| 摘要 |
PROBLEM TO BE SOLVED: To provide an effective and economical method for producing pure triethylenediamine(TEDA) and its solution. SOLUTION: This method for producing pure triethylenediamine solution comprises evaporating triethylenediamine and introducing the gas state triethylenediamine into a liquid solvent. The gaseous triethylendiamine is obtained from the top of a column or its side discharging port. Further, the pure triethylenediamine solution is produced by following the above method and then crystallizing the triethylenediamine from the solution. The liquid solvent is selected from the group consisting of cyclic or non-cyclic hydrocarbons, chlorinated aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, ketones, aliphatic carboxylic acid esters, aliphatic nitriles and ethers. |
