Adsorption and filtration mat for liquids
US4395332A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 28, 1981 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Apr 28, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are filter mats composed of a wet laid, porous, non-woven matrix having randomly arranged, irregularly intersecting and overlapping cellulose fibers intermixed as a cobeat (i.e. beaten together) with micro-bits of an expanded, thermoplastic styrene-polymer or lower polyolefin or of a flexible foamed polyurethane, and which mix also can include any one or more additional such micro-bits and of fiber-forming polyethylene terephthalate polyester fibers, finely divided activated carbon, diatomaceous earth, and colloidal alumina monohydrate. These mats are effective, for example, to remove insoluble particles and/or soluble substances present in liquid, presently primarily aqueous, media particularly in minute amounts, such as undesirable substances in industrial plant waste waters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.