The Chemistry of Bromination of Wood. V. Main Features of the Reaction of Picea excelsa with Aqueous Bromine at Low pH and High Initial Bromine Concentrations

Jacob Zabicky

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Spruce wood-meal was reacted with aqueous bromine at initial concentrations ranging from about 0.0025 up to 0.0080 M per g./l. of wood consistency. Contrary to observations at lower initial bromine concentrations, bromine remains in solution after a fast initial reaction, and it becomes depleted at a much slower rate. The ratio of HBr in solution to Br2 depleted from the solution points to the participation of bromine adsorption. The processes involved in bromine consumption are most probably diffusion controlled. It was shown that ideally one should expect the same bromine uptake per mole of bromine initially added to the system, at all initial bromine concentrations; this however, is not attained in practice because of competing slow reactions, which are unimportant at low initial bromine concentrations, whence all the bromine becomes rapidly consumed. A convenient method for quick titrimetric determinations of hydrobromic acid in the presence of bromine is described.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalHolzforschung
Volume25
Issue number3
DOIs
StatePublished - 1 Jan 1971
Externally publishedYes

Keywords

  • Bestimmung von HBr/Br-
  • Brom
  • Bromierung
  • Bromination
  • Bromine
  • Bromwasserstoffsäure
  • Fichtenholzmehl
  • Hydrobromic acid
  • Hydrobromic acid-bromine
  • Lignin
  • Mischungen
  • mixtures determination
  • Picea excelsa
  • Polysaccharide fraction of
  • Polysaccharidfraktion
  • Spruce meal
  • wood

ASJC Scopus subject areas

  • Biomaterials

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