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Preparation of Sodium Carboxymethyl Cellulose from Paper Sludge by Xiaojia He; Shaozu Wu; Dongkang Fu; Jinren Ni is a Engineering article available to read on EtoBox.

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## Abstract **BACKGROUND:** This paper describes the reuse of paper sludge, an industrial solid waste, for the preparation of sodium carboxymethyl cellulose (CMC). The process includes pretreatment, basification and etherification. **RESULTS:** The optimal pretreatment condition involved the addition of 6.7% hydrochloric acid to the paper sludge for 30 min at 70 °C. The order of factors influencing the effect of reaction was: etherification temperature > sodium hydroxide dose > basification temperature > etherification time > sodium chloroacetate dose. The optimal preparation condition of CMC was: m~papersludge~: m~sodiumhydroxide~: m~sodiumchloroacetate~ = 0.9:0.8:1.15; basification at 40 °C; etherification at 60 °C for 1 h. Under these conditions, certified CMC with viscosity less than 20 mPa· s, DS more than 0.50 and purity more than 90% was produced. The results of Fourier transform infrared (FTIR) and X‐ray diffraction (XRD) spectra analyses indicated that the product has characteristics of high degree of substitution (DS) and low crystallinity. The coated paper using CMC prepared from paper sludge as a water retention agent can meet the quality standards of GB/T 10335.1‐2005.

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Author

Xiaojia He; Shaozu Wu; Dongkang Fu; Jinren Ni

Publisher

Wiley

Published

2008

Language

EN

Field

Engineering (Physical Sciences)