发明名称 |
FORFARANDE VID OZONBEHANDLING AV RAFFINORMASSA OCH TERMOMEKANISK MASSA |
摘要 |
When treating refined mechanical pulp and thermo mechanical pulp with ozone, it is of great importance that the process be carried out at the most favorable conditions and with a minimum consumption of energy. According to the present invention the pulp is refined to a freeness value of at least 200 csf in a first stage refiner from which the pulp is passed to a high consistency ozonizer and maturation reactor for a time limited to maximum 30 minutes. From the reactor the pulp is passed direct to a second stage refiner, the pulp then having a solids content of approximately 8-10% and an alkaline value in the range of 7-10. |
申请公布号 |
SE435301(B) |
申请公布日期 |
1984.09.17 |
申请号 |
SE19780010620 |
申请日期 |
1978.10.11 |
申请人 |
MYRENS VERKSTED AS |
发明人 |
N * SOTELAND;B H * FRITZVOLD |
分类号 |
D21C3/22;D21C9/10;D21D1/20;(IPC1-7):21C9/00;21B1/16 |
主分类号 |
D21C3/22 |
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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