臭氧氧化处理苯胺废水

采用臭氧氧化法处理苯胺溶液，考察了反应时间、苯胺浓度、溶液pH、臭氧流量等因素对苯胺降解率的影响。研究结果表明：初始浓度200mg／L时，pH值9．0、臭氧流量为300mg／h，经10min后苯胺去除率达到99％以上。苯胺降解反应符合一级反应动力学。TOC降解速率低于苯胺分子降解速率，反应30min后，TOC去除率比苯胺去除率低40％左右，表明伴随着苯胺的分解，生成一系列中间产物。     

PMS工程项目管理软件系统介绍

ＰＭＳ工程项目管理软件系统介绍赵显棣中国化学工程总公司北京１０００１１工程项目管理软件ＰＭＳ（ＰｒｏｊｅｃｔＭａｎ－ａｇｅｍｅｎｔｓｙｓｔｅｍ）是工程项目综合管理系统ＩＰＭＳ的重要组成部分，是实现ＩＰＭＳ的原理和方法的手段和工具。该系统以提高项目管理...     

Electrochemical copolymerization of aniline and aniline-2,5-disulfonic acid

Electrochemical copolymerization of aniline and aniline-2,5-disulfonic acid (ADSA) was carried out in HCl solutions. The presence of ADSA inhibited significantly the growth of polyaniline (PAn), although the voltammetry of the copolymer was still similar to that of conventional PAn. As the ADSA concentration increased, the deposition rate of the copolymer decreased rapidly and finally no solid film was deposited on the electrode surface. When the ADSA concentration was lower than ˜ 5 mM, the depression effect of ADSA on the growth rate of the copolymer is mainly due to its stronger adsorption at the electrode surface. For higher ADSA concentrations, the inhibiting effect of ADSA was dominated by its termination effects, which led to more soluble oligomers and in turn resulted in lower deposition efficiency. Electrolysis of ADSA solution might result in a water-soluble fully sulfonated PAn.     

新法合成三氟甲基苯乙酮

提出了利用三氟甲基苯胺重氮盐与乙醛肟合三氟甲基苯乙酮的新方法。     

碱性高锰酸钾光度法测定水中的苯胺类物质

在碱性条件下,高锰酸钾氧化苯胺引起自身颜色的变化,并且体系吸光度的变化值和苯胺的含量成正比。据此建立了光度法测定微量苯胺的新方法,方法分别选择显色波长430,610 nm和褪色波长525 nm进行测定。3波长下表观摩尔吸光系数分别为1.60×10^4L/（mol.cm）,2.09×10^4 L/（mol.cm）和2.09×10^4 L/（mol.cm）。苯胺质量浓度均在2.5-30μg/10 mL范围内符合比尔定律。将该方法用于测定水样中的苯胺含量,3波长下均获得满意结果。     

过程产物硫化氢还原硝基苯替代苯胺合成2-巯基苯并噻唑的初步探索

尝试用苯胺法合成橡胶促进剂2-巯基苯并噻唑的副产物硫化氢还原硝基苯得到苯胺,产物苯胺不经分离直接与二硫化碳、硫磺合成2-巯基苯并噻唑,硫化氢在整个体系中循环利用,还原产物单质硫又作为生产2-巯基苯并噻唑的原料。实验还原反应条件为,温度80~100℃,反应时间3~4 h,在一定压力下,硫化氢可以将硝基苯部分还原成苯胺,经检测分析知苯胺的最高收率可达6.619%。在还原后产物中直接加入溶硫液制得2-巯基苯并噻唑。该法提供了一种新的低成本、环保的2-巯基苯并噻唑的生产方法。     

4-硝基-N-[3-(2-羟乙基)砜基]苯基苯甲酰胺的合成

以3-(2-羟乙基砜基)苯胺和对硝基苯甲酸为主要原料,经过酰氯化和缩合两步反应合成了活性染料中间体4-硝基-N-[3-(2-羟乙基)砜基]苯基苯甲酰胺。研究了催化剂、卤化剂等对酰氯化反应的影响,实验得到酰氯化反应的较佳条件:DMF作催化剂,二氯亚砜作卤化剂,酰氯化产物收率可达97%。同时还考察了缩合反应较佳条件:n(3-(2-羟乙基砜基)苯胺)∶n(对硝基苯甲酰氯)=1.2∶1,反应温度30℃,反应时间2 h。在此条件下,缩合反应产物收率达到90%。产物及中间体的结构经过了IR1、H NMR鉴定。     

改性玉米芯对苯胺废水脱色处理的实验研究

针对改性玉米芯对苯胺废水的脱色特性进行了实验研究.考察了苯胺废水溶液的pH值、吸附剂用量、吸附时间、苯胺废水初始浓度对脱色效果的影响,发现主要影响因素为吸附时间、pH值及苯胺废水的初始浓度.并通过正交试验确定了改性玉米芯附剂处理苯胺废水的最佳条件.     

用浓硫酸磺化苯胺制备对氨基苯磺酸生产工艺浅析

介绍了对氨基苯磺酸的生产原理及几种磺化工艺的优缺点,并对影响磺化及产品质量的因素进行了探讨.     

Catalysts Ru–CeO2/Sibunit for catalytic wet air oxidation of aniline and phenol

Catalytic properties of carbon materials Sibunit (commercial samples) and ceria-promoted precious metals (Ru, Pt, Pd) supported on carbon were studied in the processes of catalytic wet air oxidation (CWAO) of aniline and phenol at elevated pressures and temperatures (T =433–473 K, P_O2 = 0.3–1.0 MPa). It was found that the activity increases when the catalyst is pretreated with hydrogen peroxide. An efficiency of Ru–CeO₂/Sibunit catalyst with a low ruthenium content (~0.6 Ru) for deep cleaning of polluted waters is demonstrated.