Coexist is pronounced as "koh-ig-zist."
It has a short I sound, and so does the E. (ig-zist).
Sludge acid, also known as sulfuric acid, is commonly used in the production of asphalt to help in the separation of asphalt from other components during refining. The sludge acid reacts with the components in the crude oil to create a chemical reaction that helps produce asphalt as the end product. The process involves mixing the sludge acid with the crude oil and subjecting it to high temperatures to enable the conversion into asphalt.