| 摘要 |
<p>PURPOSE:To provide sufficient detergency, ease of handling, ease of preservation and low cost by bringing a soln. contg. choline into liquid-liquid contact with an org. solvent and separating the choline and the org. solvent after this liquid- liquid contact. CONSTITUTION:The soln. contg. the choline is brought into liquid-liquid contact with the org. solvent and the choline soln. and the org. solvent are separated after this liquid-liquid contact. The choline has the solvent regenerating power nearly equiv. to the solvent regenerating power of sodium hydroxide and can easily reduce the volume of the waste regenerating liquid by dry distillation or combustion. Since the choline can be easily synthesized by blowing an ethylene oxide into an aq. triethyl amine soln., the cost is much lower than the cost of tetraalkyl ammonium hydroxide such as tetramethyl ammonium hydroxide.</p> |
