Albemarle Corporation
ANTEN Chemical Co., Ltd.
Arkema SA
Axens SA
BASF SE
Bear River Zeolite Co.
Blue Pacific Minerals Ltd.
Calgon Carbon Corporation
Chalco Shandong Advanced Material Co Ltd
Chemiewerk Bad Kostritz GmbH (CWK)
Clariant AG
DP Transcarpathian Zeolite Plant
Eurecat SA
Gordes Zeolite
Honeywell UOP
International Zeolite Corp.
IQE Group
JGC Catalysts and Chemicals Ltd. (JGC C&C)
Johnson Matthey
KMI Zeolite Inc.
KNT Group
Milliporesigma
National Aluminium Company Limited (Nalco)
Ningbo Jiahe New Materials Technology Co Ltd
PQ Corporation
PT. D&W Internasional
Rota Madencilik As - Rota Mining Corp.
Sachem Inc.
Showa Denko K.K.
Sinopec Shanghai Research Institute of Petrochemical Technology (SRIPT)
Sorbead India
St. Cloud Mining Company
Teague Mineral Products
Tosoh Corporation
W. R. Grace & Co.-Conn.
Zeocel Portugal Lda.
Zeochem AG
Zeotech Corporation
Zhengzhou Fulong New Materials Technology Co. Ltd.