摘要
正丁烷氧化法制备顺酐的工艺路线主要包括氧化工艺和后处理工艺。其中后处理工艺采用邻苯二甲酸二丁酯(DBP)作为溶剂具有顺酐收率高、加工成本低、生产操作较为简单、生产连续性好以及生产废水少的优势。溶剂再生系统是该工艺中重要的一部分,其目的是分离贫溶剂中的富马酸、苯酐、邻苯二甲酸、邻苯二甲酸单丁脂、水溶性重油以及不溶物等。溶剂再生系统包括溶剂水萃取系统、离心分离系统和溶剂回收塔系统。水洗+离心的DBP溶剂再生工艺可以有效提高溶剂的处理效率,同时减少废水中的化学需氧量(COD)。
The preparation of maleic anhydride by n-butane oxidation process mainly includes oxidation process and post-treatment process.The post-treatment process using dibutyl phthalate(DBP)as solvent has the advantages of high maleic anhydride yield,low processing cost,simple operation,good production continuity and less production wastewater.The solvent regeneration system is an important part of the process,which aims to separate fumaric acid,phthalic anhydride,phthalic acid,monobutyl phthalate,water-soluble heavy oil and insoluble substances from lean solvents.The solvent regeneration system includes solvent-water extraction system,centrifugal separation system and solvent recovery tower system.The process of DBP Solvent Regeneration by water washing and centrifugation can effectively improve the efficiency of solvent treatment and reduce the chemical oxygen demand of COD in wastewater.
作者
范艳斌
刘兴龙
FAN Yan-bin;LIU Xing-long(Hebei Xinqiyuan Energy Technology Development Co.,Ltd.,Cangzhou 061100,China)
出处
《精细与专用化学品》
CAS
2024年第2期49-51,共3页
Fine and Specialty Chemicals
关键词
顺酐
溶剂再生
DBP
水萃取
离心分离
maleic anhydride
solvent regeneration
DBP
water extraction
centrifugal separation
