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Application of a New Chelating Agent in Deinked Pulp Bleaching

C. X. Yu

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Abstract

The sodium citrate and sodium silicate were used as another kind of chelating agent for the pre-treatment of DIP,which would be bleached by FAS(F) later,then contrasted with the chelation of EDTA.The results showed that the sodium citrate can be used as a chelating agent in place of EDTA.The optimum conditions for the pretreatment of DIP by the sodium citrate are as follows,sodium citrate dosage 0.8%,pre-treated time 30 min,pre-treated temperature 70℃,pH 8.By using the Sodium Citrate as the chelating agent,after the two-stage bleaching of P-F,the brightness of DIP could reach 77.67%(ISO).

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What this paper is about

The sodium citrate and sodium silicate were used as another kind of chelating agent for the pre-treatment of DIP,which would be bleached by FAS(F) later,then contrasted with the chelation of EDTA.The results showed that the sodium citrate can be used as a chelating agent in place of EDTA.The optimum conditions for the pretreatment of DIP by the sodium citrate are as follows,sodium citrate dosage 0.8%,pre-treated time 30 min,pre-treated temperature 70℃,pH 8.By using the Sodium Citrate as the chelating agent,after the two-stage bleaching of P-F,the brightness of DIP could reach 77.67%(ISO).

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Available abstract

The sodium citrate and sodium silicate were used as another kind of chelating agent for the pre-treatment of DIP,which would be bleached by FAS(F) later,then contrasted with the chelation of EDTA.The results showed that the sodium citrate can be used as a chelating agent in place of EDTA.The optimum conditions for the pretreatment of DIP by the sodium citrate are as follows,sodium citrate dosage 0.8%,pre-treated time 30 min,pre-treated temperature 70℃,pH 8.By using the Sodium Citrate as the chelating agent,after the two-stage bleaching of P-F,the brightness of DIP could reach 77.67%(ISO).

Key concepts: Chelation, Sodium citrate, Chemistry, Sodium, Sodium silicate, Nuclear chemistry, Citric acid, Inorganic chemistry

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