Patent ID: 8529757
Filing Date: 2013-09-10
Classification: B01D,C07C,C10G

Abstract:
1. An apparatus for the continuous simulated countercurrent adsorptive separation of hydrocarbons comprising plural sieve chambers fluidly connected with plural bedlines A 1 through An+j, wherein n>2 and n+j is the total number of bedlines, which in turn are fluidly connected with a matrix of fluid communication conduits to distribute plural input streams, including desorbent, a primary flush input and a secondary flush input, and at least two multicomponent feeds differing in the concentration of paraxylene, to said plural bedlines, and plural output streams, including a primary flush output and a secondary flush output, an extract comprising a paraxylene-enriched product, and raffinate, from said plural sieve chambers, the improvement comprising: when bedline An contains extract, bedline An+9 contains a first multicomponent feed, bedline An+7 contains a second multicomponent feed, then said secondary flush input is contained in a bedline between bedlines An+2 and bedline An+7.