Hello,
Not a soap-maker but bear with me, I’m bringing gifts😇
You say “What I don’t understand is how I can make a soap with only stearic acid and another with only palmitic acid.” but they say in the patent “Experimentation has proved that the soap or cream containing the specified palmitic-stearic mixture, glycerin, and water, as disclosed in this specification”- plus the obvious NaOH/ KOH.
On a older post (stick deodorant, but the theory applies), @Bobzchemist said “If you’re trying to make a solid stick, it would probably be easier to use Sodium Hydroxide and Stearic Acid. Heat your water/zemea mixture to no more than 85C, start stirring, add Stearic Acid, wait until it’s dissolved, add Sodium Hydroxide, mix 30 minutes while reaction completes, (it’s exothermic, so you will probably shoot up to 95C without heating further. If your starting water mixture is too hot, the extra heat from the reaction will make the batch boil - not a good thing) Add your other ingredients and cool down. Pour into sticks at about 60 - 70C” so I’d venture to say that if you replace the “zemea” with glycerin and follow the procedure, you’ll have your soap.
Here’s the link to the old post, it might help https://chemistscorner.com/cosmeticsciencetalk/discussion/making-deodarant/
chemistscorner.com
Making Deodarant - Chemists Corner
Hi Perry, I've recently challenged myself into making my own deodorant and never got past the first step which was dissolving sodium stearate in some…