SOP of Solid Reversion Bed change over in Hydrogen Peroxide Plant

In Hydrogen Peroxide Plant, Activated Alumina is used in solid reversion bed for converting inactive quinone to active quinine. There are 2 solid reversion beds. They should be changed over by maintaining the following Standard Operation Procedure (SOP)-

1. Stop the reversion heater and cut off hydrogenated flow (Normally it is maintained by 7-8% of working solution loop flow) from old bed.
2. Line up the oxidized flow through the old bed and line up the reversion heater. Continue oxidized flow for 10 hours. Flow should be maintained between 3 and 4 m³ / hr. The temperature should be maintained at 50⁰C.
3. After 10 hours, stop the reversion heater and cut off the oxidized flow and isolate reversion bed from system.
4. Send working solution from old bed to new bed by nitrogen (N₂) pressure as much as possible.
5. Send remaining working solution from old bed to preparation tank by N₂ pressure.
6. Line up the hydrogenated flow through the new bed and line up the reversion heater. Flow should be maintained between 3 and 4 m³ / hr initially and it can be increased gradually up to 7-8% of total flow as required. The temperature should be maintained at 72⁰C.
7. Line up reversion cooler.
8. Start steaming through old bed from top to bottom and collect the working solution into preparation tank via reversion cooler. Steaming is usually done for long time until the fresh condensate comes out.
9. Stop steaming and cool down the old bed by N₂ pressure.
10. Empty the old bed, clean it with water and fill it with new activated alumina.

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