From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 81569 10.52957/27821900_2023_01_136 Научные статьи Scientific articles Научные статьи Thermodynamics of butadiene-1,3 dissolution processes in aqueous-ammonia solutions Thermodynamics of butadiene-1,3 dissolution processes in aqueous-ammonia solutions Смирнова Елена Алексеевна Smirnova Elena Alekseevna

кандидат химических наук;

candidate of chemical sciences;

 Ярославский государственный технический университет Yaroslavl State Technical University 23 03 2023 23 03 2023 4 1 136 141 19 01 2023 21 03 2023 https://chemintech.ru/en/nauka/article/81569/view

The article deals with thermodynamics of butadiene-1,3 dissolution in aqueous-ammonia solutions of potassium nitrate at the temperature range of 20 80 0C. Based on the data obtained we found that the solubility of butadiene-1,3 in aqueous-ammonia solutions follows the Henry's law. The potassium nitrate has a desalinizing effect on the solubility of butadiene-1,3 which decreases with increasing temperature. The addition of ammonia to water and aqueous solutions of potassium nitrate increases the solubility of butadiene-1,3. We have determined the thermodynamic functions of the dissolution process of butadiene-1,3, and the thermodynamic characteristics of the hydrated hydrocarbon in aqueous-ammonia solutions of potassium nitrate. The increase of dissolution heat of butadiene-1,3 in aqueous ammonia solution of potassium nitrate confirms the assumption of hydrogen bonding between hydrogen atoms of ammonia molecule and p-electrons of butadiene-1,3. Comparison of the numerical values of thermodynamic functions of butadiene-1,3 and 2-methylpropene dissolution process showed that both enthalpy and entropy changes increase with increasing degree of unsaturation of the mole-cule.

The article deals with thermodynamics of butadiene-1,3 dissolution in aqueous-ammonia solutions of potassium nitrate at the temperature range of 20 80 0C. Based on the data obtained we found that the solubility of butadiene-1,3 in aqueous-ammonia solutions follows the Henry's law. The potassium nitrate has a desalinizing effect on the solubility of butadiene-1,3 which decreases with increasing temperature. The addition of ammonia to water and aqueous solutions of potassium nitrate increases the solubility of butadiene-1,3. We have determined the thermodynamic functions of the dissolution process of butadiene-1,3, and the thermodynamic characteristics of the hydrated hydrocarbon in aqueous-ammonia solutions of potassium nitrate. The increase of dissolution heat of butadiene-1,3 in aqueous ammonia solution of potassium nitrate confirms the assumption of hydrogen bonding between hydrogen atoms of ammonia molecule and p-electrons of butadiene-1,3. Comparison of the numerical values of thermodynamic functions of butadiene-1,3 and 2-methylpropene dissolution process showed that both enthalpy and entropy changes increase with increasing degree of unsaturation of the mole-cule.

 thermodynamic characteristics butadiene-1 3 solubility aqueous-ammonia solutions potassium nitrate desalting Henry's coefficients

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