Occidental Petroleum’s chemical division is considering an overhaul of some chlor-alkali plants to increase capacity to produce higher-value caustic soda, CFO Robert Peterson said Feb. 25. Speaking during the company’s Q4 2021 earnings call, Peterson said OxyChem is investing in a study regarding modernization of “certain” US Gulf Coast chlor-alkali assets to convert to membrane-grade from diaphragm-grade caustic soda capacity….