【Daily Question】Chemical Engineering Principles 278: Mixed Bed (December 29)
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This post was last edited by Zaihui Kangqiao on 2016-1-14 at 17:53. The Chemical Engineering Theory section is launching a \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will cover topics such as \"Principles of Chemical Engineering,\" \"Mass Transfer and Separation,\" \"Thermodynamics in Chemical Engineering,\" and \"Chemical Process Engineering.\" We hope you will give it your active support! Wishing everyone a happy Christmas! Answers to the questions in the \"One Question per Day\" campaign can be viewed directly; the thread will be closed after 1 day ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: What is the purpose of introducing NaOH solution before regeneration after a mixed-bed unit stops working? Answer: The purpose of introducing NaOH is to regenerate the anion resin to the OH form and the cation resin to the Na form, thereby increasing the density difference between the anion and cation resins and facilitating separation. Additionally, it prevents the anion and cation resins from sticking to each other, which also aids in separation.
What is the purpose of introducing NaOH solution before regeneration after a mixed-bed fails? Answer: The purpose of introducing NaOH is to regenerate the anion resin to the OH form and the cation resin to the Na form, thereby increasing the density difference between the anion and cation resins and facilitating separation. Additionally, it prevents the anion and cation resins from sticking to each other, which also aids in separation.
What is the purpose of introducing NaOH solution before regeneration after a mixed-bed fails? Answer: The purpose of introducing NaOH is to regenerate the anion resin to the OH form and the cation resin to the Na form, thereby increasing the density difference between the anion and cation resins and facilitating separation. Additionally, it prevents the anion and cation resins from sticking to each other, which also aids in separation.
First, it can completely render the cation resin ineffective, resulting in an increase in the specific gravity of the cation resin； Secondly, it enables the anion resin to be regenerated, resulting in a reduced specific gravity of the anion resin. As the density difference between the cationic and anionic resins increases, this makes it easier for them to separate into layers.
What is the purpose of introducing NaOH solution before regeneration after a mixed-bed fails? First, it can completely render the cation resin ineffective, resulting in an increase in the specific gravity of the cation resin ； Second, it enables the anion resin to be regenerated, resulting in a reduced specific gravity of the anion resin. As the density difference between the cationic and anionic resins increases, this makes it easier for them to separate into layers.
What is the purpose of introducing NaOH solution before regeneration after a mixed-bed fails? Answer: The purpose of introducing NaOH is, first, to completely deactivate the cation resin, thereby increasing its specific gravity ； Secondly, it enables the anion resin to be regenerated, resulting in a reduced specific gravity of the anion resin. As the density difference between the cationic and anionic resins increases, this makes it easier for them to separate into layers.
After the mixed-bed fails and before regeneration, soaking it in NaOH solution serves to convert the anion resin back to the OH type and the cation resin back to the Na type, thereby increasing the density difference between the two types of resins and facilitating separation. Additionally, this process eliminates the sticking together of H-type and OH-type resins, which also helps with separation. Therefore, the key during this alkaline soaking step is to ensure that all the resins in the bed are thoroughly soaked and transformed.
The purpose of introducing NaOH is to regenerate the anion resin to the OH form and the cation resin to the Na form, thereby increasing the density difference between the anion and cation resins and facilitating separation. Additionally, it prevents the adhesion between H-form and OH-form resins, which also aids in separation.
The purpose of introducing NaOH is to regenerate the anion resin to the OH form and the cation resin to the Na form, thereby increasing the density difference between the anion and cation resins and facilitating separation. Additionally, it prevents the adhesion between H-form and OH-form resins, which also aids in separation.
What is the purpose of introducing NaOH solution before regeneration after a mixed-bed fails? The purpose of introducing NaOH is: 1. to completely deactivate the cation resin, thereby increasing its specific gravity ； 2. It can regenerate the anion resin, resulting in a reduced specific gravity of the anion resin. As the density difference between the cationic and anionic resins increases, this makes it easier for them to separate into layers.