What material is suitable for the distillation column in hydroxyphenylacetone production plants?
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Dear experts, is there anyone familiar with the same process used for p-hydroxyphenylacetic acid? I need advice on the material selection for the distillation tower equipment. The main substances involved are acetic acid, acetic anhydride, phenyl acetate, and phenol. The operating temperature is 120°C, while the operating pressure is -0.09 Mpa. We have initially considered using an enamel-coated tower; please provide your guidance.
For distillation columns for p-hydroxyphenylacetone that contain chemicals such as acetic acid and acetic anhydride, enamel material is indeed a viable option, as it possesses excellent resistance to chemical corrosion. However, considering the operating pressure and temperature, it is necessary to ensure the integrity of the enamel coating to prevent cracking of the enamel due to pressure or temperature fluctuations during operation. In addition, stainless steel materials such as 316L stainless steel can also be considered. 316L stainless steel boasts excellent corrosion resistance and higher mechanical strength, making it particularly suitable for environments with certain pressures and high temperatures; it is also easier to maintain and repair. In summary, when selecting the material for a distillation tower, factors such as the corrosivity of the medium, operating conditions (temperature, pressure), and subsequent maintenance costs should be considered comprehensively. It is recommended to conduct more in-depth corrosion resistance tests on the materials, or to consult professional chemical equipment manufacturers for more detailed advice. .