Method for decoloration of triethylenetetramine (TETA)

摘要

A method of removing color from crude triethylenetetramine (TETA) is disclosed. In the preferred procedure, acid treated clay or acidic form zeolite are mixed with the TETA at elevated temperatures. After several hours exposure, the TETA is distilled to obtain a decolored product. The decoloration can be a continuous or batch process. The distillation is performed in the presence or absence of the catalyst.