Does Hydroxyethylidene Diphosphonic Acid (HEDP) Accelerate Kraft Pulping?

Does Hydroxyethylidene Diphosphonic Acid (HEDP) Accelerate Kraft Pulping?

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Hydroxyethylidene diphosphonic acid (C2H4O11P2 – HEDP) has recently been advocated as an additive in kraft pulping to accelerate delignification and to increase pulp yield. Unlike anthraquinone, another additive often used in kraft pulping, the action of HEDP is species dependent. This work was done to detail the species dependence and to understand how HEDP accelerates kraft pulping.