Solubility of isobutene in sulfuric acid-tert-butyl alcohol-water mixtures

Friedrich, Axel; Warnecke, Hans‐Joachim; Langemann, Horst

doi:10.1021/i200013a036

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…Moreover, at higher acid concentrations (>50 wt %), even salting-in will occur. This effect was recognized by several authors (Friedrich et al (1981), Sanders (1985)). Rudakov et al (1989) proposed a correlation for estimating the solubility of gaseous components in aqueous sulfuric acid solutions of 0-100 wt %.…”

Section: Physicochemical Parametersmentioning

confidence: 67%

“…At low acid concentrations a common salting-out behavior is found for most substances in aqueous sulfuric acid solutions. At higher acid concentrations (from 30 wt %) the Setchenow equation does not hold any longer and salting-out is overestimated by a Setchenow equa-tion (Friedrich et al (1981)). Moreover, at higher acid concentrations (>50 wt %), even salting-in will occur.…”

Section: Physicochemical Parametersmentioning

confidence: 98%

“…Acid strength was determined accurately using a standard NaOH titration method with a Mettler DL25 titrator. For the experiments freshly prepared (unloaded) acid solutions were used, since the presence of butanol will influence both the solution acidity as well as the butene solubility (Friedrich et al (1981(Friedrich et al ( , 1984). trans-2-Butene (quality 1.5) and isobutene (quality 2.3) were purchased from Praxair.…”

Section: Experimental Workmentioning

confidence: 99%

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On the Absorption of Isobutene and trans-2-Butene in Sulfuric Acid Solutions

Brilman

Swaaij

Versteeg³

1997

Ind. Eng. Chem. Res.

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In reactions in which alkenes react in the presence of homogeneous Brønstedt acid catalysts, the protonation step is rate determining. Existing reaction rate correlations for protonation of butenes in sulfuric acid solutions are not consistent and limited to sulfuric acid concentrations below 80 wt %. The absorption of isobutene and trans-2-butene in sulfuric acid solutions was studied in the range of 30-98 wt %. Reevaluation of literature data, completed with new data from this study, revealed a set of kinetic rate data which coincide satisfactorily. Experiments and modeling of the absorption experiments showed a strong dependence of the reaction rate on local mixture composition through the activity coefficient of the protonating agent. This strong dependence prevents the occurrence of a diffusion-limited absorption regime. Application of the usually used criteria for operating in the kinetic regime can lead to erroneous results.

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Section: Physicochemical Parametersmentioning

confidence: 67%

Section: Physicochemical Parametersmentioning

confidence: 98%

Section: Experimental Workmentioning

confidence: 99%

See 1 more Smart Citation

On the Absorption of Isobutene and trans-2-Butene in Sulfuric Acid Solutions

Brilman

Swaaij

Versteeg³

1997

Ind. Eng. Chem. Res.

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show abstract

“…At low acid concentrations a common salting-out behavior is found for most substances in aqueous sulfuric acid solutions. At higher acid concentrations (from 30 wt%) the Setchenow equation does not hold any longer and salting-out is overestimated by a Setchenow equation (Friedrich et al, 1981).…”

Section: Solubilitymentioning

confidence: 96%

“…Acid strength was determined accurately using a standard NaOH titration method with a Mettler DL25 Titrator. For the experiments freshly prepared (unloaded) acid solutions were used, since the presence of butanol will influence both the solution acidity as well as the butene solubility (Friedrich, 1981(Friedrich, ,1984. Trans-2-butene (quality 1.5) and isobutene (quality 2.3) were purchased from Praxair.…”

Section: Chemicalsmentioning

confidence: 99%