| 摘要 |
<p>In a regenerated cellulose recovery process wherein (1) coated, softened, regenerated cellulose is comminuted, (2) the softener is removed leaving coated regenerated cellulose having open internal pores, (3) the coating is removed from the regenerated cellulose by flushing with a coating solvent, and (4) the regenerated cellulose is dried of coating solvent, the improvement wherein the regenerated cellulose is dried of coating solvent by contacting the regenerated cellulose having a solvent content of at least about 6% by weight at an elevated temperature with a gas stream containing an effective amount of water vapor to raise the regenerated cellulose water content to about 7 to 22 percent by weight and to reduce the coating solvent content of the regenerated cellulose. In a preferred embodiment, steam is selected as the gas stream and residual coating solvent is reduced to less than about 1 percent by weight.</p> |
