ForestBioFacts

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Acid sulphite pulping In 1866, the American chemist Benjamin C. Tilghman patented in England a method wherein the defibration of wood took place in a pressurised system of aqueous calcium hydrogen sulphite (Ca(HSO3)2) and sulphur dioxide (SO2).1,2 This “sulphite cooking” process was not immediately realised on a large scale. However, Carl Daniel Ekman conducted pivotal

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