scholarly journals Analysis of a Model Reaction System Containing Cysteine and (E)-2-Methyl-2-butenal, (E)-2-Hexenal, or Mesityl Oxide

2006 ◽  
Vol 54 (21) ◽  
pp. 8390-8390
Author(s):  
Christian Starkenmann
Keyword(s):  
Reaction System ◽  
Model Reaction ◽  
Mesityl Oxide

Stereochemistry of asymmetric “(net) hydride transfer” in an intercoenzyme model reaction system

1994 ◽  
Vol 35 (46) ◽  
pp. 8631-8634 ◽  
Author(s):  
Tetsuji Kawamoto ◽  
Toru Taga ◽  
Kiyoshi Bessho ◽  
Fumio Yoneda ◽  
Jun-ichi Hayami
Keyword(s):  
Reaction System ◽  
Hydride Transfer ◽  
Model Reaction

Important role of Fe(III)TPP-oxygen-skatole ternary complex in tryptophan dioxygenase model reaction system

1990 ◽  
Vol 172 (1) ◽  
pp. 83-91 ◽  
Author(s):  
Kunihiko Tajima ◽  
Miwa Yoshino ◽  
Kohichi Mikami ◽  
Takeshi Edo ◽  
Kazuhiko Ishizu ◽  
...  
Keyword(s):  
Ternary Complex ◽  
Reaction System ◽  
Model Reaction ◽  
Tryptophan Dioxygenase

scholarly journals DEVELOPMENT OF REACTION-RECTIFICATION PROCESS OF OBTAINING MESITYL OXIDE. I. SIMULATION OF KINETICS AND PHASE EQUILIBRIUM IN THE REACTION SYSTEM

2018 ◽  
Vol 13 (5) ◽  
pp. 5-13 ◽  
Author(s):  
M. A. Yakhyaev ◽  
V. S. Gutenkov ◽  
Yu. A. Pisarenko
Keyword(s):  
Phase Equilibrium ◽  
Chemical Transformation ◽  
Equilibrium Model ◽  
Equilibrium Constants ◽  
Reaction System ◽  
Mesityl Oxide ◽  
Chemical Information ◽  
Thermochemical Parameters ◽  
Physical And Chemical ◽  
Rectification Process

Mesityl oxide is an important product of organic synthesis, which is used in the manufacture of pharmaceuticals and as a solvent. The demand for mesityl oxide is growing, which determines the need for further improvement of its production. The disadvantages of the traditional methods of obtaining mesityl oxide are low values of reagent conversion and selectivity. To eliminate them, it is proposed to obtain mesityl oxide in a combined reaction-rectification process. The combination of chemical transformation and separation of the resulting reaction mixture by means of rectification in one apparatus allows for a continuous withdrawal of the formed products from the reaction zone, which increases the rate of the target reaction, conversion and selectivity. In accordance with the modern strategy for the development of chemical-technological processes, the collection and processing of physical and chemical information on the properties of the components and mixtures contained in the reaction system was performed. Based on the experimental data, the parameters of the phase equilibrium model are determined, and its adequacy is estimated. The phase equilibrium model was used to construct a distillation diagram, to verify its consistency, and to conduct computational studies of the reaction-rectification process. The thermochemical parameters of the target reactions are calculated, the equilibrium constants are determined, and their temperature dependence is established. On the basis of the analysis of the literature data, a kinetic model of the process is proposed, and the conditions favorable for the course of the desired chemical transformation are determined with the use of this model. The obtained data are necessary for carrying out the analysis of the statics, constructing the basic technological scheme and calculating its static parameters.

Scavenging of Acrolein by Food-Grade Antioxidant Propyl Gallate in a Model Reaction System and Cakes

2019 ◽  
Vol 67 (31) ◽  
pp. 8520-8526 ◽  
Author(s):  
Jiaqi Wang ◽  
Yongling Lu ◽  
Tiesong Zheng ◽  
Shengmin Sang ◽  
Lishuang Lv
Keyword(s):  
Propyl Gallate ◽  
Reaction System ◽  
Model Reaction ◽  
Food Grade

Stochastic analysis of model reaction system : The occurrence of noise induced transitions

1986 ◽  
Vol 41 (4) ◽  
pp. 891-898 ◽  
Author(s):  
N.S. Dabke ◽  
B.D. Kulkarni ◽  
L.K. Doraiswamy
Keyword(s):  
Stochastic Analysis ◽  
Reaction System ◽  
Model Reaction

scholarly journals Development of Reaction-Rectification Process of Obtaining Mesityl Oxide. II. Analysis of Statics and Modeling of the Process

2019 ◽  
Vol 14 (2) ◽  
pp. 23-32
Author(s):  
M. A. Yakhyaev ◽  
V. S. Gutenkov ◽  
C. A. Cardona ◽  
Yu. A. Pisarenko
Keyword(s):  
Phase Equilibrium ◽  
Stationary State ◽  
Basic Equation ◽  
Process Model ◽  
Reactive Distillation ◽  
Reaction System ◽  
Practical Interest ◽  
Mesityl Oxide ◽  
Target Product ◽  
Distillation Process

Using the results of an earlier study of the physicochemical properties of the reaction system of the process of producing mesityl oxide, an analysis of the statics of the combined variant of the organization of this process was carried out. It is shown that of practical interest are the modes of the process corresponding to the first specified separation. In this case, the limiting stationary states, characterized by the maximum acetone conversion, selectivity, and the yield of the target product — mesityl oxide, are distinguished. The possibility of practical implementation of the limiting stationary state of the reactive distillation process for producing mesityl oxide, which provides almost complete conversion of acetone with a yield of mesityl oxide approaching 100%, has been proved. The limit stationary state corresponds to the reaction-distillation process with the selection of a single product stream. For the mode of carrying out the combined process that corresponds to the selected limiting stationary state, a schematic flow chart for the production of the target product has been proposed. By means of computational research, it has been established that the most rational option for organizing a reaction hub is to use a single apparatus in it — the reaction-distillation column. In the Aspen Plus® software package, a process model was constructed that corresponded to the proposed technological scheme and through a computational experiment, its structural and parametric optimization was carried out. As a result, the static parameters of the technological system were established, as well as the characteristics of the apparatuses, allowing to obtain the required quality product in the reactiondistillation column. output, approaching 100%. It has been shown that when modeling a chemicaltechnological system, it is necessary to use different sets of parameters of the basic equation used to describe phase equilibrium. Thus, for calculating reactive distillation and distillation columns, the liquid – vapor phase equilibrium parameters for the mesityl oxide–water system should be used, and when calculating the Florentine vessel for this mixture, it is necessary to use the parameters corresponding to the liquid – liquid equilibrium. The use of a single set of parameters of the basic equation leads to significant errors and inadequate description of the process of producing mesityl oxide by condensation of acetone.

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