Process and device for simulated moving bed separation with a reduced number of valves
US7582206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2007 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Dec 15, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A simulated moving bed (SMB) separation device comprising a column, beds Ai of adsorbent separated by plates Pi with a single distribution and extraction network for fluids, in particular feed F, desorbant D, raffinate R and extract B, and a plurality of two-way valves for distribution of said fluids, said valves being limited in number compared with the prior art. The column is divided into a plurality of sectors Sk with 2 or 3 superimposed plates, each sector Sk comprising an external bypass line Lk connected to each plate Pi of Sk via a connector comprising a plate valve Vi. Each line Lk comprises a controlled means for limiting its internal flow, and is connected to each of the fluid networks F, D, R, E via a single line comprising a single controlled two-way isolation valve to supply for sequential supply or withdrawal of the corresponding fluid F, D, R or E towards or from the sector Sk under consideration. The SMB device may be used for the separation of para-xylene or meta-xylene from an aromatic C8 cut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.