [1 ]
机构：
[1] Univ Milan, Dept Chem, I-20133 Milan, Italy
来源：
ENGINEERING FAILURE ANALYSIS | 2015年 / 55卷
关键词：
Chemical-plant failure; Acetic acid corrosion; Failure analysis; Process-plant failure; DUPLEX STAINLESS-STEELS; NATURAL RAW-MATERIALS; CELLULOSE-ACETATE; BEHAVIOR; PERFORMANCE;
D O I：
10.1016/j.engfailanal.2015.07.017
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Unusually extended corrosion phenomena were detected in a distillation column, made of UNS S31803 duplex stainless steel, of a plant for the production of cellulose acetate. The process fluid was an aqueous solution of 80% acetic acid to separate by simple rectification. Corrosion was in the form of uniform attack mainly on downcomers and plates corresponding to the feedstock line. The phenomenon was a consequence of incomplete neutralization of sulphuric acid in the process fluid, used as a catalyst for the hydrolysis of esters. Controlled addition of H2O2 was proposed to solve the problem. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：317 / 326
页数：10
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