Papermills in U.S. annually produce 3 million tons of sulfite waste liquor solids; other fractions of waste liquor are monomeric sugars and lignosulfonates in solution. Recovery of lignosulfonates involves precipitation and cross-linking of sulfonates to form useful solid ion-exchange resin. Contamination of sugars recovered from liquor is avoided by first converting them to ethanol, then removing ethanol by distillation.
Recycling paper-pulp waste liquors
NASA Tech Briefs ; 5 , 4
1981-04-01
Sonstige
Keine Angabe
Englisch
Online Contents | 1997
Online Contents | 1995
British Library Online Contents | 1997
"Axel Gorthon", paper-pulp carrier
Engineering Index Backfile | 1956