发明名称 |
Method for preparing bagasse dissolving pulps and producing rayon having a degree of polymerization of at least 800 therefrom |
摘要 |
A dissolving pulp suitable for preparing rayon having a degree of polymerization of greater than about 800 can be produced using bagasse by a sodium hydroxide-sodium sulfite digestion at a ph of about 10.5 to 11.5 and preferably about 10.8 to 11.2 and a caustic-sulfite weight ratio of 1:1 to 1:3 followed by a bleaching sequence of DcEDH or DcEDD. This results in a high purity low silica content fiber which has undergone very little degradation.
|
申请公布号 |
US4199399(A) |
申请公布日期 |
1980.04.22 |
申请号 |
US19780954668 |
申请日期 |
1978.10.25 |
申请人 |
PROCESS EVALUATION & DEV CORP |
发明人 |
VILLAVICENCIO, EDUARDO J |
分类号 |
C08B9/00;C08H8/00;(IPC1-7):D01C1/00 |
主分类号 |
C08B9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|