EFFECT OF SOME INHIBITORS IN THE BLEACHING OF CHEMICAL PULPS
MAGED FEKRY MAHMOUD AL-AHWANY;
Abstract
Many studies have been carried out on the effects of some
additives, particularly N-containing compounds, which were added during the chlorination and hypochlorite stages of bleaching wood pulp.
No studies seem to have been carried out on the effects of
additives during the second alkali extraction stage of CEH bleaching of dissolving pulps from agricultural residues.
The aim of the present investigation was to study the effects of aromatic amines, namely, aniline, p-toluidine and p-nitroaniline when added during the alkaline extraction stage on the yield, the chemical characteristics, the fine stucture, the chemical reactivity (xanthation) and the viscose filterability.
In the second part of this work, two alkali soluble aromatic amines were used, namely anthranilic and sulphanilic acid. They were applied during bleaching and their effects on the yield, chemical properties, fine structure, chemical reactivity (xanthation) and viscose filterability were studied.
Also, the effects of p-cresol, p-nitrophenol and pyrogallol as additives in
the second step of CEH bleaching were investigated. The results were compared with those obtained before with phenol.(219)
additives, particularly N-containing compounds, which were added during the chlorination and hypochlorite stages of bleaching wood pulp.
No studies seem to have been carried out on the effects of
additives during the second alkali extraction stage of CEH bleaching of dissolving pulps from agricultural residues.
The aim of the present investigation was to study the effects of aromatic amines, namely, aniline, p-toluidine and p-nitroaniline when added during the alkaline extraction stage on the yield, the chemical characteristics, the fine stucture, the chemical reactivity (xanthation) and the viscose filterability.
In the second part of this work, two alkali soluble aromatic amines were used, namely anthranilic and sulphanilic acid. They were applied during bleaching and their effects on the yield, chemical properties, fine structure, chemical reactivity (xanthation) and viscose filterability were studied.
Also, the effects of p-cresol, p-nitrophenol and pyrogallol as additives in
the second step of CEH bleaching were investigated. The results were compared with those obtained before with phenol.(219)
Other data
| Title | EFFECT OF SOME INHIBITORS IN THE BLEACHING OF CHEMICAL PULPS | Other Titles | تأثير بعض المثبطات اثناء تبييض اللب الكيميائى | Authors | MAGED FEKRY MAHMOUD AL-AHWANY | Issue Date | 1997 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| B13406.pdf | 1 MB | Adobe PDF | View/Open |
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