Product recovery process for adsorber regeneration

A process for regenerating an adsorber, comprising:

• A) providing an adsorber (A1) comprising an adsorbent comprising at least one compound containing oxygen or sulfur adsorbed thereon and a purified organic composition (OC1) comprising at least one olefin, at least one alkane and optionally at least one compound oxygen or sulfur;
• B) draining the adsorber (A1) to at least partially remove the purified organic composition (OC1) to result in the adsorber (A1) comprising a residual of the purified organic composition (OC1) and the adsorbent comprising the at least one compound containing oxygen or sulfur adsorbed thereon;
• C) regenerating the adsorber (A1) comprising the residual of the organic composition (OC1) and the adsorbent comprising the at least one compound containing oxygen or sulfur thereon by contacting with a gaseous stream (S2) to obtain an outflow comprising the gaseous stream (S2), the residual of the purified organic composition (OC1), and the at least one compound containing oxygen or sulfur;
• D) at least partially condensing the outflow by employing at least one condenser, a cooler, or both;
• E) collecting as a content in a device (D1) the at least partially condensed outflow comprising the gaseous stream (S2), the residual of the purified organic composition (OC1) and the at least one compound containing oxygen or sulfur;
• F) replacing the gaseous stream (S2) in the adsorber (A1) completely or at least partially by the content of the device (D1);
• and then
• G) feeding the adsorber (A1) with an organic composition (OC2) comprising at least one olefin, at least one alkane, and at least one compound containing oxygen or sulfur and adsorbing the at least one compound containing oxygen or sulfur in the organic composition (OC2) to obtain the adsorber (A1) of step A), wherein the organic composition (OC2) comprises at least 20 wt-% of the at least one olefin, at most 80 wt-% of the at least one alkane, and no more than 1 wt-% of dienes.