Patent FR-2907021-A1 (FR)
Title: Device for separating normal-paraffinic hydrocarbons/olefinic hydrocarbons from fraction comprising hydrocarbons by adsorption in simulated mobile bed, comprises column having adsorbent beds separated by distributor/extractor plates
Inventor: HOTIER GERARD
IPC: B01D15/18
Filed: 2006-10-16
Abstract: The device for separating normal-paraffinic hydrocarbons/olefinic hydrocarbons from a fraction comprising hydrocarbons by adsorption in simulated mobile bed, comprises a column having adsorbent beds (A i) separated by distributor/extractor plates (P i) for sequential feeding and extracting of two feeding fluids, a charge F, a desorbent D, two drawing fluids, a raffinate R and an extract E, a F-Net network of charge, D-Net network of adsorbent, a R-Net network of raffinate and E-Net network of extract, each of the networks are connected to the column by lines. The device for separating normal-paraffinic hydrocarbons/olefinic hydrocarbons from a fraction comprising hydrocarbons by adsorption in simulated mobile bed, comprises a column having adsorbent beds (A i) separated by distributor/extractor plates (P i) for sequential feeding and extracting of two feeding fluids, a charge F, a desorbent D, two drawing fluids, a raffinate R and an extract E, a F-Net network of charge, D-Net network of adsorbent, a R-Net network of raffinate and E-Net network of extract, each of the networks are connected to the column by lines comprising sectioning valves controlled in two-ways with aperture diameter greater than or equal to alpha value called network valves. The distributor/extractor plates are laid between the adsorbent beds. Each distributors/extractor plates of each of the areas are with single common network for feeding and withdrawing of networks. The plates (P i, P i + 1) of each section (S k) are connected between each other by a line of main external derivation (L k) connected with each of plates of the section by a nozzle comprising a sectional valve controlled in two-ways having plates (P i or P i + 1) called plate valve (V i or V i + 1). Each of the bypass lines comprises a control unit for limiting the circulating flow in main external derivation, which is either installed on the line of main external derivation or a bypass around the plate valve. The bypass of each section is linked to each of the networks via a single line of internal diameter higher or equal to a valve of a single network, respectively V-Fk, V-Dk, V-Rk, V-Ek with an opening diameter greater than or equal to alpha. Secondary external bypass lines (M k) connecting two adjacent sectors (S k - 1 and S k) through two connecting points. The first connecting point is laid on the nozzle connected to the lower plate (P i - 1) of the upper sector (S k - 1) between P i - 1 and the plate valves (V i - 1). The second connecting point is laid on the nozzle connected to top plate (P i) of the lower sector (S k) between P i and the plate valve (V i). Each external secondary bypass (M k) comprises a valve controlled in two-ways V-Mk of internal opening diameter of = 0.6 alpha. The line of derivation has a diameter less than or equal to the largest opening diameter of network valves linked to the main external derivation. The entire column is made by the superimposed adjacent sections except for the head plate. The column comprises a lower output line similar to a plate corresponding to lower adsorbent bed. The unit limiting the circulating flow comprises a controlled valve of opening diameter less than or equal to beta. Each of the secondary bypass lines comprises a control unit. A sequential feeding network RE-Net of a fluid of reflux RE comprises the extract, where the network is connected to each sector through a single internal diameter greater than or equal to alpha comprising to a single network valve (V-REk), which has an opening diameter greater than or equal to alpha. A sequential withdrawing network R2-Net of a second raffinate is connected to each sector through a single line of internal diameter greater than or equal to alpha comprising a single valve network (V-R2k), which has an opening diameter greater than or equal to alpha. An independent claim is included for a method for separating a product using the device.