Process and device for simulated moving bed separation with a reduced number of valves and lines
US7582208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2008 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Mar 7, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns a simulated moving bed adsorption separation device comprising a limited number of valves. According to the invention, the device comprises a column with a plurality of sectors Sk with 2 superimposed plates Pi with a single distribution network, each sector Sk comprising an external principal bypass line Lk connected to each plate Pi of Sk via a plate valve Vi. Each line Lk comprises a flow limitation means and is connected to each of the fluid networks via a single valve.Further, the connectors of lines Lk onto the column are offset by at most 20° inside Sk to limit the volume of lines Lk, and are offset by a mean angle in the range 70° to 110° between two neighbouring sectors Sk and Sk+1 so as not to weaken the column mechanically. The plates preferably comprise panels DMEi,j with parallel segments the direction of which varies from plate to plate or per group of 2 plates.The invention also concerns a separation process using said device, in particular to separate para-xylene or meta-xylene from an aromatic C8 cut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.