Isopropyl alcohol scrubbing system
US6306197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/1425
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and method for treating process gas streams containing isopropyl alcohol (IPA) to reduce the concentration of IPA therein. The invented system includes a scrubber unit that receives a process stream containing a concentration of IPA and reduces the concentration of IPA therein to below a determined threshold. The scrubber includes a reverse osmosis assembly that significantly reduces water consumption for the scrubbing process as compared to conventional once-through systems. The system may be operated at an elevated pH to prevent biofouling from inhibiting the operation of the reverse osmosis assembly. The system may contain a softening step on the make up water system to prevent scaling in the reverse osmosis system and a softening step on a sidestream of the scrubber water recirculation loop to reduce scrubber tower salting/scaling and to control the pH of the scrubbing liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.