| 摘要 |
<p>P. C. Leithem 2x PROCESS FOR ACID SULFITE DIGESTION OF WOOD The production of chemical pulp by the acid sulfite digestion process is improved by increasing the ratio by weight of combined SO2 to wood to a range of from 4 to 12 (based on one part of combined SO2 to 100 parts of dry wood) and by increasing the minimum average rate of heating to the substantially maximum cooking temperature to 40.degree.C per hour.</p> |
