发明名称 |
Partial autocausticization of alkali liquors for wood pulping processes |
摘要 |
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. |
申请公布号 |
AU4324099(A) |
申请公布日期 |
1999.12.20 |
申请号 |
AU19990043240 |
申请日期 |
1999.05.28 |
申请人 |
U.S. BORAX INC. |
发明人 |
CHARLES M. BAIR;ROBERT B. MCBROOM;HONGHI N. TRAN |
分类号 |
D21C3/02;D21C11/00;D21C11/04 |
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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