Vapor recompression reboiling process
US4525244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1982 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Nov 24, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G7/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to distillation in pressurized columns and provides a process for reboiling such columns. The column 1 working at a pressure of 11 bar is fed with a mixture of hydrocarbons preheated in exchangers 2a and 2b to about 130.degree. C. A part of the bottom is withdrawn, then expanded by means of an expansion valve 5 to 2.5 bar in an expansion balloon flask 6 where the phases are separated. The vapor phase is compressed in a compressor 7 to the pressure of the column and reinjected at the bottom of the column, whereas the liquid phase is removed. With the process, energy can be saved in pressurized distillation columns, for example in petrol stabilization columns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.