Distillation apparatus
US7922872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2007 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Jun 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A distillation apparatus of the present invention includes a distillation column group in which a plurality of distillation columns including a condenser and a reboiler is connected in the form of a cascade; a gas-feeding line which feeds gas from the distillation column to a latter distillation column; a gas line which introduces the gas from the distillation column to the condenser attached to the distillation column; a liquid-line which withdraws a condensed liquid from the condenser; a liquid-reflux line which introduces a part of the condensed liquid from the liquid-line to the distillation column; a liquid-return line which returns the remainder of the condensed liquid from the liquid-line to a former distillation column; a valve provided on the liquid-return line; and a bypass line which connects the liquid-return line and the gas line so as to flow an evaporated gas generated in the liquid-return line to the gas line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.