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Stirrer Impeller

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BlackestofOps

Member
Anyone have any tips or anecdotes on picking the proper mechanical stirrer impeller style? I will be using it primarily to mix >90% cannabinoid distillate with a de-waxed terpene heavy fraction, with some heat (100F) provided by a hot plate. I don't think a magnetic stirrer will be sufficient.

I'm looking at these: https://us.vwr.com/store/catalog/product.jsp?catalog_number=43300-252 . Other sources for the same impellers list different applications/viscosity than WVR lists. I'm thinking radial flow or propeller, but may go with the Visco-Jet® Impellers in plastic, if suitable.

Thanks.
 
SkyHighLer

SkyHighLer

Got me a stone bad Mana
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You could try a hand blender, they work best when you can move it around in the bowl as you blend. The one pictured has two speeds,

https://www.amazon.com/Betty-Crocke...8&qid=1495665487&sr=1-7&keywords=hand+blender

You'd most likely want to slow it down with a Variac, or a solid state motor controller, you could even try a cheap lamp dimmer, but the Variac rules. Get a 110V/20A from eBay or Amazon, last I saw them going for was $85 delivered, it'll come in handy for many other projects.
 

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B

BlackestofOps

Member
SkyHighLer said:
You could try a hand blender, they work best when you can move it around in the bowl as you blend. The one pictured has two speeds,

https://www.amazon.com/Betty-Crocke...8&qid=1495665487&sr=1-7&keywords=hand+blender

You'd most likely want to slow it down with a Variac, or a solid state motor controller, you could even try a cheap lamp dimmer, but the Variac rules. Get a 110V/20A from eBay or Amazon, last I saw them going for was $85 delivered, it'll come in handy for many other projects.
Click to expand...

Thanks for the recommendation, but I'm more interested in solutions that do not require me to stand in front of the process for the duration.

whatthe215 said:
Are you looking for a full setup or just the impeller?

I have a few of these, they work fine.
http://www.ebay.com/itm/100-W-Lab-E...594942?hash=item2a683f243e:g:ZSIAAOSwxehXPSwV
Click to expand...

I have already decided on a Heidolph set up, I'm just interested in the relative advantages of one impeller type over another. I would go for a cheaper set up, if it was as reliable and capable as the Heidolph. This lab is getting built from scratch, and is fully funded, so I'm not trying to cut corners...yet.
 
E

easystephen

Member
I definitely recommend the propeller over the radial flow. I'm not sure what container you are mixing in but I don't imagine there are any baffles, in which case you won't get much axial flow without a propeller style mixer. Make sure your stand has a retention strap for the container. If you have a really viscous mixture the whole container can start to rotate on you.
 
Gray Wolf

Gray Wolf

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BlackestofOps said:
Anyone have any tips or anecdotes on picking the proper mechanical stirrer impeller style? I will be using it primarily to mix >90% cannabinoid distillate with a de-waxed terpene heavy fraction, with some heat (100F) provided by a hot plate. I don't think a magnetic stirrer will be sufficient.

I'm looking at these: https://us.vwr.com/store/catalog/product.jsp?catalog_number=43300-252 . Other sources for the same impellers list different applications/viscosity than WVR lists. I'm thinking radial flow or propeller, but may go with the Visco-Jet® Impellers in plastic, if suitable.

Thanks.
Click to expand...

I would suggest that you raise the temperature to lower viscosity and use a magnetic stirrer so as to not whip air (oxygen) into the mix.

Once fluid, they should mix readily.

Also less messy than mixing a thick resin with a hand mixer.
 
B

BlackestofOps

Member
Solid advice, easystephen. I'll go with the propeller, then.

Graywolf, I have a hot plate with magnetic stirrer on my buy list, so I'll have both methods available. I haven't tried stirring large batches of distillate with a stir bar before, but I have seen air get whipped into batches using an overhead stirrer, so I will have to have a validation round to determine our best mixing process.

Thanks.
 
D

Digital Man

Member
BlackestofOps said:
Solid advice, easystephen. I'll go with the propeller, then.

Graywolf, I have a hot plate with magnetic stirrer on my buy list, so I'll have both methods available. I haven't tried stirring large batches of distillate with a stir bar before, but I have seen air get whipped into batches using an overhead stirrer, so I will have to have a validation round to determine our best mixing process.

Thanks.
Click to expand...

How much are you planning to mix at a time ?
 
SkyHighLer

SkyHighLer

Got me a stone bad Mana
ICMag Donor
Veteran
Planetary action kitchen mixer with heated bowl.

Here's an all-in-one unit,

https://www.amazon.com/CHEFTRONIC-H...065&sr=1-2-spons&keywords=kitchen+mixer&psc=1

Here's KitchenAid's tilt-head mixer and heated bowl,

https://www.amazon.com/KitchenAid-K...&qid=1496361016&sr=1-4&keywords=kitchen+mixer

https://www.amazon.com/KitchenAid-K...908&sr=1-1&keywords=heated+bowl+kitchen+mixer

KitchenAid also has a heated bowl accessory for their bowl-lift models,

https://www.amazon.com/dp/B00U0VTDU2/ref=psdc_289696_t1_B00U0VTDRU
 

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D

Digital Man

Member
I'm thinking those food mixing bowls w/heater would take even longer to liquify distillate than a hot plate would. Just look at the small surface area.

They could be a good solution for an already pre-heated/liquified distillate though. Nice find Sky !!
 
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