On Sun, 15 Feb 2009 00:19:48 +0700, Bruce in Bangkok
wrote:

Lets put it this way. The propane that the gas plant I installed in
Central Java had an odor. The same people that built our plant were
installing a "deodorized propane" plant in Alabama. I asked them what
"deodorized propane was used for and they told me that it was aerosol
propellant. Now, if propane has no odor then obviously the gas plant
people were getting about two million dollars for nothing.

Propane has no odor, and if it did you couldn't remove it. It's a
compound not a mixture.
Some natural gas, the source of propane, contains hydrogen sulfide,
some doesn't. It burns well and and they may leave it in fuel gas. I
don't know if it is likely to end up in the propane, or not. H2S boils
at -85 C, and propane boils at -42. I think they liquify it and
distill off the methane and ethane, which the sell as natural gas,
leaving LP gas which everyone loosely calls propane. They may or may
not remove the butane for separate use,[mostly synthesis feedstock].

Casady