Intensification of liquid-phase processes for the synthesis of linear alkylbenzenesulfonic acids under conditions of the reaction media deactivation
Relevance. The need to improve the efficiency of production of alkylbenzenesulfonic acids as semi-finished products of synthetic detergents with good detergent characteristics and high biodegradability, the consumption of which is growing in the world market at an average annual rate of 3.3%. The u...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2025-07-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | https://izvestiya.tpu.ru/archive/article/view/5105 |
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| Summary: | Relevance. The need to improve the efficiency of production of alkylbenzenesulfonic acids as semi-finished products of synthetic detergents with good detergent characteristics and high biodegradability, the consumption of which is growing in the world market at an average annual rate of 3.3%. The use of modern methods and parameters for monitoring the state in time mode allows for the optimization of the technological process and ensures the stability of the quality of alkylbenzene sulfonic acids, conditioning the optimal activity of the traditional environment. Aim. Improvement of liquid-phase processes for obtaining alkylbenzenesulfonic acids in industrial reactors under conditions of deactivation of reaction media using non-stationary mathematical models. Object. Alkylbenzenesulfonic acid synthesis unit. Methods. Method of mathematical modeling of multicomponent non-stationary chemical-technological processes of oil refining and petrochemistry, quantum-chemical methods for calculating thermodynamic functions, numerical methods for solving systems of nonlinear differential equations. Results. The authors have developed the mathematical models of reactors for the reaction processes of benzene alkylation with olefins and alkylbenzene sulfonation, which make it possible to calculate the activity of the HF alkylation catalyst depending on the amount of heavy aromatic compounds in the reactor and the dynamics of changes in the activity of the reaction medium of sulfonation depending on the concentration of high-viscosity components. The proposed method for calculating the current and optimal activity of the HF catalyst at the alkylation stage allows one to accurately assess the effect of the concentration of heavy aromatic compounds on the catalyst activity and optimize the process mode to maintain its activity at an optimal level. The results of the optimization calculation of the SO3/alkylbenzenes ratio in alkylbenzenes sulfonation with different contents of light aromatic compounds in the feedstock are obtained.
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| ISSN: | 2500-1019 2413-1830 |