Removal of sodium thiosulphate from partially oxidized white liquor and use of the thiosulphate-lean solution in bleaching

被引：0

作者：

Jemaa, N ^{[1
]}

Duhamel, M ^{[1
]}

van Lierop, B ^{[1
]}

Paleologou, M ^{[1
]}

Thompson, R ^{[1
]}

Berry, R ^{[1
]}

Brown, C ^{[1
]}

Sheedy, M ^{[1
]}

机构：

[1] Pulp & Paper Res Inst Canada, Pointe Claire, PQ H9R 3J9, Canada

来源：

2001 INTERNATIONAL CHEMICAL RECOVERY CONFERENCE: CHANGING RECOVERY TECHNOLOGY TO MEET THE CHALLENGES OF THE PULP AND PAPER INDUSTRY | 2001年

关键词：

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

White liquor is a possible alkali source for oxygen delignification or bleaching. However, to deliver full value in bleaching extraction stages, white liquor should not contain partial oxidation products. Complete oxidation of white liquor requires significantly higher temperatures and pressures than partial oxidation and requires higher-grade metallurgy. An alternative to complete oxidation is to remove sodium thiosulphate from partially oxidized white liquor. This separation can be achieved by using ion-exchange technology. During pilot unit trials of this sodium thiosulphate removal (STR) system, about 93% of the sodium thiosulphate was removed. Traces of sodium sulphide present in the liquor were also removed efficiently. The caustic solution recovered from the partially oxidized white liquor was evaluated in a DOEpD1E2D2 bleaching sequence and was found to perform as well as fresh sodium hydroxide.

引用

页码：147 / 153

页数：5

共 14 条

[1]

AYALA V, 1990, TAPP OXYG DEL S TOR, P153

[2]

AYTON J, 1991, PAPTAC PAC COAST W B

[3]

Brown C.J., 1987, U.S. patent, Patent No. [4673507, 4,673,507]

[4]

CLARKE SJ, 1998, 376 MR

[5]

FISKARI J, 1997, 1997 TAPPI PPERA STU, P19

[6]

GALLUCH RJ, 1998, PAPTAC 84 ANN M PAPT, pA173

[7]

HURST MM, 1997, TAPPI PULP C, P111

[8]

Jemaa N, 1999, PULP PAP-CANADA, V100, P47

[9]

Magnolia V.L., 1996, U.S. pat., Patent No. [5,500,085, 5500085]

[10]

Paleologou M, 1999, PULP PAP-CANADA, V100, P34

← 1 2 →