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复合型DIPA在炼厂气脱硫装置上的应用 总被引:1,自引:0,他引:1
对复合型DIPA脱硫溶剂的使用情况进行了介绍,并与DEA,MDEA等几种脱硫溶剂的使用情况作了对比,DIPA对干气和液态烃中H2S有非常好的脱除效果,脱除率分别达到了99.77%和99.51%,同时,DIPA还对干气中总硫有非常明显的脱除效果,脱除率高达99.47%,明显优于MDEA等其它几种脱硫溶剂。文章还针对炼厂气脱硫存在的问题提出了建议。 相似文献
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介绍了用PDS法替代改良ADA法煤气脱硫的操作经验,指出,在脱硫液中保持一定浓度的ADA,可使PDS获得更好的催化效果,既可提高脱硫效率和减少副产盐类的生成量,还可使生产成本下降60%。 相似文献
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ADA与栲胶混合液脱硫肖杰光(株化集团公司氮肥厂)我厂年产11万吨合成氨装置采用常压变换脱硫.投产以来,一直采用ADA脱硫。这种方法在我厂使用情况较好。但因新系统原因,1991年10且将ADA改为拷胶脱硫。1个月之后,当ADA全部被拷胶置换完时,生产... 相似文献
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通过对MDEA和DIPA两种脱溶液性质的对比,分析了重油催化脱硫系统腐蚀的原因,并提出了几种防腐蚀的对策。 相似文献
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栲胶脱硫液起泡原因分析王世芳(济南化肥厂山东省济南市,250101)我厂脱硫原为ADA法,因ADA价贵及堵塔的缺点,于1992年8月改为栲胶脱硫。改后脱硫一直比较正常。1994年底到1995年初,我厂丙碳脱碳投运。这时烤胶脱硫开始不正常,到3月底,脱... 相似文献
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双波长等吸收点法测定栲胶和ADA混合脱硫溶液中栲胶含量宋世新,于剑萍(柳州化肥厂545002)1引言栲胶法脱硫自1978年问世以来,由于其溶液具有活性好,脱硫效率高等特点获得了广泛的应用。我厂成功地进行了由改良ADA法过渡到栲胶法的工业生产试验,至今... 相似文献
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在ADA催化剂中加入PDS形成双活化剂脱硫,应用于合成氨厂或煤气厂,对提高脱硫效率,解决硫黄堵塞,降低原料消耗,减轻设备腐蚀等均有一定成效。 相似文献
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1半水煤气脱硫的流程我厂在1989年前,采取改良ADA法脱硫,最大缺点是易堵塔,且脱硫效率不稳定,回收硫磺产量也低。从1989年秋,我厂开始试用PDS+ADA复合催化法脱硫,后于1996年又改用PDS+ADA+TS—8505复合催化法脱硫至今。ADA学名为蒽醌二磺酸钠,PDS与TS—8505则都是双核钛菁钻磺酸盐。2使用PDS+ADA复合催化脱硫的情况2.1第一次改进使用初期,因无成熟的经验可借鉴,仅能依据有关技术资料,维持溶液总碱度在0.2mol/L。但实际上按此数据操作时,效果不好。主要问题… 相似文献
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文章对二嗪磷来源及危害进行了分析,也对二嗪磷污染水平及修复处理技术的研究进展进行了综述,并提出了今后主要研究方向。 相似文献
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腈菌唑在小麦,土壤上残留与降解的动态试验研究 总被引:1,自引:2,他引:1
本试验为腈菌唑在辽宁、江苏两地的两年残留测定,作物为小麦。分析目标为麦粉、麦杆、青植株、土壤,四种试材分析方法的添加回收率均为75%以上。1993年土壤的半衰期辽宁、江苏分别为27.2天和23.7天,小麦青植株的半衰期辽宁、江苏分别为2.1天和2.5天;1994年土壤的半衰期辽宁、江苏分别为25.8天和36.7天,小麦青植株的半衰期辽宁、江苏分别为4.3天和3.3天。试验施药剂量为25毫克/公斤(2.5克/亩)及50毫克/公斤(5.0克/亩)两种,在收获期小麦麦粉及麦杆中的残留量都低于参照的允许残留量0.1毫克/公斤及2.0毫克/公斤,安全间隔期为20天。分析结果表明腈菌唑对小麦使用安全。 相似文献
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Conductive and flexible polydimethylsiloxane (PDMS)/polypyrrole (PPy) composites were synthesized electrochemically. Electrochemical syntheses were performed at +1.10 V by using p‐toluene sulfonic acid (PTSA) as supporting electrolyte and water as solvent. Composites were characterized by cyclic voltammetry, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, and Fourier transform infrared spectroscopy. Conductivity measurements and mechanical tests were also performed. The observed conductivities were in the range of 3.5–7.6 S/cm, indicating that the conductivities of PDMS/PPy composites and that of pure PPy were in the same order of magnitude. Tensile tests revealed that higher percent elongation was obtained by the addition of PDMS. Highly flexible and foldable PDMS/PPy composites were successfully synthesized, which have high conductivities and improved mechanical properties. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 736–741, 2004 相似文献
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结合无机及分析化学课程的内容和特点,介绍了无机及分析化学课程教学改革的一些新举措,取得了良好的效果。主要研究内容和成果有:优化教学内容,选择合适的教材,合理安排教学进度;改进课堂教学方法和手段,将传统教学方式与多媒体教学相结合;理论与实验教学相结合,加深学生对理论知识的理解,培养学生的研究能力和创新意识。 相似文献
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P. Vijayalakshmi R. Subbarao G. Lakshminarayana 《Journal of the American Oil Chemists' Society》1991,68(2):133-137
Cycloaliphatic C21 di- and C22 tricarboxylic acids were prepared by the Diels-Alder reaction of dehydrated castor oil (DCO) fatty acids (containing 48%
conjugated and 42% nonconjugated dienes) with acrylic and fumaric acids, respectively. The reaction temperature, time, catalyst
concentration, and mole ratio of reactants were varied to get maximum yields of the di- and tricarboxylic acids. The unreacted
DCO fatty acids were removed from the products by partition between aqueous methanol and n-hexane. The products were converted
to methyl esters and characterized as the substituted cyclohexene derivatives before and after dehydrogenation with Pd/C in
xylene, hydrogenation with Pd/C in decalin and oxidation with periodate-permanganate reagent and by mass and proton nuclear
magnetic resonance spectrometry. The acids were converted to sodium soaps, mono- and diethanolamides and the corresponding
diol and triol sulfates, and the resulting products were evaluated for their surface-active properties. The sodium soaps showed
better calcium tolerance and poorer foaming power than sodium oleate. The diethanolamides were inferior to lauroyl diethanolamide
in wetting and emulsifying power. The monoethanolamides were better than the respective diethanolamides and lauroyl diethanolamide
in wetting property. The diol and triol sulfates were poorer in wetting and emulsifying ability and better in calcium tolerance
than sodium lauryl sulfate. 相似文献