Dissertation > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic carboxylic acid and its derivatives > Carboxylic acid derivatives of the function > Ester

Study on the Technology and Kinetics of the Synthesis of Isopropyl Acetate by Acetic Acid and Propylene

Author LiYouLin
Tutor CuiZuoFen;QiaoXu
School Nanjing University of Technology
Course Chemical processes
Keywords Acetic acid Propylene Isopropyl acetate Reaction kinetics
CLC TQ225.24
Type Master's thesis
Year 2006
Downloads 342
Quotes 2
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Isopropyl acetate is an important intermediate for organic synthesis, excellent alkali hydrophobic plastics, acetate fibers, and good ability to dissolve, widely used in paint, ink and adhesive agent industry. Iso-propyl acetate and ethyl acetate, butyl acetate, having similar physical and chemical properties, in many occasions, they may be used instead, can also replace butanone using isopropylacetate was called \Production of isopropyl acetate sulfuric acid catalyst esterification by acetic acid and isopropyl alcohol, isopropyl alcohol is generated by propylene hydration, and isopropyl alcohol with acetic acid esterification again need dehydration; and traditional crafts of sulfuric acid as a catalyst to cause severe corrosion of the equipment, it is difficult to recycle, and product separation difficulties; addition, due to the limitations of chemical equilibrium, lower equilibrium conversion. Direct esterification of acetic acid with propylene-step synthesis of isopropyl acetate, is an ideal atom economy reaction process route. This article studies the process Isopropyl green synthesis of acetic acid by the direct esterification of acetic acid with propylene, titanium autoclave, the effects of catalyst type and amount, reacted reaction temperature, pressure, time and stirring speed and other factors affect the suitable catalyst, a better reaction conditions: the reaction temperature was 130 ° C, the rotational speed of 800rpm, the amount of catalyst is 7.5% of the quality of Titanium, a pressure of 1.5MPa, reaction time 6H, Under this condition, acetic acid conversion rate 85.43% can be achieved, isopropyl acetate, 98.52% selectivity to propylene. The esterified product purified by distillation separation experiments, to obtain a purity of 99.8%, a colorless transparent isopropylacetate product. The synthesis of isopropyl acetate by direct esterification of acetic acid with propylene dynamics. Designed the addition during the esterification reaction of an acetic acid-catalyzed automatic measurement the propylene consumption of the device in order to obtain kinetic data in the system to maintain a constant pressure conditions, the use of a continuous feed of propylene obtained by the mass flowmeter and strict integral the instantaneous flow rate and the accumulated consumption of the propylene, the reaction temperature is 110 to 150 ° C, reaction pressure, respectively 0.63,0.84,1.0 and 1.5MPa, after the elimination of internal diffusion and outer diffuser, the establishment of quasi-homogeneous reaction kinetics model are as follows : valuation parameter by the experimental data under different reaction conditions, the reaction rate constants obtained at each temperature, and Henry coefficient. Synthesis of acetic acid in the temperature range of 110 ~ 150 ℃, acetic acid and propylene direct esterification

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