- Then add70 ml of sulphric acid+ Ag2 SO4 solution shake the flask while adding acid mixture.
- Waste water pretreatment system, PLC autocontrol of adding acid and alkali in chlor-alkali production were introduced.
- Under the condition of comm only used digestion method, the effect of the sequence of adding acid in the same acid system on the result of test is studied.
- The defects of adding acid technology in production of ammonium sulfate with saturator were pointed out and the improved way of adding acid technology was put forward.
- Through the analysis of principles and embodiments,it is concluded that whether to add acid to brine before its entering into the resin column should depend on the actualities.