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Study on the Catalytic Synthesis of Acrylamide from the Hydration of Acrylonitrile

Author: HuangXiuChuan
Tutor: HuChangWei
School: Sichuan University
Course: Physical and chemical
Keywords: Acrylonitrile Acrylamide Nitrile hydratase Coprecipitation Catalytic Distillation
CLC: TQ226
Type: Master's thesis
Year: 2004
Downloads: 184
Quote: 0
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Abstract


As used herein the nitrile hydratase of Rhodococcus rhodochrous J1 and coprecipitation the copper two catalysts used in the synthesis of acrylamide of acrylonitrile catalytic hydration reaction using a catalytic distillation process improvements . Orthogonal experiments by the hydratase optimum reaction conditions, namely : a pH of 7.0 to 8.0 and a temperature of 28 to 30 ° C , diluted 5-fold bacterial AN concentration of 7 % The reaction time was 120s , and then in the under the conditions of the enzyme stability test , the results show the high stability of the enzyme in this article under optimized conditions , the enzyme activity higher than the current value 600u/ml about good economic benefits . preparation of a series of copper-based catalyst study found that co - precipitated copper-based catalyst having good catalytic activity , and then discuss the feeding method , Cu / Al impact on the the AN conversion rate and the AM selectivity to give the best catalyst preparation conditions , i.e. by alkali single stream feed , Cu / Al of 40/60 In this case , the activity of the catalyst is preferably a maximum AN conversion rates of up to 90.9% , the highest AM selectivity was 99.1% ; series of coprecipitated copper - based catalyst using XRD and TPR the characterization of its catalytic performance , i- LT ; WP = 3 GT ; Sichuan University Journal depth to study results showed that the catalytic activity of the catalyst and the malachite and hydrotalcite crystal phase particle size , the ratio between the two closely related . Both small particle size, the proportion to the catalyst activity is high . The synthesis of acrylamide by catalytic distillation , optimization of the process conditions and of its reason , the optimum reaction conditions are obtained under the conditions of this article ; feed feed water nitrile molar ratio of 5 to 7:1 catalyst bed from the lower portion of the reaction zone The height 400mm reaction temperature from 80 to 110 ° C . The AN's conversion rate of up to 98 % , the AM selectivity was 100% .

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic nitrogen-containing compounds
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