ピリジン塩基-水-塩類系の相互溶解度について

抄録

Mutual solubility of pyridine base-water-salt system was determined. Pyridine bases used were pyridine and 2-picoline, and salts tested were potassium and sodium carbonate, sodium and ammonium sulfate, and potassium and sodium chloride. It was thereby found that aliphatic primary amines and pyridine bases had following characteristics in common: (a) Conjugation curves drawn in molar fraction units became approximately linear within a certain limited concentration range; (b) dehydration of amines became easier with increasing number of methylene groups in the homologs; and (c) linear parts of the conjugation curves of amine homologs to one kind of a salt are approximately parallel. It was clarified that there is a definite order in the dehydrative ability of the salts and dehydrative effect of ions was found to be K⁺>Na⁺, and CO₃^2-≅SO₄^2->OH^->Cl^-. It was also found that anions had greater effect on dehydrative action than cations.