2009
Columbian Chemicals Co. expands its China and Hungary facilities.
One Equity Partners acquires DC Chemicals ownership portion of Columbian Chemicals Co.

2007
Columbian Chemicals Co. starts operations at Bahia, a Greenfield facility.
Columbian Chemicals Co. acquires Weifang facility in China.
Columbian Chemicals Co. North Bend Cogeneration facility starts operations.

2005
Columbian Chemicals Co. is acquired from Phelps Dodge by DC Chemicals/One Equity Partners.

2003
Liaoning Birla Carbon, a subsidiary of Thai Carbon Black Public Co. Ltd., starts operations in China.