Abstract
This study concerned the conversion of black liquor organic components
during heat treatment in the liquid phase. The liquor was treated for 45
minutes at 350-degrees-C after a sodium hydroxide charge of 15-45% of
the mass of black liquor dry solids. A hydrophobic, lignin-derived oil
product (about 40% of initial organics) was formed, in addition to
volatile products (about 35% of initial organics) and fragments
remaining in the aqueous phase. Detailed GLC analysis of the
low-molecular-weight aqueous phase components indicated the presence of
various aliphatic carboxylic acids (5-20% of initial organics). These
acids were primarily degradation products of the original acid fraction
of the feed black liquor. The influence of conversion conditions on the
composition of the acid fraction is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 127-130 |
| Journal | Holzforschung |
| Volume | 45 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1991 |
| MoE publication type | A1 Journal article-refereed |