Headquartered in Atlanta, GA, OCI Chemical Corporation is a wholly owned North American subsidiary of OCI Company Ltd. of Seo ... ul, South Korea. OCI Chemical was founded in 1996 as part of OCI Company's acquisition of Rhone Poulenc's U.S. soda ash interests. OCI Chemical is one of the world's largest producers of natural soda ash and also produces sodium percarbonate and hydrogen peroxide. read more