General view of a ring closure reactor used in the production of Penton, a chlorinated polyether used as an ingredient in protective coatings for structural steel and other metals, papers, cardboard, and plastics, at the Hercules Powder Company plant in Parlin, New Jersey. The employee visible in the photograph is unidentified. Per notations accompanying the photograph, the ring closure reactor was used to form BCMO, a type of monomer, from Pentaerythritol Trichloro Monoacetate, a key intermediate useful in the production of films, filaments, and plastics.
Formed in 1912 as part of an anti-trust settlement with DuPont, the Hercules Powder Company (later Hercules Inc.) initially specialized in the manufacture of explosives and smokeless powders and subsequently diversified its business to encompass a variety of industrial products, including pine and paper chemicals, synthetics, pigments, polymers, and cellulose.
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Hercules Incorporated. “Ring Closure Reactor at Hercules Parlin Plant,” circa 1961. Photographs from the Records & Ephemera of Hercules Incorporated, Box 2, Folder 24. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/wp988k63g.
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