Chemical Industry and Engineering Progree ›› 2016, Vol. 35 ›› Issue (05): 1544-1548.DOI: 10.16085/j.issn.1000-6613.2016.05.042

• Resource and environmental engineering • Previous Articles     Next Articles

Study on extraction and adsorption treatment of aldolisation spent caustic

MA Kecun1, LI Xiangfu2, ZUO Yanmei1   

  1. 1. Daqing Petrochemical Research Center of PetroChina, Daqing163714, Heilongjiang, China;
    2. Sichuan Petrochemical Co., Ltd. of PetroChina, Chengdu 611930, Sichuan, China
  • Received:2015-11-10 Revised:2015-12-23 Online:2016-05-05 Published:2016-05-05

萃取-吸附法处理辛醇废碱液

马克存1, 李向富2, 左艳梅1   

  1. 1. 中国石油大庆化工研究中心, 黑龙江 大庆 163714;
    2. 中国石油四川石化有限责任公司, 四川 成都 611930
  • 通讯作者: 马克存(1978-),男,工程师,硕士,主要从事石油化工废水处理技术研究。E-mail mkc459@petrochinan.com.cn。
  • 作者简介:马克存(1978-),男,工程师,硕士,主要从事石油化工废水处理技术研究。E-mail mkc459@petrochinan.com.cn。

Abstract: Extraction and adsorption was adopted in sequence to remove the large amount of organics in the aldolisation spent caustic, wherein 2-ethyl hexanol was used as extractant which was then recovered by rectification, and HYA-106 macroporous resin was used for adsorption which showed stable adsorption-desorption performance. The results showed that under the conditions of pH=3, the volume ratio of 2-ethyl hexanol to spent caustic was 0.5 and the extraction stages was 2, ρ(COD) of the spent caustic could be decreased from 104651mg/L to 6453mg/L, while the ρ(COD) removal rate reached over 93.8%. At 40℃, the adsorption rate of HYA-106 macroporous adsorption resin was 1BV/h, ρ(COD) of the extraction effluent was decreased to 155-183mg/L, while ρ(COD) removal rate was 97.1%-97.4%. The total ρ(COD) removal rate of the combined extraction and adsorption process reached more than 99.8%, showing the organics in the spent caustic was removed to a maximal extent.

Key words: extraction, adsorption, regeneration, macroporous adsorption resin, 2-ethyl hexanol, spent caustic

摘要: 辛醇废碱液中含有大量有机物,为此开展了萃取-大孔树脂吸附法处理辛醇废碱液、高效回收有机物的实验研究,实验结果表明:当辛醇废碱液的ρ(COD)为104651mg/L时,以辛醇为萃取剂,在pH=3、辛醇与辛醇废碱液的体积比为0.5、萃取级数为2等条件下,出水ρ(COD)可降至6453mg/L以下,COD去除率达到93.8%以上,萃取剂辛醇可以通过精馏再生循环利用;采用HYA-106大孔吸附树脂对辛醇二级萃取出水进行吸附处理,HYA-106大孔吸附树脂较佳的吸附流速为1BV/h、温度为40℃,此时出水ρ(COD)平均在155~183mg/L之间,COD去除率在97.1%~97.4%之间,单位体积树脂的废水处理量为34BV以上,树脂吸附量在213~215mgCOD/mL树脂之间,吸附-解吸效果稳定;萃取-吸附工艺的COD总去除率达到99.8%以上,最大程度地实现了辛醇废碱液中有机物的回收。

关键词: 萃取, 吸附, 再生, 大孔吸附树脂, 辛醇, 废碱液

CLC Number: 

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