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The Effect of Dissolved Gases as Impurities on Crystallization
Author(s) -
Huang Jiting,
Yin Qiuxiang,
Ulrich Joachim
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500674
Subject(s) - impurity , crystallization , solvent , chemistry , thermodynamics , materials science , chemical engineering , organic chemistry , engineering , physics
Gases dissolved in solvents are usually low in amount but introduce many impurities to certain systems, thus creating disadvantages or advantages which have so far been seldom reported. Evidence of the effects of dissolved gases as impurities on crystallization is provided here. Four types of gases were used. By bubbling these gases into a solvent, gas‐saturated solutions were prepared, whereas the degassed solvent was used as a comparison. The results show that different types of gases (including the degassed solvent) do change the thermodynamic and kinetic aspects to a different degree. The pH values of the epsomite solutions that were saturated with different types of gases turned out to be different compared to the untreated solutions, indicating that the gas‐liquid‐solid equilibrium varied.