发明名称 |
Partiell autokaustifisering av alkaliske opplösninger for tremassedannelsesprosesser |
摘要 |
<p>A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide is regenerated from sodium carbonate-containing smelts in such pulp processes by autocausticization through the addition of limited amounts of borate. Autocausticization may be carried out at boron to carbonate molar ratios below 2:1 and at sodium to boron molar ratios exceeding 3:1, resulting in high reaction efficiency. Partial autocausticization using borate may also be combined with conventional lime recausticization for the regeneration of sodium hydroxide from sodium carbonate-containing smelts.</p> |
申请公布号 |
NO20006075(A) |
申请公布日期 |
2001.01.24 |
申请号 |
NO20000006075 |
申请日期 |
2000.11.30 |
申请人 |
U S BORAX INC |
发明人 |
TRAN, HONGHI N;BAIR, CHARLES M;MCBROOM, ROBERT B |
分类号 |
D21C3/02;D21C11/00;D21C11/04;(IPC1-7):D21C |
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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