Chromatographic simulated mobile bed separation process with dead volume correction using length reduction
US5578216A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D15/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a simulated mobile bed separation process, perturbations are corrected in the compositions of an extract (EA) or raffinate (RB) due to the dead volume introduced by at least one recycling pump (P) or compressor for a liquid, supercritical or gaseous mixture in a closed circuit of column sections. The volume of the section immediately upstream of the dead volume is reduced by an appropriate value when said dead volume is located downstream of this section and upstream of the extraction streams of said section, or the volume of the section immediately downstream of the dead volume is reduced by an appropriate value when the dead volume is located downstream of the injection streams into said section and upstream of this section. The invention is applicable to the separation of isomers of aromatic hydrocarbons containing 8 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.