• Korean Chemical Engineering Research
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• v.59 no.4
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• pp.644-651
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• 2021

Alkyl amines are widely used in various industries. Nowadays these are also used in CO₂ capture technology because amines react with CO₂ and remove it from the flue gas. To make the amines more compatible towards this technology, physico chemical properties may be altered by mixing with other solvents. In the present report, we measured the refractive properties of pure diisopropylamine (DIPA) (1) + isomeric butanol (2) at 298.15 K to 308.15 K. The 𝚫n values were positive for DIPA + n-butanol or sec-butanol or isobutanol or tert-butanol mixtures. The measured data was correlated with Redlich-Kister equation. The excess molar volume data were predicted from refractive index data using Nakata and Sakurai model. The experimental data were also predicted by various correlations, and the prediction capability of these correlations was reported through standard deviation. Further, the deviation in refractive index (𝚫n) data was interpreted by the consideration of specific molecular interactions between DIPA and isomeric butanol.

• Applied Chemistry for Engineering
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• v.9 no.7
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• pp.968-973
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• 1998

The critical micelle concentrations($CMC^*$) of the mixed surfactant systems of cationic surfactant cetylpyridinium chloride(CPC) and nonionic surfactant Triton X-100(TX-100) in aqueous solutions of salts(KCl and $Na_2CO_3$) and isomeric butanols(tert-butanol, iso-butanol and n-butanol) were determined by UV spectroscopy method. The various thermodynamic values in aqueous solutions of salts and isomeric butanols were compared with the values in pure water, calculated by means of the equation derived from the pseudo-phase separation model. Thermodynamic parameters($X_1$, $\beta$, ${\gamma}i$, $ai^M$, $C_i$ and ${\Delta}H_{mix}$) were found to have great effects of salts and isomeric butanols on the mixed micellization of CPC/TX-100 mixtures, and also in good agreements with the nonideal mixed micelle model. They showed all negative deviations from the ideal mixed micellar behavior.

• Korean Journal of Environmental Agriculture
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• v.15 no.1
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• pp.37-45
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• 1996

Abstracts From the previous metabolic study of Pentachlorophenol(PCP), PCP was found to be exclusively transformed into ${\beta}-glucose$ conjugates of PCP in soybean and rice cell suspension cultures. In order to gather structural information of of the glucose conjugate, their aglycons and glycon have been analyzed by GC and GC/MS respectively, after thorough purification by chromatographic techniques. The glucose conjugates were effectively purified through a 1-butanol extraction followed by Silica gel TLC, Sephadex column chromatography and HPLC. Aglycons of the metabolites were identified as PCP, isomeric mixture of tetrachlorophenol, and tetrachlorocatechol and glycon were identified as glucose, suggesting that there are at least three kinds of glucose conjugates with different phenolic moieties. Under controlled conditions, the glucose conjugates were separated into three HPLC peaks which released respective aglycon upon a hydrolytic treatment. These results give valuable information on the structure of the glucose conjugates such that some PCP-driven chlorophenols, in addition to PCP, are also conjugated with glucose.