A COMPARISON BETWEEN ALKALI PEROXIDE AND ACTIVATED PEROXIDE PROCESSES IN BLEACHING HARDWOODS CHEMI-MECHANICAL PULP

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ZEINALY F.; DEHGHANI M.R.

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES Year:2013 | Volume:3 | Issue:2 Page(s): 91-103

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Title

A COMPARISON BETWEEN ALKALI PEROXIDE AND ACTIVATED PEROXIDE PROCESSES IN BLEACHING HARDWOODS CHEMI-MECHANICAL PULP

Author(s)

ZEINALY F. | DEHGHANI M.R. | Issue Writer Certificate

Keywords

ALKALI PEROXIDEQ2

ACTIVATED PEROXIDEQ2

BRIGHTNESSQ2

EFFLUENT POLLUTION LOADQ2

TAEDQ2

Abstract

Unbleached chemi-mechanical pulp of 85% pulp yield and produced from hornbeam, beech and populus woods respectively by 3: 1: 1 ratio, was used for peroxide bleaching. Two bleaching systems, ALKALI PEROXIDE (conventional bleaching) and ACTIVATED PEROXIDE by TAED activator, were used for pulp bleaching. Bleaching treatments included different percentages of hydrogen peroxide and caustic soda consumption. In this research, the hydrogen peroxide consumption rate, pulp yield, process selectivity, bleached pulp BRIGHTNESS and bleaching EFFLUENT POLLUTION LOAD (COD) were investigated. Results showed that, BRIGHTNESS values were increased by bleach chemicals charge rising, in both bleaching systems, but the increasing trend was downward. Also, pulp yield was decreased by increase of chemical charges, but residual peroxide was raised. The ACTIVATED PEROXIDE process compare to conventional process had lower efficiency and BRIGHTNESS improvement values of pulp were less than those of ALKALI PEROXIDE process. But pulp yield and EFFLUENT POLLUTION LOAD was less by ACTIVATED PEROXIDE bleaching.

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References

BLEACHING OF KENAF BAST SODA PULP WITH ALKALI PEROXIDE

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APA: Copy

ZEINALY, F., & DEHGHANI, M.R.. (2013). A COMPARISON BETWEEN ALKALI PEROXIDE AND ACTIVATED PEROXIDE PROCESSES IN BLEACHING HARDWOODS CHEMI-MECHANICAL PULP. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, 3(2), 91-103. SID. https://sid.ir/paper/184234/en

Vancouver: Copy

ZEINALY F., DEHGHANI M.R.. A COMPARISON BETWEEN ALKALI PEROXIDE AND ACTIVATED PEROXIDE PROCESSES IN BLEACHING HARDWOODS CHEMI-MECHANICAL PULP. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES[Internet]. 2013;3(2):91-103. Available from: https://sid.ir/paper/184234/en

IEEE: Copy

F. ZEINALY, and M.R. DEHGHANI, “A COMPARISON BETWEEN ALKALI PEROXIDE AND ACTIVATED PEROXIDE PROCESSES IN BLEACHING HARDWOODS CHEMI-MECHANICAL PULP,” IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, vol. 3, no. 2, pp. 91–103, 2013, [Online]. Available: https://sid.ir/paper/184234/en

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