Method for decoloration of triethylenetetramine (TETA)
US4737243A · kind A · utility
5Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.