What about a decline?
Thread Content
This post was last edited by alibaba123 on 2011-12-8 at 19:33. Why is it decreasing? Everyone, please help me explain this.
Reply to 1# alibaba123: The reaction time between phosphoric acid and sulfuric acid needs to be appropriate; if it is too short, a complete reaction does not occur, while if it is too long, encapsulation occurs which reduces the conversion rate of phosphoric acid.
This post was last edited and replied to by alibaba123 on 2011-12-8 at 19:33 under 2# mars1981
Are you working with experimental data in the laboratory? If that’s the case, I have an explanation: it might be an analysis bias.
This post was last edited by alibaba123 on 2011-12-8 at 19:32. Reply to 4# Youlong2011: It’s laboratory data
The analysis deviation may be caused by intergranular loss in phosphogypsum.
I suggest you take another look at the books on phosphoric acid and ammonium phosphate; they contain specific explanations.
It won’t decrease; the reason is likely that the person who made the analysis wasn’t using the same sample – they probably made the comparison under dynamic conditions. When comparing under dynamic conditions, the reaction time increases, and other parameters also change, such as the sulfur trioxide concentration, feeding rate, temperature, etc.; any change in one of these factors results in a different extraction efficiency.