正辛醇.doc

【摘要】：本论文采用并流共沉淀法制备了一系列正辛醇脱氢催化剂，并用C1化学催化剂评价装置考察了该系列催化剂的反应活性。采用管式连续流动固定床积分反应器，对正辛醇在该系列催化剂上的气相脱氢反应规律做了一定的研究。考察了逐渐增大Cu、Al的含量以及改变配方添加不同量Mn、Cr时催化剂的催化性能，以及不同反应温度、进料速率等实验条件对催化剂活性的影响。结果表明，此系列催化剂对正辛醇脱氢反应生产的正辛醛的选择性较高，反应温度在300℃时正辛醛的选择性最好；随着温度升高，正辛醇的转化率升高，正辛醛选择性升高，但是正辛烯等副产物选择性也升高。进料速率在0.03ml/min-0.09ml/min范围时正辛醇的转化率随流量的增加而增加，但是正辛醛的选择性在0.05ml/min时出现最大值。 关键词：正辛醇；正辛醛；催化剂；脱氢；选择性；转化率 [ Abstract ]: This paper adopts the flowing and coprecipitation method for preparing a series of octanol dehydrogenation catalyst, and C1chemical catalyst evaluation unit examines the series catalysts. A tubular continuous flow integral fixed-bed reactor, on octanol in the catalysts for gas phase dehydrogenation law to do some research. Study of Cu, Al gradually increased with the increasing of content as well as changes in formulations added with different levels of Mn, Cr when the catalytic performance of the catalyst, and reaction temperature, feeding rate and other experimental conditions effect on catalyst activity. The results show that, this series of catalysts for the dehydrogenation reaction of octanol production aldehyde selectivity is high, the reaction temperature at 300 ℃aldehyde selective best; with the increase of temperature, the conversion rate of octanol increased aldehyde, selective increase, but it octene by-products such as selective also elevated. The feed rate is in the range of 0.03ml/min-0.09ml/min when octanol conversion rate increases with the flow rate, but the aldehyde selectivity in0.05ml/min maximum. Key words: octanol; aldehyde ;catalysts,dehydrogenation;selection;conversion; 1.前 言 1.1正辛醛、正辛醇简介 正辛醇是无色油状液体,有刺激性气味不溶于水，溶于乙醇、乙醚、氯仿用于生产增塑剂、萃取剂、稳定剂，用作溶剂和香料的中间体。在增塑剂领域，辛醇一般是指2-乙基乙醇，百万吨级的大宗原料，在工业上远比正辛醇更有价值。辛醇本身也用作香料，调合玫瑰，百合等花香香精，作为皂用香料。带显著油腻气味的无色或淡黄色液体微溶于水，溶于乙醇在香料工业上用于配制玫瑰、香石竹、橙花、桔香古龙等型香精，在食品工业上用以产生甜橙香气。可由正辛醇催化脱氢，正辛酸和甲酸混合物通过二氧化钛催化剂，或正辛酸通过镍催化剂而得。正辛酸和甲酸混合物通过二氧化钛催化剂，或正辛酸通过镍催化剂而[9]等过程；在精细有机化工领域，主要用于醇类的催化脱氢制取相应的酮、醛、酸等化工原料、中间体或产品。醇类脱氢催化剂经历了由均相到多相、从高温到中低温、从氧化物催化剂到分子筛以及仿生和生物酶催化剂、从低活性低转化率到