葡醛内酯生产中母液的综合处理方法及装置

Comprehensive processing method and apparatus for mother solution in production of glucurolactone

Abstract

本发明公开一种葡醛内酯生产中母液的综合处理利用方法及用于该方法的装置,将母液送入蒸馏釜加热蒸出酯、乙醇和乙酸的混合液至母液波美度40-50,混合液经冷凝器冷凝后进入储槽中备用;混合液送入中和浓缩釜中,加入纯碱或液碱中和至pH5-7左右,加热蒸出稀乙醇至波美度20-40,冷却结晶、脱水得醋酸钠;稀乙醇进入提浓塔提浓后供葡醛内酯生产使用;蒸馏釜内剩余母液放入浓母液槽直接用于生产草酸。本发明处理方法工艺简化,节省人工,成本低,能耗小,操作简便,可使母液中的有机物全部回收利用,变废为宝。
The invention discloses a method for comprehensively treating and utilizing a mother solution in the production of glucurolactone and a device using the method. The mother solution is sent to a distillation kettle, is heated and is evaporated with a mixed solution of ester, ethanol and acetic acid till the Baume degree of the mother solution is between 40 and 50; the mixed solution is condensed through a condenser and enters a storage tank for standby; the mixed solution is sent to a neutralization and condensation kettle, is added with pure alkali or liquid alkali, is neutralized till the PH value is between 5 and 7 around, is heated and is evaporated with thin ethanol till the Baume degree is between 20 and 40; the mixed solution is cooled, crystallized and dehydrated to obtain sodium acetate; the thin ethanol enters a concentration tower, is concentrated and is supplied to the production of glucurolactone; and the residual mother solution in the distillation kettle is put to a thick mother solution tank and is directly used for producing oxalic acid. The treatment method simplifies a process, saves labor, has low cost, small energy consumption and convenient operation, can fully recycle organisms in the mother solution and can change waste to valuable.

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Cited By (6)

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    CN-103058864-AApril 24, 2013淮安万邦香料工业有限公司Method for synthesizing benzyl acetate by production waste acid of delta-decanolactone or delta-dodecalactone
    CN-103664573-AMarch 26, 2014湖北益泰药业有限公司乙酸废气碱吸收制备乙酸钠的方法
    CN-103664573-BJune 01, 2016湖北益泰药业有限公司乙酸废气碱吸收制备乙酸钠的方法
    CN-104610386-AMay 13, 2015湖北益泰药业有限公司一种提高葡醛内酯生产收率的方法
    CN-105481649-AApril 13, 2016中国石油化工股份有限公司, 中国石油化工股份有限公司北京化工研究院Method for preparing ethanol through hydrogenating acetic acid
    CN-105481649-BAugust 25, 2017中国石油化工股份有限公司, 中国石油化工股份有限公司北京化工研究院一种乙酸加氢制备乙醇的方法