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Preparation of strongly acidic cation-exchange resins from gymnosperm acid hydrolysis lignin

Abstract

The chemical preparation of strongly acidic cation-exchange resin from sulfuric acid lignin (Klason lignin) (SAL), a typical acid hydrolysis lignin, was investigated. Sulfonation of resinified SAL itself gave a resin with an ion-exchange capacity of 2.3 mEq/g. After resinification with formaldehyde, the phenolized SAL with a reactivep-hydroxyphenyl group yielded a resin with an ion-exchange capacity of 3.2 mEq/g. The latter capacity is superior to that of the corresponding commercial phenol-type resins (2–3 mEq/g), but did not reach the level of the corresponding commercial styrene-type resins (4-5 mEq/g).

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Correspondence to Seiichi Yasuda.

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Yasuda, S., Asano, K. Preparation of strongly acidic cation-exchange resins from gymnosperm acid hydrolysis lignin. J Wood Sci 46, 477–479 (2000). https://doi.org/10.1007/BF00765807

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Key words

  • Lignin
  • Sulfonation
  • Cation-exchange resin
  • Hydrolysis lignin
  • Klason lignin