Do you have any questions about acetic acid design? ? ?
Thread Content
Nowadays, acetic acid technology at home and abroad is relatively mature. I would like to know the main process flow of gas production in acetic acid plants, and under what circumstances should special zirconium materials be used in pipelines? How to control the temperature and pressure of the reactor, please share your thoughts. Looking forward to recovery.
When the pipeline carries high temperature and highly corrosive mother liquor, zirconium material is used, and the temperature control is relatively simple using a heat exchanger.
The main reason for using special material zirconium is because zirconium material has strong corrosion resistance at high temperatures, but zirconium material is somewhat insufficient in hardness, so multi-layer composite type is generally used! Temperature control mainly uses heat exchangers, and pressure control mainly pays attention to the venting amount.
For highly corrosive mother liquors, high temperatures, and high water, zirconium materials must be used. If the water content can be reduced to less than 5%, zirconium materials may not be used. Many data suggest the use of Hastelloy. It is recommended to check the relevant data. Furthermore, when operating the bottom water, the hydrogen ion concentration is small, and lithium ions must be added to increase the polarization ability of the mother liquor. At the same time, more iodide is added to increase the oxidation of the mother liquor.