以硝基苯为萃取剂从水中回收苯胺工艺技术研究  

Study on technology of the recycling of aniline from water phase taking nitrobenzene as extractant

作　　者：程延华[1] 韩雪梅[2] 韩小平[1] 

机构地区：[1]中国石油吉林石化公司研究院,吉林吉林132021 [2]中国石油吉林石化公司,吉林吉林132021

出　　处：《化工科技》2013年第6期36-38,共3页Science & Technology in Chemical Industry

摘　　要：介绍了采用硝基苯为萃取剂,从水中回收苯胺的工艺过程,进行了溶剂比、萃取级数、萃取温度对萃取效果的影响实验,确定了适宜的工艺条件。由于硝基苯为苯胺的生产原料,以其为萃取剂无需再生,可将萃取相直接加氢生产苯胺。通过三级逆流萃取,可使萃取后水中w(苯胺)由3.6%降至0.003 0%,苯胺回收率达到99.9%以上。This text introduced that dibasic esters（DBE） were prepared by using mixed dibasic acids （DBA） and methanol as raw materials and NKC-9 as catalyst through pre-esterification and continuous esterification. The result showed that when the amount of NKC-9（calculation by mixed dimethyl me- ter,mass fraction） is 8%, the conversion rate of mixed dimethyl esters pre-esterification is more than 70% and continuous esterification conversion rate is more than 90% and general conversion rate is more than 97%. The optimal reaction conditions are that pre-esterification： the amount of catalyst 8%; n（methanol） ： n（mixed dimethyl acid） =2. 5 ： 1 ; reaction temperature： 80--85 ℃ ; reaction time 3 hl continuous esterification：liquid space velocity 0. 37--1.47 h-1 ;mole ratio of alcohol--25.14.

关 键 词：萃取 苯胺 硝基苯 回收 

分 类 号：X703.1[环境科学与工程—环境工程]