Trevor asked a great quest recently in regard to making his own Liquid Calcium Chloride from 77% Flake Chloride which is readily available in his area. I wanted to share the question as well as my response, in case any of you are looking to do the same. Trevor also asked about mixing Salt Brine he is making with the Calcium Chloride to enhance the melting capacity in these cold, cold, cold temps we have been experiencing. I had to put that many (cold’s) in there to even come close to the frigid temps and high winds we have been experiencing. With that said, let’s move to Trevor’s Question.
“Hi Dave: I am trying to make CaCl2 brine and am having trouble finding the mix ratio. I make up 1000 gallon batches of Salt brine with 1 ton of salt to get a 23.5% solution. The only Calcium chloride I can get in my area is 77% flake. I mainly use this for deicing, and want the Calcium Chloride brine for when it gets colder. I have also toyed with the idea of adding x% of Calcium Chloride to my 23.5% solution of Salt brine. Was also thinking of adding just before application as the exothermic reaction creates heat which is a good thing when deicing. Thanks in advance for any light you can shed on this subject.”
Great Question, Sorry for delay I had to do some research myself on this one. The 77% dry flake you are finding is not from Occidental Chemical, they manufacture 84% dry flake or pellets. So with that said, a mixture of 450 lbs. of 77% CaCl2 with 77 gallons of water will make 100 gallons of 32% calcium chloride. It would weigh 11 Lbs. per gallon. 32% is the best deicer for cold weather de-icing.
We are successfully mixing 32% Calcium Chloride to the 23% salt brine at a 80 Brine/20 CaCl2 blend. We have the most experience with the BOOST* inhibited product, but if you don”t plan to store for long periods of time without agitation, the straight 32% will work fine.
We do have a calculator on the Oxy web site that will get you in the ball park with the 84% Dry flake as the benchmark. You can then look at the chart for specific gravity and add dry to your liquid to make the mix you are looking for.
The Physical Properties Guide is (page 6 of the guide): www.oxy.com/OurBusinesses/Chemicals/Products/Documents/CalciumChloride/173-01791.pdf
You may have to copy links and paste the address to your broswer.
Please let me know how this works for you. Best of luck and be safe out there.