Re: Blue crystals in sugar wash?
- View Source--- I'm pretty good with the cleaning after every event. I don't smell
any ammonia. I'll filter them out and add to the next tail batch. Live
In email@example.com, "jamesonbeam1" <jamesonbeam1@...>
> First thing - clean your whole dang still out, condenser and all.....
> Next, take that blue distillate and add some of it to your next
> distillation run. May want to add some acid to it also to get the pH
> down - and see what happens.
> Next time dont add nutrients to a Turbo Yeast - they already have
> em..... [;)]
> Vino es Veritas,
> --- In firstname.lastname@example.org, "Mike" <maw56b@> wrote:
> --- Thanks as always. So what should I do for this batch?
> > In email@example.com, "jamesonbeam1" jamesonbeam1@
> > wrote:
> Usually the result of too much nitrogen / nutrients in too alkaline a
> wash / mash which results in blueish distillate and blue crystals in
> your condenser and tubing as a reaction from the copper - cuprammonium
> hydroxide or commonly called Schweitzer's reagent. See Below.
> Vino es Veritas,
> Blue Spirit
> Sometimes the spirit may get a slight blue tinge to it. This is usually
> a sign that you've used too much nutrient in the wash. Mike explains ...
> I [previously] replied, saying it was probably due to copper salts
> coming from acid wash. I WAS WRONG!!!!
> In fact, I've learned that it is just the opposite! Acid washes do not
> corrode the condenser (unless, perhaps, they've been allowed to sit far
> to long and have gone acetic), but neutral to alkaline ones DO. Heating
> an ALKALINE wash, particularly one with lots of nitrogen-containing
> compounds that have been put in as nutrients, liberates ammonia, which
> corrodes the heck out of reflux coils and dyes the distillate a distinct
> greenish blue.
> The Upshot: if the WASH is turning blue, it's probably due to acid wash
> corroding a copper sheathed element or a copper boiler, but if the
> collected DISTILLATE is blue, (and probably ammoniacal, but not always),
> the wash should be acidified!
> Turbos contain a lot of nitrogen-containing compounds, and at neutral to
> high pH, these can liberate free ammonia. At low pH, they are bound up
> with the acid as salts, and do not liberate ammonia. So, by adding
> nutrients to an already nutrient rich turbo, you can inadvertently push
> the mix over the line and get ammonia with your distillate.
> Mike warns though ..
> It's OK to add baking soda or other alkali to a STRIPPED wash, but NEVER
> put it in the primary ferment and then distill. If you do, and your
> still contains ANY copper, you will severely corrode the copper, and get
> blue, ammonia-smelling distillate. Not fun!
> Why? Yeast and yeast nutrient both contain lots of ammonium salts (like
> DAP), which are very stable under acidic conditions, but which release
> lots of ammonia as the approach neutral conditions. Actually, you will
> start getting ammonia at about pH 5! Ammonia gas is very corrosive to
> copper, and you will find your condenser coil packed up with blue
> crystals after such a run (and blue alcohol too !)
> Schweitzer's reagent is cuprammonium hydroxide, and is formed when
> copper hydroxide dissolves in a dilute ammonia solution). It is a deep
> blue colour, and is particularly known for its ability to dissolve
> cotton. The chemist who first discovered this property was Eduard
> Mathias Schweizer (1818 -1860), so it seems that it should really be
> called Schweizer's reagent.
> It forms in stills when ammonia released from alkaline washes (nitrogen
> source may be plant material or yeasts) reacts with copper hydroxide
> formed by the action of steam on copper oxides coating the inside of
> copper columns or components. It may be avoided by ensuring that the
> liquid in the boiler is slightly acid (pH less than 7).
> --- In firstname.lastname@example.org
> 6cFWJXozyq> , "Mike" <maw56b@> wrote:
> > Blue crystal have formed in a first run wash. what is it and why?
> > Thanks guys.