Invention Grant
US3668063A Removal of entrained air from cellulose pulp before bleaching of the pulp
失效
从浆液漂白之前从纤维素浆中除去被吸入的空气
- Patent Title: Removal of entrained air from cellulose pulp before bleaching of the pulp
- Patent Title (中): 从浆液漂白之前从纤维素浆中除去被吸入的空气
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Application No.: US3668063DApplication Date: 1971-04-01
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Publication No.: US3668063APublication Date: 1972-06-06
- Inventor: ENGSTROM HANS-ERIK
- Applicant: SUNDS AB
- Assignee: Sunds Ab
- Current Assignee: Sunds Ab
- Priority: SE1546367 1967-11-10
- Main IPC: D21C9/147
- IPC: D21C9/147 ; D21C9/10 ; D21C3/26
Abstract:
Preliminary to being delivered by a ''''thick stock pump'''' means to a generally vertical bleaching vessel there is added to a cellulose pulp a fluid, such as steam, oxygen or a gaseous bleaching agent to flow countercurrent to the pulp in such manner that any air in the pulp is displaced and is replaced by bleaching agent before bleaching of the pulp in the bleaching vessel.
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