Best Impeller Type For Overhead Stirrer For Mixing Cleansers

Formulating

Best Impeller Type For Overhead Stirrer For Mixing Cleansers

Posted by MarkBroussard on December 8, 2016 at 6:41 pm

Recommendations? … Either a cross impeller or a propeller?

johnb replied 8 years ago 5 Members · 11 Replies
11 Replies

Bobzchemist

Member
December 8, 2016 at 9:05 pm

Lab, pilot or production?

I prefer to use glass beakers. If you’re working in a situation where replacing those beakers isn’t an issue, or if you use stainless steel mixing vessels, I’d suggest an efficient turbine/hydrofoil blade.
http://www.indco.com/shop/impellers/hydrofoil

If you’re working for a smaller company, or are on your own, and replacing beakers is a significant cost, I’d suggest using a somewhat less efficient, but much safer/gentler on beakers, coil/spiral impeller.
http://www.indco.com/shop/search?keyword=coil

https://www.amazon.com/Talboys-Bow-Tie-Impeller-Diameter-Stainless/dp/B005CJZJIW

Indco has some good information
http://www.indco.com/shop/impellers
MarkBroussard

Member
December 9, 2016 at 6:25 am

@Bobzchemist

Lab scale … batches are about 3 Liters … no issue with beakers. The main issue is mixing for dispersion of Sclerotium Gum as a thickening agent to form a gel cleanser w/o trapping a significant number of bubbles in the gel.
johnb

Member
December 9, 2016 at 9:40 am

I was introduced to this type of stirrer ages ago and it became my standard general use device for efficient mixing.

http://www.ika.com/owa/ika/catalog.product_detail?iProduct=0513500&iProductgroup=187&iSubgroup=1&iCS=1&iAcc=1&iCon=
Bobzchemist

Member
December 9, 2016 at 3:02 pm

That should be perfect for general dispersions.

Mark, you might seriously want to try the bow tie coil impeller. The flow pattern may be what you need for the Sclerotium Gum.
Bobzchemist

Member
December 9, 2016 at 3:03 pm

http://www.troemner.com/bow-tie-coil-impeller-with-1-5-inch-coil-length-5-16-inch-shaft-diameter-and-12-inch-shaft-length-987426
belassi

Member
December 9, 2016 at 4:31 pm

At $492 for a bit of bent metal on a rod, (R1300) I think I’d rather pay a local machine shop the same to make about 50 of them.
johnb

Member
December 9, 2016 at 4:39 pm

Which is what I did after assessing the first one.
Microformulation

Member
December 9, 2016 at 9:31 pm

In my experience, with the exception of anchor blades (need at least one of them), most blades are pretty affordable. I own several bow tie impellers and use them often. http://www.indco.com/five-inch-anchor-paddle
belassi

Member
December 9, 2016 at 9:41 pm

One of these might be pretty useful for making things like peel-off face masks.
http://chinaconcretemixers.com/mini-concrete-mixer-for-sale/
MarkBroussard

Member
December 9, 2016 at 10:37 pm

Thank you all for your comments and recommendations. I will try a couple of the options mentioned above.
johnb

Member
December 11, 2016 at 8:48 am

If anyone is interested in making their own stirrer in the design I highlighted above be aware the the toothed disc on the stirrer shaft is at an angle of about 10 degrees off horizontal. This is not apparent from the illustration on the IKA site. The offset is necessary to give efficient stirring action.