Alternatively , green liquor can be used prior to white liquor to extract some hemicellulose .
The green liquor is usually reacted with lime ( CaO ) in the causticizing stage to regenerate white liquor .
Green liquor can be used prior to white liquor to extract some hemicellulose .
The green liquor is usually reacted with lime ( CaO ) in the causticizing stage to regenerate white liquor .