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For a net-zero future

Babcock & Wilcox News

Leading the world in clean power production technology

B&W strengthens environmental offerings with Hamon Research-Cottrell emissions control technologies

Posted January 4, 2023

With the addition of Hamon Research-Cottrell (HRC) experts, technologies and experience to our environmental portfolio, B&W has even more options for helping customers reduce emissions and produce cleaner energy.


Hamon Research Cottrell Babcock Wilcox AcquisitionThe former Hamon Research-Cottrell got its start in 1906 when Dr. Frederick Gardner Cottrell, a physical chemistry professor at University of California, Berkeley, proved his invention for precipitating sulfuric acid in a small test unit. He applied and received a patent for his electrostatic precipitator (ESP) design in 1908. In 1912, he and other patent holders from around the world formed The Research Corporation, and the technology has advanced technically and geographically ever since.


Enhanced Product Offerings

HRC 2 u2aHamon Research-Cottrell environmental technologies enhance B&W’s already-robust portfolio of advanced air quality control system (AQCS) technologies and processes, including:

Enhanced Service Offerings

HRC 3B&W serves as the original equipment manufacturer (OEM) of all Hamon Research-Cottrell environmental products and services. The addition of HRC technologies also broadens our experience and installation base for parts, repairs, upgrades, performance optimization, inspections, maintenance and construction.



1906  Dr. Frederick G. Cottrell proved his ESP technology on a lab test unit

Dr. Cottrell formed the International Precipitation Company to bring the ESP to market​

Western Precipitation was established as a licensee in California

Commercial feasibility of Cottrell’s ESP was first demonstrated at E.I. DuPont de Nemours Powder Works in Pinole, California

1908 Patent no. 895,729 awarded for Cottrell’s ESP design
1912 The Research Corporation was ​established
1954 Company renamed to Research-Cottrell ​
1959 Western Precipitation acquired by Joy Manufacturing, which combined operations with Joy’s Allen-Sherman-Hoff unit to form Joy Environmental Technologies
1995 Babcock & Wilcox acquired Joy Environmental Technologies
1998 Through acquisition Research-Cottrell became Hamon Research-Cottrell
2003 B&W licensed wet ESP technology from FLS
2010 B&W acquired Gotaverken Miljo (GMAB), a leading European provider of flue gas treatment and energy recovery technologies
2010 ​ B&W acquired the Preciptech/BHA brand of dry ESP technology from GE to enhance its already robust product offerings of aftermarket ESP parts and services.
2022 B&W acquired all business assets and technologies of Hamon Research-Cottrell, Inc.