Demeth.

[Oilybloke]

My new processor is taking ages to demeth......I am just demething the bio & any glyc from the 2nd stage, @ 75c via a quad core condenser with chilled water pumped through. It's taking about 8 hours, is this normal?

[Head Womble]

Take the temp up to around 85°C and it'll be a lot quicker,
but 8hrs suggests you have a problem that's more than temp related,
is your venturi sucking properly ?

[Jamesrl]

It's taking about 8 hours, is this normal?

WHAT! Bio only should take no more than an hour or so. There's something wrong somewhere. AS wombles say's the temp is too low, wind it up to 85 - 90C.

How far open do you have the Venturi recirc. valve.

[Oilybloke]

Thank you both. The venturi at least appears to work well, it takes under a minute to suck in 20 litres of methoxide. I am opening the recirc valve fully.

[Julian]

Mine takes ages circa 3-4 hours to get to stoichiometric or just above.  Always has.  I have a four port venturi, two pumps, all be they small ones and it still takes ages.

I've just learned to live with it!