| Patent Number |
Title Of Patent |
Date Issued |
| 7345173 |
Work-up of the mother liquor obtained in the preparation of high-purity triethylenediamine |
March 18, 2008 |
| In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted with an extractant w |
| 7151177 |
Process for the preparation of highly pure triethylene diamine |
December 19, 2006 |
| Highly pure triethylenediamine is obtained by a process in which triethylenediamine is freed from high boilers and then the triethylenediamine is vaporized from the mixture thus obtained and is passed into a liquid solvent. The process makes it possible in particular to obtain highly |
| 6552194 |
Process for the preparation of pure triethylenediamine (TEDA) |
April 22, 2003 |
| The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250.degree. C., passing the vapor-form TEDA i |
