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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 3 OH contents of original kraft lignin and the ester derivatives estimated by a quantitative 31P NMR method

From: Selective substitution of long-acyl groups into alcohols of kraft lignin over transesterification using ionic liquid

Sample

OH content (mmol g−1)

R-OH

Ar-OH

Total OHa

Kraft lignin

2.4

3.6

6.5

LigAc

0.26

3.0

3.6

LigPr

0.25

2.9

3.5

LigBu

0.20

2.8

3.3

LigHe

0.23

2.7

3.2

LigOc

0.20

2.5

3.0

  1. aSum up of R-OH, Ar-OH, and COOH groups
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