发明名称 |
Process for making refiner mechanical pulp |
摘要 |
A process for making a refiner mechanical pulp from wood chips which comprises: (a) Comminuting the wood chips largely by splitting along the wood grain; (b) Wetting said particles with a solution of a sulphite salt of an alkali metal to add an amount of said alkali metal salt within the range of 1% to 10% of the oven dry weight of said particles, said solution having a pH within the range of 7 to 12.5; (c) Steam heating the sulphite salt solution bearing particles to a temperature within the range between 80 DEG C. and 165 DEG C. and holding them within that temperature range for a period of 0.5 to 80 minutes; (d) Passing the particles, after said period of heating, through a disc refiner to produce refiner mechanical pulp.
|
申请公布号 |
US4259148(A) |
申请公布日期 |
1981.03.31 |
申请号 |
US19800116852 |
申请日期 |
1980.01.30 |
申请人 |
THE PRICE COMPANY LIMITED |
发明人 |
BEATH, LAURENCE R.;MIHELICH, WALTER G. |
分类号 |
D21C3/00;D21B1/02;D21C3/22;(IPC1-7):D21C3/04 |
主分类号 |
D21C3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|