Water purification system
US4711723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | May 27, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2313/2011
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An over-the-counter, free-standing, water purification system including a pressure vessel that encloses a reverse-osmosis separator. Tap water at a pressure of between approximately 20 and 100 psig is introduced into the pressure vessel and a portion of the water is forced through the reverse-osmosis separator, while the remaining water is discharged from the pressure vessel along with the pollutants that are too large to penetrate the membrane of the reverse-osmosis separator. The product water passes through the reverse-osmosis separator at a rate of between approximately 5 to 100 milliliters per minute and is then post-filtered at a slow rate through a large amount of activated carbon, between approximately 10 and 1,000 grams, contained within the housing for the purification system. The product water has a contact time of residence time with the activated carbon of between approximately 15 to 30 minutes, which ensures that any odor, taste, color organic waste or chlorine passing through the reverse-osmosis separator are adsorbed by the activated carbon. After passing through the activated carbon, the purified water is discharged from the pressure vessel into, e.g., a container …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.