CLXIX.—The critical solution temperature of the system methyl alcohol–cyclohexane as a means of detecting and estimating water in methyl alcohol

Jones, David Charles; Amstell, Simon

doi:10.1039/jr9300001316

Cited by 32 publications

(13 citation statements)

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“…Another use for C.S.T. is the quick analysis of binary mixtures (88, 88, SO, SI, 53), especially percentage of water (84, 38, SO, 31,48,53) or analysis of multiple mixtures (3,16,43).…”

mentioning

confidence: 99%

Solvent Selectivity for Hydrocarbons

Francis¹

1944

Ind. Eng. Chem.

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It was further purified by solution in 250 ec. of water and a small amount of ammonium hydroxide; dilute hydrochloric acid was added to slight acidity, and liquid bromine was again added. This solution yielded a white precipitate weighing 21 grams. This material contained 76% uronic acid (19% carbon dioxide), 25.9% pentosans, and 0.53% methoxyl. The rotation in 2% ammonium hydroxide was 233°. The data agree satisfactorily with similar values for pectic acid. The acid was further characterized as its calcium salt. Thus, at least half of the hot water extract in redwood bark is pectic acid, similar to that isolated from other woods.

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“…Another use for C.S.T. is the quick analysis of binary mixtures (88, 88, SO, SI, 53), especially percentage of water (84, 38, SO, 31,48,53) or analysis of multiple mixtures (3,16,43).…”

mentioning

confidence: 99%

Solvent Selectivity for Hydrocarbons

Francis¹

1944

Ind. Eng. Chem.

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“…Although the reported values of the upper consolute temperature range from 318 to 322 K, a relatively low value of 318.5 K from Ref. [27] has been selected because higher values from other sources may be caused by water impurity according to the studies [28,29]. The selected data and the smoothing equation are shown in Fig.…”

Section: Cyclohexane + Methanol Systemmentioning

confidence: 99%

Reference materials for phase equilibrium studies. 1. Liquid–liquid equilibria (IUPAC Technical Report)

2021

Chemistry International

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This article is the first of three projected IUPAC Technical Reports resulting from IUPAC Project 2011-037-2-100 (Reference Materials for Phase Equilibrium Studies). The goal of this project is to select reference systems with critically evaluated property values for the validation of instruments and techniques used in phase equilibrium studies of mixtures. This report proposes seven systems for liquid-liquid equilibrium studies, covering the four most common categories of binary mixtures: aqueous systems of moderate solubility, non-aqueous systems, systems with low solubility, and systems with ionic liquids. For each system, the available literature sources, accepted data, smoothing equations, and estimated uncertainties are given.

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“…The diagram for cyclohexane/methanol azeotrope compared with the measured liquid–liquid equilibrium (LLE) and vapor–liquid equilibrium (VLE) data …”

Section: Separation Feasibility and Design Of The Two‐column/decantermentioning

confidence: 99%

“…Hegely and Lang 39 optimized a batch heteroazeotropic distillation process consisting of multiple batches (separation of isopropanol and water The diagram for cyclohexane/methanol azeotrope compared with the measured liquid-liquid equilibrium (LLE) and vapor-liquid equilibrium (VLE) data. [50][51][52] with toluene as entrainer). In the earlier mentioned studies, the heteroazeotropes are composed by adding the third component, and their uniform feature of phase splitting is used to separate mutually soluble homoazeotropes into high-purity components.…”

Section: Introductionmentioning

confidence: 99%

Optimization of decanter temperature in separating partially miscible homoazeotrope to reduce cost and energy consumption

Wang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND There is a special type of azeotrope in the chemical industry. The components can form homoazeotrope under atmospheric pressure and azeotropic temperature but show partial miscibility when the temperature decreases. A two‐column/decanter process was presented to separate the mixture. However, the energy consumption and the total annual cost are high. RESULTS Based on the decanter temperature, the operating parameters of the conventional process and the modified process were optimized to achieve the minimum total annual cost (TAC). Through comparing the two processes, the minimum TAC of the latter one is 14.2% lower than that of the former one when the decanters of the two processes are at 10 °C. A control structure, which can efficiently control the modified process, was also explored and verified. CONCLUSION For the conventional process and the modified process, the influences of the decanter temperature on the compositions of the layered liquid phases, the total reboiler duty of the columns, and the minimum TAC demonstrated that the decanter temperature has important impacts on energy cost and economy of the two processes. Furthermore, the modified process using two cooling media in combination can further reduce the TAC. © 2019 Society of Chemical Industry

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CLXIX.—The critical solution temperature of the system methyl alcohol–cyclohexane as a means of detecting and estimating water in methyl alcohol

Cited by 32 publications

References 0 publications

Solvent Selectivity for Hydrocarbons

Solvent Selectivity for Hydrocarbons

Reference materials for phase equilibrium studies. 1. Liquid–liquid equilibria (IUPAC Technical Report)

Optimization of decanter temperature in separating partially miscible homoazeotrope to reduce cost and energy consumption

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