发明名称 |
PROCESS FOR PREPARING A PULP-COOKING SOLUTION |
摘要 |
The proposed invention deals with pulp and paper production, in particular, with the process for preparing pulp cooking liquors to manufacture a fibrous semifabricate. A cooking liquor is proposed to be prepared by saturation of a water medium with sulfurous anhydride provided that this water medium is in fact either a pulp and paper mill waste water with activated sludge (18-40g/l) and soda ash (1,55-2,50% by weight) in it or alkali hydrolyzate produced in treatment of the same waste water by a mixture of base salts containing sodium carbonate (50-90% by weight based on Na2O) at the temperature 25-40 DEG C followed up with a solid sediment removal and the saturation goes on until sulfurous anhydride concentration in the liquor is 2,5-5,5% by weight. The proposed method allows to increase considerably the output of a fibrous semi-fabricate and improve its mechanical characteristics not to speak of utilizing waste water generated at a waste water treatment plant of a pulp and paper mill and expanding a sources of raw materials needed for cooking liquors preparation. |
申请公布号 |
EP0863250(A2) |
申请公布日期 |
1998.09.09 |
申请号 |
EP19960940192 |
申请日期 |
1996.11.13 |
申请人 |
PUKANOV, VITALY VALERIEVICH;GRUDININ, VLADIMIR PAVLOVICH;GRUDININ, ALEXANDR VLADIMIROVICH |
发明人 |
GRUDININ, VLADIMIR PAVLOVICH;GRUDININ, ALEXANDR VLADIMIROVICH |
分类号 |
D21C3/06;D21C3/02;D21C3/04;D21C11/00 |
主分类号 |
D21C3/06 |
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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