This process is necessary if you plan on eating corn as a major part of your diet (both before and after some 'event").
The point is that we need Niacin in our diets to avoid the nutrient deficiency know as Pellegra.
So the process is relatively simple and you DO want to keep this process in your prepper recipes...
This article contains good information about how to do it and why.
http://www.cooksscience.com/articles/feature/transforming-corn/There is an abundance of information on Nixtamalization on the 'net, so you can find lots of supporting documentation and other descriptions of the process.
DO NOTE, it works on other grains besides corn... But corn is easily grown and should be part of your diet.
You DO NOT need the pure chemicals lye (Sodium Hydroxide) or Lime (Calcium Hydroxide). Using wood ash to produce lye is the original (and some think the best) way to go.
If you don't have access to wood ashes right now, then you can purchase "food grade" lye and lime (look in grocery stores which carry Mexican food). Worst case, you can buy preprocessed Masa corn meal.
Since lye is highly alkaline, it can burn skin (particularly the eyes and mouth), so DO observe the warning and wash everything thoroughly during and after the process. Lye is not poisonous, but neither is water and too much of either can be a problem...
Use ceramic or glass containers and wood or plastic spoons. Lye will attack metal cooking utensils and can add an "off" flavor to the food being processed.