| 摘要 |
A process for pulping wood and bark in formic acid of at least 35% concentration, ideally at 65% to 90%, refluxing at atmospheric pressure, to produce wood and bark pulp of high hemicellulose content and very high holocellulose yields and resulting in a liquor of very low carbohydrate content which on recovery of the formic acid leaves a low molecular weight, less than 1,000, lignin; the wood pulp is useful in the paper industry and as an animal feed, the bark pulp is an ideal ruminant feed, replacement for tobacco in pipes, cigarettes and cigars while the lignin may be employed as a base for polyols or dealkylated or hydrodealkylated to phenol, substituted phenols and benzene. |
