Kraft 2


Kraft 2 : From the German, meaning strength. An alkaline papermaking process, also known as sulfate pulping. Wood chips are digested in an aqueous solution of sodium sulfate, which becomes reduced to sodium sulfide by the organic matter, and sodium hydroxide. The overall chemical process is the attack of the bisulfide ion on the lignin molecule, depolymerizing it, with the formation of lignosulfonates
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