Filtration media having recycled waste materials
US8343401B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2011 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Apr 25, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for forming a filtration media from waste media includes combining the waste media with a binder to form a dry mixture, adding a liquid composition to the dry mixture to form a slurry, and extruding the slurry to form a filtration media. The waste media may include fines or oversized media resulting from a prior media production process that have been subjected to a hydration process. The waste media may be ground and sized prior to combining it with the binder. The binder may include clay, cellulose materials, and combinations thereof. The liquid composition may include water and optionally one or more additional additives selected from the group consisting of permanganates, acids, bases, amines and combinations thereof. In one embodiment, the slurry is extruded into a honeycomb matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.