Abstract:

To solve the problem of high oxygen content of unloading PDEB and xylene mixture from absorption tower when the aromatics combination plant shuts down, the industrial test which PDEB/C8A mixture was blended at a higher proportion into CCR feed for pre-hydrogenation was conducted The hydrodeoxygenation reaction removes completely the oxides in PDEB at the reaction conditions of 2.5 MPa, 304 ℃, and space velocity of 5.4 h-1. Xylene is recovered efficiently and avoids C8A is sold as heavy aromatics product. The profit is 66.5×104 Yuan RMB.

Key words: CCR, PX, PDEB, oxide, hydrogenation