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What is the role of sodium pyrophosphate in papermaking?

Sodium pyrophosphate is mainly used for bleaching paper and plant fibers in the papermaking industry. It can effectively remove iron ions during the papermaking process by forming complexes with iron ions, thereby preventing paper from yellowing and discoloration. In addition, sodium pyrophosphate can react with pigments and impurities in fibers, further improving the whiteness and purity of paper.



It should be noted that the dosage of sodium pyrophosphate needs to be tested according to the specific papermaking process and raw materials to ensure good bleaching effect and paper quality.

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