Thermal Treatment of Crude Terephthalic Acid Recovered from Alkali Weight-Reduction Wastewater

Dong-Koo Lee; Tae-Sun Chang; Chae-Ho Shin

Journal of Industrial and Engineering Chemistry, Vol.8, No.5, 405-409, September, 2002

Export Citation

Thermal Treatment of Crude Terephthalic Acid Recovered from Alkali Weight-Reduction Wastewater

Dong-Koo Lee^{1, 2, †}, Tae-Sun Chang¹, and Chae-Ho Shin²

¹Division of Advanced Chemical Technology, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
²Department of Chemical Engineering, Chungbuk National University, Chungbuk 361-763, Korea

E-mail:

A study has been made of the thermal treatment of crude terephthalic acid (CTA) at 280 ℃ to improve above specifications of polymer-grade. CTA was recovered from alkali wastewater, which was discharged from the alkali weight-reduction processing stage of polyester textile. The trace impurities contained in the recovered CTA could be classified into inorganics such as Si, Mg, Ca, Al, Fe, Mn, Ti, Cr and K, and organics such as ketones and acid derivatives. The removal of the trace impurities by using the thermal treatment method resulted in the oxidation of organics to volatile materials, and of inorganics to the oxides. The purified terephthalic acid (PTA) obtained by way of the thermal treatment could be enhanced up to the commercial polymer-grade specifications such as ash content, colorimetric value, and transmittance.

Keywords:terephthalic acid (TPA);thermal treatment;purification of crude terephthalic acid;alkali weight-reduction wastewater

[References]

Waters E, J. Soc. Dyers Color, 66, 609 (1950)
Namboori CGG, Haith MS, J. Appl. Polym. Sci., 12, 1999 (1968)
Ibrahim NA, Am. Dyest. Reptr., 79, 87 (1990)
Shukla SR, Mathur MR, Hedaoo VB, Am. Dyest. Reptr., 86, 48 (1997)
Namboori CGG, Text. Chem. Color, 1, 50 (1969)
Shenai VA, Nayak NK, Text. Dyer Print, 25, 25 (1981)
Zeronian SH, Collins MJ, Text. Prog., 20, 1 (1989)
Shukla SR, Mathur MR, J. Appl. Polym. Sci., 75(9), 1097 (2000)
Lee DK, Chang TS, Shin CH, J. Ind. Eng. Chem., 8(4), 313 (2002)
Padhye MR, Singhi RS, Colourage, 28, 13 (1981)
Shenai VA, Nayak NK, Textile Asia, 13, 59 (1982)
Houser KD, Text. Chem. Color, 15, 70/37 (1983)
Burrows LA, Cavanaugh RK, Nagle WM, U.S. Patent, 2,636,899 (1953)
Yoshimura T, Chem. Eng., 76, 78 (1969)
Nakaoka K, Miyama Y, Matsuhisa S, Wakamatsu S, Ind. Eng. Chem. Prod. Res. Dev., 12, 150 (1973)
Gelbein AP, Sze HC, Whitehead RT, Hydrocarb. Process., 52, 209 (1973)
Allen NS, Edge M, Daniels J, Royall D, Polym. Degrad. Stabil., 62, 373 (1998)

[Related Articles]

[1] Waters E, J. Soc. Dyers Color, 66, 609 (1950)

[2] Namboori CGG, Haith MS, J. Appl. Polym. Sci., 12, 1999 (1968)

[3] Ibrahim NA, Am. Dyest. Reptr., 79, 87 (1990)

[4] Shukla SR, Mathur MR, Hedaoo VB, Am. Dyest. Reptr., 86, 48 (1997)

[5] Namboori CGG, Text. Chem. Color, 1, 50 (1969)

[6] Shenai VA, Nayak NK, Text. Dyer Print, 25, 25 (1981)

[7] Zeronian SH, Collins MJ, Text. Prog., 20, 1 (1989)

[8] Shukla SR, Mathur MR, J. Appl. Polym. Sci., 75(9), 1097 (2000)

[9] Lee DK, Chang TS, Shin CH, J. Ind. Eng. Chem., 8(4), 313 (2002)

[10] Padhye MR, Singhi RS, Colourage, 28, 13 (1981)

[11] Shenai VA, Nayak NK, Textile Asia, 13, 59 (1982)

[12] Houser KD, Text. Chem. Color, 15, 70/37 (1983)

[13] Burrows LA, Cavanaugh RK, Nagle WM, U.S. Patent, 2,636,899 (1953)

[14] Yoshimura T, Chem. Eng., 76, 78 (1969)

[15] Nakaoka K, Miyama Y, Matsuhisa S, Wakamatsu S, Ind. Eng. Chem. Prod. Res. Dev., 12, 150 (1973)

[16] Gelbein AP, Sze HC, Whitehead RT, Hydrocarb. Process., 52, 209 (1973)

[17] Allen NS, Edge M, Daniels J, Royall D, Polym. Degrad. Stabil., 62, 373 (1998)