| 1950 |
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Manganese Chemicals Corporation forms under a U.S. government contract to promote domestic manganese production. |
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| 1953 |
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Riverton, MN plant begins producing high purity manganese carbonate from low-grade local ore. |
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| 1959 |
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Pickands-Mather acquires Manganese Chemicals Corporation. |
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| 1962 |
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Baltimore, MD and Kingwood, WV plants start-up using high grade foreign ores. |
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| 1968 |
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Diamond-Shamrock acquires Pickands-Mather. Manganese Chemicals becomes the Chemetals Division of Diamond-Shamrock. |
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| 1973 |
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Chemetals introduces high purity manganese oxides at low cost, benefitting electronics and specialty chemical producers. |
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| 1975 |
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Chemetals commercializes anhydrous manganese halide salts. |
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| 1978 |
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Chemetals, Inc. is born as SEDEMA (Belgium) acquires Chemetals Division from Diamond-Shamrock. |
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| 1985 |
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The Kingwood, WV plant closes permanently. |
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| 1986 |
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Nitride products relocate to Baltimore. |
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| 1987 |
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Chemetals acquires the manganese business of Foote Minerals in New Johnsonville, TN and introduces CST, a sulfur sorbent used to protect sensitive refining catalysts. |
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| 1988 |
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Société Générale de Belgique restructures. SEDEMA and Chemetals become part of SADACEM, S.A. Baltimore multi-purpose plant start-up manufacture of Mn3O4, PF, MnCO3 UF. |
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| 1989 |
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Chemetals expands its New Johnsonville capacity. |
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| 1990 |
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Comilog acquires SADACEM S.A. from Société Générale. |
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| 1993 |
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Chemetals expands its New Johnsonville capacity and achieves ISO 9001 certification in Baltimore. |
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| 1994 |
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Chemetals expands nitriding capacity at Baltimore. Eramet purchases controlling interest in Comilog. |
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Chemetals introduces LiMnO4 to its product line. |
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| 1998 |
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| 1999 |
Chemetals expands its New Johnsonville capacity. |
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| 2000 |
Eramet acquires Chemetals and name changes to Erachem Comilog, Inc. Also, New Johnsonville expands capacity. |
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| 2002 |
New Johnsonville operations completes capacity expansion. Eramet acquires Sulfamex, a Mexican company that produces products sold to the agrochemical markets. |
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| 2006 |
Erachem Comilog, Inc. lends technical expertise for start-up operation of EMD operations in Chongzuo, China. |
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| 2008 |
Erachem Comilog, Inc. achieves ISO 9001:2000 certification and continues EMD expansion in Chongzuo. |
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