Haldor Topsøe A/S
- http://www.topsoe.com/
- Research and development in heterogeneous catalysis, licensing of process know-how, production and sale of catalysts, and engineering of process plants for the fertilizer, petrochemical, and refining industry and for environmental protection.
Hebei Jiheng Group Co., Ltd.
- http://www.jihenggroup.com/
- Manufacturer of electrochemical inorganics such as persulfates, bromates, and bromites, specialty organics, and pharmaceutical ingredients and intermediates. Located in China.
Hercules, Inc.
- http://www.herc.com/
- Manufactures chemical specialties used in making a variety of products for the process chemicals and services business and functional products business.