W.R. Grace & Co.United States
Dalian Haixin Chemical Industrial Co., Ltd.
Absorbent Products Ltd.British Columbia, Canada
Qingdao Huicheng Environmental Technology Group Co., Ltd.SD, CN
PQ Corp.Pennsylvania, United States
Zeotech Corp.
INEOS Silicas Ltd.
EP Minerals LLCNevada, United States
Zeochem AGKentucky, United States
Qingdao Huicheng Environmental Technology Group Co., Ltd.Shandong Sheng, China
Chemiewerk Bad Kstritz GmbHThüringen, Germany
UniZeo Co., Ltd.Tokyo, Japan