Design of a Process for Production of Isopropyl Alcohol by Hydration of Propylene in a Catalytic Distillation Column

Xu, Yan; Chuang, Karl T.; Sanger, Alan R.

doi:10.1205/026387602760312908

Cited by 30 publications

(15 citation statements)

References 20 publications

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“…Isopropanol (IPA) as an important chemical has many applications in production of pharmaceuticals, cosmetics, plastics, fragrances, and coatings . Generally, IPA is mainly produced by the propylene hydration method in industry, from which an aqueous mixture of IPA is obtained. Because IPA and water can generate a minimum azeotrope with 87.8 wt % IPA at the azeotropic temperature of 353.45 K under 101.3 kPa, , general distillation is unavailable to purify IPA.…”

Section: Introductionmentioning

confidence: 99%

Explorations of Liquid–Liquid Phase Equilibrium for the Mixture (Isopropanol + Water) with Pyridinium-Based Ionic Liquids

et al. 2021

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Three pyridinium-based ionic liquids (ILs) were adopted to extract isopropanol (IPA) from its aqueous mixture for investigating the potential of these ILs in the separation of a (water + IPA) azeotropic mixture. The liquid–liquid equilibrium values for the mixtures (water + IPA + ILs) was determined at 298.15 K. The selectivity and distribution coefficient were computed, which indicates that the IL n-hexylpyridinium bis(trifluoromethyl sulfonyl)imide displays a better extraction effect to separate the mixture of IPA and water. Besides, the NRTL model was applied to regress the determined tie-line values, and the coherence of the optimized binary parameters was examined using the Gibbs energy surfaces analysis.

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Section: Introductionmentioning

confidence: 99%

Explorations of Liquid–Liquid Phase Equilibrium for the Mixture (Isopropanol + Water) with Pyridinium-Based Ionic Liquids

et al. 2021

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“…The changes and connections of various parameters in the distillation column are based on two criteria: material balance and energy balance. The main disturbance factors of the rectification tower temperature are: the amount and composition of the feed, the amount and composition of the top and bottom sections; the enthalpy and temperature of the feed, the heat load of the reboiler and the condenser, the reflux ratio, and the ambient temperature etc [10].…”

Section: Distillation Tower and Its Temperature Control Characteristicsmentioning

confidence: 99%

“…When the purity of the top product is very high, the temperature change in the top section of the tower is very small, so when the top temperature has a noticeable change, the fluctuation of the distillate composition has already exceeded the allowable range, so the top temperature cannot be used to control the distillate Composition, the temperature sensing element can be placed on the sensitive board to detect the interference of the distillation operation earlier [11] . Therefore, the neuron input layer variable in the neural network can be the temperature of the sensitive plate of the distillation tower, and the output variable can be the reboiler heating steam temperature control valve, so as to control the temperature of the sensitive plate [2] .…”

Section: Distillation Tower and Its Temperature Control Characteristicsmentioning

confidence: 99%

Review of Neural Network Algorithm and its Application in Temperature Control of Distillation Tower

Zhao

2021

JERR

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Distillation process is a complex process of conduction, mass transfer and heat conduction, which is mainly manifested as follows: The mechanism is complex and changeable with uncertainty; the process is multivariate and strong coupling; the system is nonlinear, hysteresis and time-varying. Therefore, traditional control methods are difficult to accurately control, but neural networks can greatly improve this problem. This article introduces the basic concepts of distillation tower temperature control, comprehensively introduces the application of various neural network algorithms in distillation tower temperature control, and compares their advantages and disadvantages and their effect. At present, there are many researches on neural network control of distillation tower temperature. The methods are different and each has its own merits. This article has carried out a systematic review to provide reference for the development of related industries.

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“…Propylene is a mainstay in the C3 industry, which can be used to prepare basic organic chemicals through a variety of reaction pathways, such as polypropylene (PP) [1], propylene oxide (PO) [2], acrylic acid (AA) [3], acetone [4], acrylonitrile [5], isopropanol [6], and butanol [7] (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Wang

et al. 2022

Rare Met.

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CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is an attractive strategy to offset the demand gap of propylene due to its potentiality of reducing CO 2 emissions, especially under the demands of peaking CO 2 emissions and carbon neutrality. The introduction of CO 2 as a soft oxidant into the reaction not only averts the over-oxidation of products, but also maintains the high oxidation state of the redox-active sites. Furthermore, the presence of CO 2 increases the conversion of propane by coupling the dehydrogenation of propane (DHP) with the reverse water gas reaction (RWGS) and inhibits the coking formation to prolong the lifetime of catalysts via the reverse Boudouard reaction. An effective catalyst should selectively activate the C-H bond but suppress the C-C cleavage. However, to prepare such a catalyst remains challenging. Chromium-based catalysts are always applied in industrial application of DHP; however, their toxic properties are harmful to the environment. In this aspect, exploring environment-friendly and sustainable catalytic systems with Cr-free is an important issue. In this review, we outline the development of the CO 2 -ODHP especially in the last ten years, including the structural information, catalytic performances, and mechanisms of chromium-free metal-based catalyst systems, and the role of CO 2 in the reaction. We also present perspectives for future progress in the CO 2 -ODHP.

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Design of a Process for Production of Isopropyl Alcohol by Hydration of Propylene in a Catalytic Distillation Column

Cited by 30 publications

References 20 publications

Explorations of Liquid–Liquid Phase Equilibrium for the Mixture (Isopropanol + Water) with Pyridinium-Based Ionic Liquids

Explorations of Liquid–Liquid Phase Equilibrium for the Mixture (Isopropanol + Water) with Pyridinium-Based Ionic Liquids

Review of Neural Network Algorithm and its Application in Temperature Control of Distillation Tower

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

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