metalresearcher
National Hazard
Posts: 731
Registered: 7-9-2010
Member Is Offline
Mood: Reactive
|
|
Making H2SO4 from gypsum and silica ?
| Quote: | On wiki I found
https://en.wikipedia.org/wiki/Calcium_sulfate#Other_uses
[quote=wikipedia]
Up to the 1970s, commercial quantities of sulfuric acid were produced in Whitehaven (Cumbria, UK) from anhydrous calcium sulfate. Upon being mixed
with shale or marl, and roasted, the sulfate liberates sulfur trioxide gas, a precursor in sulfuric acid production, the reaction also produces
calcium silicate, a mineral phase essential in cement clinker production.[14]
CaSO4 + SiO2 → CaSiO3 + SO3
|
Can we as amateurs make SO3 that way by just heating ordinart CaSO4 (e.g. crushed drywall) and silica sand ?
|
|
|
Maurice VD 37
Hazard to Self
Posts: 66
Registered: 31-12-2018
Member Is Offline
|
|
You may try. But the reaction occurs at a temperature that is usually not possible to get by amateurs (~1500°C).
|
|
|
macckone
International Hazard
Posts: 2159
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline
Mood: Electrical
|
|
You will get SO2 not SO3, SO3 decomposes at the temperature required.
Edit: the table on page 6 provides the partial pressures of SO2 and SO3 at various temperatures.
Attachment: Decomposition of Calcium Sulfate.pdf (3.3MB)
This file has been downloaded 252 times
[Edited on 24-8-2020 by macckone]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
