Method of dye removal for the textile industry
US6093325A · kind A · utility
13Cited by
9References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1997 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Aug 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention comprises a method of processing a waste stream containing dyes, such as a dye bath used in the textile industry. The invention comprises using an inorganic-based polymer, such as polyphosphazene, to separate dyes and/or other chemicals from the waste stream. Membranes comprising polyphosphazene have the chemical and thermal stability to survive the harsh, high temperature environment of dye waste streams, and have been shown to completely separate dyes from the waste stream. Several polyphosplhazene membranes having a variety of organic substituent have been shown effective in removing color from waste streams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.