what is the purpose of a recovery pump? I have always made my wax by purging in a hi vac chamber until it was solvent free. what do these things do exactly? I think I'm lost. ..
that dudes retarded.
corrosion requires an oxidizing agent. hydrocarbons in general are poor... very poor oxidizing agents.
i suppose if your hydrcarbon were contaminated with water, you could see some corrosion, but it would occur verry slowly given that copper and brass usually form very good passivation layers...
the only exception to this is where galvanic conditions are allowed, or where the water passing over the copper is very acidic. in this case the acidic water will form cupric carbonate or cupric chloride or what ever the conjugate base of your acid is.
houses with old school leaded solder pipes typically only showed low single digit parts per million of lead... why? becaus that passivation layer makes the oxidation of lead procede very very slow.
his comparison of old moonshineers using car radiators is completely specious... as moonshiners were using water not hydrocarbons. water is a decent oxidizing agent, not a great one, but good enough to harm folks.
If you hear that recovery pumps with any copper, or that any other copper component of your CLS is poisoning your BHO, that's what you get for not slapping down the postulators of BS when they start spewing.
http://youtu.be/sP3GpNW1Bgs?t=1s
Anyone ever substantiated and proven "leached shit from copper?"
Anybody hear anything about the CMEP-OL lately? So much fanfare then nothing...
I would say he's more of a clownshoe than "retarded" ... just sayin'
Yeah the guys at instalation parts supply say the lead free brass and copper and solder thing was done only to snuff out small businesses like theirs. They talked about all the old ass pipes under big cities and how no one is seeing any lead poisoning from it. If you have proper drier filter setups and take moisture seriously, there should never be a substantial amount of water in your solvent.
Sorry, the link showed as crashed for me, so I reported it and tried again with no success.
In answer to the general question, simple non-polar fully saturated Alkanes like n-Propane and Butane, with a dielectric constant around ~1.3, are not looking for metal ions, so copper sulfates and oxides are not soluble in it, at any levels of concern.
Sulfur compounds in butane will corrode copper into copper sulfate, and water, with a dielectric constant of around ~80, may contribute to oxidation with some of the components it transports, making it corrosive. Neutral Ph (7.0) water is not highly corrosive to copper either.
Solders used to join the copper may be of health concerns, if they include lead, though it isn't highly soluble in n-Butane.
Cutting to the chase, I've never witnessed that sort of copper corrosion of an Appion heat exchanger, and if it was corroded, without being soluble in n-Butane, the corrosion will not be transported and deposited in the meds.
That said, I use stainless for my own systems, even though it is a poor conductor compared to copper.
FDA standards require that sanitary equipment be easily taken apart for cleaning or cleaned in place. You can flush harsher chemicals through stainless, than copper, without dissolving the metal itself.
PS: Google "Fume Fever", which is a welders occupational disease from welding copper with no respiratory protection. not minuscue quantities in a dab. http://www.cdc.gov/niosh/docs/81-123/pdfs/0675.pdf
Anybody hear anything about the CMEP-OL lately? So much fanfare then nothing...
If you hear that recovery pumps with any copper, or that any other copper component of your CLS is poisoning your BHO, that's what you get for not slapping down the postulators of BS when they start spewing.
http://youtu.be/sP3GpNW1Bgs?t=1s
Anyone ever substantiated and proven "leached shit from copper?"
Sub zero on a recovery tank just sounds scary. Would probably have to buy a sweet ss tank with cryogenic rated valves. I think I have reached the point where I'm satisfied. Maybe if things change in cali in 2016 I'll go legit and bigger but right now I got too much invested already that I'll probably never make back hehehe![/QUOTE
Exactly, I just upgraded everything to be pretty much as sanitary as things can be for right now, I'm happy, Plus in 2016 Im pretty sure things will be drastically different, That's when the real money will get in. I know an owner of Bio-Rad and he just waiting until 2016 to be all over this, He keeps telling me just to be ready... if people like that are thinking about this industry you know where it's going to head... but I guess time will tell tho