Eddygp - 31-3-2012 at 13:45
How can I make sulfuryl chloride?
I have been looking up for some chemicals and I have seen this is a good source of chlorine, so I decided to use this instead of other substances.
I have also been reading about methyl sulfoxide and, well, however, I would like to get a bit of this sulfuryl chloride.
watson.fawkes - 31-3-2012 at 14:19
This forum has a search engine. Use it. There are existing threads on this compound.
barley81 - 31-3-2012 at 15:25
There's a synthesis in Brauer (download from the library here). SO2 and Cl2 are reacted in the presence of camphor (catalyst). Activated carbon can
also be used as a catalyst.
AndersHoveland - 31-3-2012 at 20:27
Simply reacting SO2 and Cl2, completely free of any moisture, together in sunlight will form SO2Cl2.
An activated carbon catalyst can alternatively be used, and the reaction can suppossedly proceed at room temperature. These reactions will not be
instantaneous, probably taking several hours.
This could be an interesting way of making sulfuric acid, since SO2Cl2 reacts with water.
(the reaction may be somewhat complex such that pure 100% concentrated sulfuric acid is probably not obtainable)
[Edited on 1-4-2012 by AndersHoveland]
woelen - 2-4-2012 at 03:57
Making sulfuric acid through SO2Cl2 is an incredibly difficult way of making it. You don't need SO2Cl2 first, you can make H2SO4 directly from SO2,
Cl2 and water. Just dissolve SO2 in water (this works well, it easily dissolves) and bubble Cl2 through the solution of SO2. This makes H2SO4 and HCl,
both remain in solution. When the solution starts smelling of Cl2, again dissolve SO2 and repeat. In the final run assure that SO2 is present in
slight excess. Finally boil down the liquid to get higher concentration of H2SO4 and drive off HCl and any excess of SO2.
Making SO2Cl2 requires a catalyst (indeed camphor or activated carbon) if you want acceptable reaction rates.
AJKOER - 3-4-2012 at 21:18
Woelen:
I was wondering about treating H2SO3 with excess Cl2 and sunlight(?) as an additional aid in concentrating the H2SO4. My logic:
Cl2 + H2O <---> HOCl + HCl
where the HOCl is reacting with the H2SO3:
HOCl + H2SO3 --> H2SO4 + HCl
But with excess Chlorine and sunlight (after exhausting our SO2 source):
2 Cl2 + 2 H2O ----> 4 HCl + O2
effectively removing water, and then heat to drive off the HCl and concentrate as previously suggested.
Well, at least this is the theory, and depending on how much sunlight you get, a slower process.
woelen - 3-4-2012 at 22:25
This process does not work at all in practice. The reaction of Cl2 with water is slow and incomplete, even in the presence of sunlight. The solubility
of Cl2 in water also is not that good, it mostly will bubble through the water.
The reaction between SO2 and Cl2 in water is fast, very fast and does not need any help from sunlight or a catalyst.
rstar - 6-10-2012 at 09:10
does camphor react to form any side products in the reaction ?
tetrahedron - 6-10-2012 at 14:50
no but it makes it smell nice =)