The Frasch process Flashcards
1
Q
What are some sources of sulfur?
A
- Volcanic areas and craters
- It is produced as a by-product of the petrochemical industry(e.g. removed from gasolene before it is sold)
- Minerals such as iron pyrite
2
Q
How is sulfur mined from volcanic craters?
A
Frasch process
3
Q
Three concentric tubes are inserted into the sulfur deposit. What happens first?
A
Very hot water (165 degrees celcius) is forced into the deposit through the outermost tube
4
Q
What does the hot water pumped into the sulfur deposit do?
A
It melts the sulfur, causing it to flow into the middle tube
5
Q
Why can’t water pressure force sulfur onto the surface?
A
Molten sulfur is more dense than water
6
Q
How is sulfur forced onto the surface?
A
Hot compressed air is forced through the innermost tube.
7
Q
What are some(7) properties of sulfur?
A
- Pale yellow
- Brittle solid
- Tasteless
- Odourless
- Bad conductor of electricity
- Insoluble in water
- Reacts with most metals(not gold and platinum)
8
Q
What are some(3) uses of sufur dioxide?
A
- Used as a bleach in the manufacture of wood pulp for paper
- As a food preservative by killing bacteria e.g. in wine
