- Albemarle Corporation
- Chicago Bridge & Iron Company NV
- Clariant AG
- China Petrochemical Corporation (Sinopec)
- Dorf-ketal Chemicals India Private Limited
- DowDuPont Inc.
- Evonik Industries AG
- Haldor Topsoe
- Honeywell
- Lyondellbasell Industries Holdings B.V.
- Mitsui Chemicals Inc.
- Nova Chemicals Corporation
- W. R. Grace & Co.
- Zeochem
- Zeolyst International