Old time lime kilns, while not overly complicated to construct, were not very good for the health of the operators. And unless you have a significant amounts of limestone to burn, I'd suggest looking for alternatives.
Glycerin - "The process of removing the glycerin from the soap is fairly complicated (and of course, there are a lot of variations on the theme). In the most simplest terms: you make soap out of fats and lye. The fats already contain glycerin as part of their chemical makeup (both animal and vegetable fats contain from 7% - 13% glycerine). When the fats and lye interact, soap is formed, and the glycerin is left out as a "byproduct". But, while it's chemically separate, it's still blended into the soap mix.
While a cold process soapmaker would simply pour into the molds at this stage, a commercial soapmaker will add salt. The salt causes the soap to curdle and float to the top. After skimming off the soap, they are left with glycerin (and lots of "impurities" like partially dissolved soap, extra salt, etc.). They then separate the glycerin out by distilling it. Finally, they de-colorize the glycerin by filtering it through charcoal, or by using some other bleaching method." source
Bleach is made by bubbling chlorine gas through a lye solution. You do not want to manufacture chlorine gas at home. Skip this.
Hydrogen peroxide is also not something you can make outside of the chemists lab.
Acetone is made via the [Acetone–butanol–ethanol fermentation process]http://en.wikipedia.org/wiki/Acetone%E2%80%93butanol%E2%80%93ethanol_fermentation) and ,again, is not something you do at home.
Borax is mined, not manufactured.
You are not going to be able to make the powdered gelatin you are thinking of, but you can make gelatin bone broth.
Unlless you are keen on salting and preserving the fourth stomach of your slaughtered calves, Vegetable Rennet is your easiest option.