Separator for producing aromatic carboxylic acids
US7470348B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 29, 2003 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Oct 30, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/28
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A separation system has a distillation column, an overhead vapor supply pipe connected to the top of the distillation column, first and second branch pipes branching from the overhead vapor supply pipe and a superheater connected to the first branch pipe. A separator downstream of the superheater has a separation membrane for separating overhead vapor from the top of the distillation column into permeable vapor and nonpermeable vapor by allowing only a selected portion of the overhead vapor to permeate the separation membrane. A reflux unit has a condenser connected to the second branch pipe for cooling a portion of the overhead vapor into a liquid and a gas-liquid separator for separating gas from the liquid produced by cooling and returning the separated liquid into the top of the distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.