Lately I've been using it on my 11 year old dog who had calcium oxide crystals in his urine. (foodrenegade.com)
At high heat, limestone's calcium carbonate splits into calcium oxide (the desired lime content) and carbon dioxide (the waste). (drawdown.org)
One novel contribution in the course of this research has been the synthesis and identification of a new compound — calcium glycerolate — «which notably surpasses calcium oxide and glyceroxide in stability and makes it a very good candidate for the development of heterogeneous catalysts for the synthesis of biodiesel.» (sciencedaily.com)