Process for a dual extract flush
AssigneeUop LLC
InventorsGregory A. Ernst, Jason L. Noe, Anton N. Mlinar
Life of this patent
Estimating the term…
Abstract
The present invention relates to dual extract flush for feeds for xylene extraction processes. More specifically, the present invention relates to dual extract flush for feeds for simulated moving bed extraction processes. It decouples line flush in and line flush out, providing a means for optimizing each flush independently. This scheme will allow for minimizing each bedline and flushing each according to its own bedline volume, which will minimize any additional non-ideal compositions added to the chambers or downstream fractionation.
Claims20
A process for a dual extract flush, comprising:
- passing a feed and desorbent into a unit wherein the unit comprises a desorption zone, a purification zone, and an adsorption zone wherein the desorption zone is located between the desorbent and extract, the purification zone is located between the extract and feed, and the adsorption zone is located between the feed and raffinate;
- removing an extract from the unit and splitting a portion of the extract stream into a first flush and a second flush;
- and
- passing the first flush and the second flush back to the unit.
A process for a dual extract flush, comprising:
- passing a feed and a desorbent to a unit comprising a plurality of beds wherein the unit comprises a desorption zone, a purification zone, and an adsorption zone wherein the desorption zone is located between the desorbent and extract, the purification zone is located between the extract and feed, and the adsorption zone is located between the feed and raffinate;
- removing an extract from the unit;
- splitting the extract stream into a first flush and a second flush;
- and
- passing the first flush and the second flush back to the unit wherein the first flush may comprise 70% of the flush and the second flush may comprise 30% of the flush.
Dependencies are inferred from the claim text.