Regeneration and recycling of aqueous periodate solution in dialdehyde cellulose production

H. Liimatainen, J. Sirviö, Heikki Pajari, O. Hormi, J. Niinimäki

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

The regeneration of aqueous iodate solution from the regioselective periodate oxidation of softwood cellulose pulp to dialdehyde cellulose using hypochlorite as a secondary oxidant was studied. The influence of oxidation time on the pulp dissolution and regeneration efficacy was examined in particular. In addition, the recycling of regenerated periodate solution back to oxidation was clarified. The solutions from the 10 and 15 min oxidations were regenerated with 100% conversion efficacy when 1.2–1.4 times the stoichiometric amounts of hypochlorite were used. However, the regeneration efficacy decreased when the reaction time in the oxidation increased to 30 min because the content of soluble impurities, which consumed the hypochlorite in the side-reactions, increased significantly as the oxidation reaction proceeded. The regenerated solutions possessed good oxidation performance, showing that periodate was successfully regenerated using hypochlorite and supporting the assumption that periodate can be effectively recycled in the process when short oxidation times are used.
Original languageEnglish
Pages (from-to)258-266
Number of pages8
JournalJournal of Wood Chemistry and Technology
Volume33
Issue number4
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Recycling
Cellulose
Hypochlorous Acid
Oxidation
Pulp
Iodates
2,3-dialdehydocellulose
metaperiodate
Softwoods
Oxidants
Dissolution
Impurities

Keywords

  • hypochlorite
  • iodate
  • oxidation
  • oxycellulose

Cite this

Liimatainen, H. ; Sirviö, J. ; Pajari, Heikki ; Hormi, O. ; Niinimäki, J. / Regeneration and recycling of aqueous periodate solution in dialdehyde cellulose production. In: Journal of Wood Chemistry and Technology. 2013 ; Vol. 33, No. 4. pp. 258-266.
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Regeneration and recycling of aqueous periodate solution in dialdehyde cellulose production. / Liimatainen, H.; Sirviö, J.; Pajari, Heikki; Hormi, O.; Niinimäki, J.

In: Journal of Wood Chemistry and Technology, Vol. 33, No. 4, 2013, p. 258-266.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Regeneration and recycling of aqueous periodate solution in dialdehyde cellulose production

AU - Liimatainen, H.

AU - Sirviö, J.

AU - Pajari, Heikki

AU - Hormi, O.

AU - Niinimäki, J.

PY - 2013

Y1 - 2013

N2 - The regeneration of aqueous iodate solution from the regioselective periodate oxidation of softwood cellulose pulp to dialdehyde cellulose using hypochlorite as a secondary oxidant was studied. The influence of oxidation time on the pulp dissolution and regeneration efficacy was examined in particular. In addition, the recycling of regenerated periodate solution back to oxidation was clarified. The solutions from the 10 and 15 min oxidations were regenerated with 100% conversion efficacy when 1.2–1.4 times the stoichiometric amounts of hypochlorite were used. However, the regeneration efficacy decreased when the reaction time in the oxidation increased to 30 min because the content of soluble impurities, which consumed the hypochlorite in the side-reactions, increased significantly as the oxidation reaction proceeded. The regenerated solutions possessed good oxidation performance, showing that periodate was successfully regenerated using hypochlorite and supporting the assumption that periodate can be effectively recycled in the process when short oxidation times are used.

AB - The regeneration of aqueous iodate solution from the regioselective periodate oxidation of softwood cellulose pulp to dialdehyde cellulose using hypochlorite as a secondary oxidant was studied. The influence of oxidation time on the pulp dissolution and regeneration efficacy was examined in particular. In addition, the recycling of regenerated periodate solution back to oxidation was clarified. The solutions from the 10 and 15 min oxidations were regenerated with 100% conversion efficacy when 1.2–1.4 times the stoichiometric amounts of hypochlorite were used. However, the regeneration efficacy decreased when the reaction time in the oxidation increased to 30 min because the content of soluble impurities, which consumed the hypochlorite in the side-reactions, increased significantly as the oxidation reaction proceeded. The regenerated solutions possessed good oxidation performance, showing that periodate was successfully regenerated using hypochlorite and supporting the assumption that periodate can be effectively recycled in the process when short oxidation times are used.

KW - hypochlorite

KW - iodate

KW - oxidation

KW - oxycellulose

U2 - 10.1080/02773813.2013.783076

DO - 10.1080/02773813.2013.783076

M3 - Article

VL - 33

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JO - Journal of Wood Chemistry and Technology

JF - Journal of Wood Chemistry and Technology

SN - 0277-3813

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ER -