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Chemviron to Sell Diatomaceous Earth and Perlite Assets to Imerys

May 2, 2024

Pittsburgh, PA, April 29, 2024 – Calgon Carbon Corporation (“Calgon Carbon” or “Company”), a wholly-owned subsidiary of Kuraray Co., Ltd. (TYO: 3405) (“Kuraray”), announced today that its European business, Chemviron, has entered into exclusive negotiations with Imerys, a supplier of mineral-based speciality solutions headquartered in France, to sell its diatomaceous earth and perlite business.

The transaction, which is subject to customary closing conditions, including the information and consultation of employee representatives, is expected to be completed by the end of the year.

Amanda Lofty 
Director – Global Communications 

About Calgon Carbon 
Calgon Carbon, a wholly-owned subsidiary of Kuraray Co., Ltd. (TYO: 3405) (Kuraray), is a global leader in the manufacture and/or distribution of innovative coal-, wood- and coconut-based activated carbon products – in granular, powdered, pelletized and cloth form – to meet the most challenging purification demands of customers throughout the world. Calgon Carbon provides purification solutions for more than 700 distinct applications, including drinking water, wastewater, pollution abatement, and a variety of industrial and commercial manufacturing processes. Headquartered in Pittsburgh, Pennsylvania, Calgon Carbon employs approximately 1440 people and operates 20 manufacturing, reactivation, innovation and equipment fabrication facilities in the U.S., Asia, and Europe, where Calgon Carbon is known as Chemviron. Calgon Carbon was acquired by Kuraray in March of 2018.  With complementary products and services, the combined organization will continue to focus on providing the highest quality and most innovative activated carbon and filtration media products, equipment, and services to meet customer needs anywhere in the world. Visit 

About Imerys
Imerys is the world’s leading supplier of mineral-based specialty solutions for the industry with €3.8 billion in revenue and 13,700 employees in 54 countries in 2023. The Group offers high value-added and functional solutions to a wide range of industries and fast-growing markets such as solutions for the energy transition and sustainable construction, as well as natural solutions for consumer goods. Imerys draws on its understanding of applications, technological knowledge, and expertise in material science to deliver solutions which contribute essential properties to customers’ products and their performance. As part of its commitment to responsible development, Imerys promotes environmentally friendly products and processes in addition to supporting its customers in their decarbonization efforts. Imerys is listed on Euronext Paris (France) with the ticker symbol NK.PA.