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    • 10. 发明授权
    • System and method for reduction of water consumption in purified terephthalic acid production
    • 降低纯对苯二甲酸生产用水的系统和方法
    • US08382961B2
    • 2013-02-26
    • US12801385
    • 2010-06-07
    • Ji-Young JangKuang-Yeu WuMing-Mou Yang
    • Ji-Young JangKuang-Yeu WuMing-Mou Yang
    • B01D11/00
    • B01D3/36B01D3/143B01D3/40
    • The invention disclosed is an apparatus and method for the recovery of acetic acid, azeotropic agent, extraction agent, re-usable water and other reaction products such as p-toluic acid, from an aqueous stream generated during a terephthalic acid production process, having superior energy efficiency and reduced water consumption. The apparatus of the invention includes: an azeotropic distillation column to remove water from acetic acid, a pair of mother liquor extraction columns sequentially connected in series for primary recovery of extraction solvent and other organics, an azeotropic agent stripper for recovery of azeotropic agent and a post-separation solvent stripper distillation column for further separation of the aqueous bottoms stream from said extraction columns into a volatiles stream comprising mainly organics with a very low amount of water and a liquid stream comprising water containing very low amounts of organics, each stream being sufficiently pure that it can be recycled for reuse in the purification of crude terephthalic acid.
    • 本发明公开了一种用于从对苯二甲酸生产过程中产生的水流中回收乙酸,共沸剂,萃取剂,可再利用的水和其它反应产物如对甲苯甲酸的装置和方法,具有优异的 能效和减少用水量。 本发明的装置包括:用于从乙酸中除去水的共沸蒸馏塔,一系列串联连续串联用于初级回收提取溶剂和其它有机物的母液萃取塔,用于回收共沸剂的共沸剂汽提塔和 分离后溶剂汽提塔蒸馏塔,用于将含水塔底物流从所述提取塔进一步分离成挥发物料流,其主要包含具有非常少量水的有机物和包含非常少量有机物的水的液体流,每个流充分 纯净,可以回收再利用于粗对苯二甲酸的纯化。