发明名称 |
High yield semichemical wood pulping process |
摘要 |
70 To 85% yield semichemical wood pulping may be prepared for mechanical defibration by cooking comminuted hardwood in a continuous digestion vessel with an alkaline cooking solution wherein 50 to 100% as sodium oxide thereof is sodium carbonate. The solution may be formulated from unmodified kraft recovery process green liquor or, if a sulfur free cooking process is desired, the solution may be formulated from soda ash.
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申请公布号 |
US4073678(A) |
申请公布日期 |
1978.02.14 |
申请号 |
US19770759455 |
申请日期 |
1977.01.14 |
申请人 |
WESTVACO CORPORATION |
发明人 |
HAMMOND, JACK A.;KARTER, ELIAS M. |
分类号 |
D21C3/02;D21C11/00;D21C11/04;(IPC1-7):D21C3/02;D21C3/24 |
主分类号 |
D21C3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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