Purify sulfuric acid

[bordello]

I want to purify my 50% sulfuric acid. I want to reduce the water. What should i do, simply boil it to 90-100 degrees Celsius ?

 

[WillD]

For what purpose do you need acid?

 

[bordello]

For what purpose do you need acid?

WillDSulfuric acid to produce Amphetamin Form Oil. Not for harmful reasons

 

[FENTAMAS]

Pour your 50% H2SO4 acid to the large borosilicate beaker (not more than half), wrap with aluminum foil and heat on electric hotplate till the volume reduced to the half of the initial size or white fumes become visible. You get around 75-80%. Temperature of the mixture will be over 200 *C
If you want 98% you should heat you 80% acid in round bottom flask at 350-400 C (outer temperature) to distill off all water. Use air condenser or just long tube. Don't use water cooling. Don't use vacuum.