- Albemarle Corporation
- China Petrochemical Corporation
- BASF SE
- Clariant AG
- Dorfketal Chemicals (I) Pvt Ltd.
- Evonik Industries AG
- Haldor Topsoe AS
- Honeywell International Inc.
- INEOS
- Johnson Matthey
- Lyondellbasell Industries Holdings BV
- Mitsui Chemicals Inc.
- Nouryon
- NOVA Chemicals Corporation
- Toho Titanium Co. Ltd
- Univation Technologies LLC
- W R Grace & Co.
- Zeochem AG
- Zeolyst International