Modeling the multistage process of the linear alkylbenzene sulfonic acid manufacturing

Research output: Contribution to journalArticle

Abstract

Linear alkylbenzene sulfonic acid (ASA) is used to produce industrial and domestic synthetic detergents and is obtained via a multistage technology. Unsteady mathematical models were developed for all technological stages. With use of the developed models we studied how the modes in the dehydrogenation reactor influence the product quality and yield. It was found that increase in the hydrogen/feedstock ratio in the dehydrogenation reactor from 6 to 8 mol/mol decreases the outlet dienes concentration from 0.57 to 0.46%wt. This reduces the amount of heavy aromatic compounds (HAR) formed in the alkylation reactor, as well as the optimal flow rate of alkylation HF catalyst to regeneration from 4.5 to 4.1 m3/h. The decrease of the hydrogen/feedstock ratio in the dehydrogenation reactor from 6.5 to 6 mol/mol intensifies the highly viscous component accumulation in the sulfonation reactor, reducing the period between the reactor washings from 13 to 10 days.

Original languageEnglish
Pages (from-to)510-519
Number of pages10
JournalChemical Engineering Research and Design
Volume147
DOIs
Publication statusPublished - 1 Jul 2019

Fingerprint

Sulfonic Acids
Dehydrogenation
Alkylation
Feedstocks
Acids
Hydrogen
Sulfonation
Aromatic compounds
Detergents
Washing
Flow rate
Mathematical models
Catalysts

Keywords

  • Alkylation
  • Alkylbenzene sulfonic acid
  • Dehydrogenation
  • Mathematical modeling
  • Sulfonation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Modeling the multistage process of the linear alkylbenzene sulfonic acid manufacturing",
abstract = "Linear alkylbenzene sulfonic acid (ASA) is used to produce industrial and domestic synthetic detergents and is obtained via a multistage technology. Unsteady mathematical models were developed for all technological stages. With use of the developed models we studied how the modes in the dehydrogenation reactor influence the product quality and yield. It was found that increase in the hydrogen/feedstock ratio in the dehydrogenation reactor from 6 to 8 mol/mol decreases the outlet dienes concentration from 0.57 to 0.46{\%}wt. This reduces the amount of heavy aromatic compounds (HAR) formed in the alkylation reactor, as well as the optimal flow rate of alkylation HF catalyst to regeneration from 4.5 to 4.1 m3/h. The decrease of the hydrogen/feedstock ratio in the dehydrogenation reactor from 6.5 to 6 mol/mol intensifies the highly viscous component accumulation in the sulfonation reactor, reducing the period between the reactor washings from 13 to 10 days.",
keywords = "Alkylation, Alkylbenzene sulfonic acid, Dehydrogenation, Mathematical modeling, Sulfonation",
author = "Irena Dolganova and Emilia Ivanchina and Igor Dolganov and Elena Ivashkina and Anastasia Solopova",
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AU - Dolganova, Irena

AU - Ivanchina, Emilia

AU - Dolganov, Igor

AU - Ivashkina, Elena

AU - Solopova, Anastasia

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Linear alkylbenzene sulfonic acid (ASA) is used to produce industrial and domestic synthetic detergents and is obtained via a multistage technology. Unsteady mathematical models were developed for all technological stages. With use of the developed models we studied how the modes in the dehydrogenation reactor influence the product quality and yield. It was found that increase in the hydrogen/feedstock ratio in the dehydrogenation reactor from 6 to 8 mol/mol decreases the outlet dienes concentration from 0.57 to 0.46%wt. This reduces the amount of heavy aromatic compounds (HAR) formed in the alkylation reactor, as well as the optimal flow rate of alkylation HF catalyst to regeneration from 4.5 to 4.1 m3/h. The decrease of the hydrogen/feedstock ratio in the dehydrogenation reactor from 6.5 to 6 mol/mol intensifies the highly viscous component accumulation in the sulfonation reactor, reducing the period between the reactor washings from 13 to 10 days.

AB - Linear alkylbenzene sulfonic acid (ASA) is used to produce industrial and domestic synthetic detergents and is obtained via a multistage technology. Unsteady mathematical models were developed for all technological stages. With use of the developed models we studied how the modes in the dehydrogenation reactor influence the product quality and yield. It was found that increase in the hydrogen/feedstock ratio in the dehydrogenation reactor from 6 to 8 mol/mol decreases the outlet dienes concentration from 0.57 to 0.46%wt. This reduces the amount of heavy aromatic compounds (HAR) formed in the alkylation reactor, as well as the optimal flow rate of alkylation HF catalyst to regeneration from 4.5 to 4.1 m3/h. The decrease of the hydrogen/feedstock ratio in the dehydrogenation reactor from 6.5 to 6 mol/mol intensifies the highly viscous component accumulation in the sulfonation reactor, reducing the period between the reactor washings from 13 to 10 days.

KW - Alkylation

KW - Alkylbenzene sulfonic acid

KW - Dehydrogenation

KW - Mathematical modeling

KW - Sulfonation

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JO - Chemical Engineering Research and Design

JF - Chemical Engineering Research and Design

SN - 0263-8762

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