Patent ID: 7767870
Filing Date: 2010-08-03
Classification: B01D,B01J,C07C,C10G

Abstract:
1. A method for separating solids from a gas-solids flow comprising: flowing a gas-solids flow in a riser, the top of the riser being joined to a plurality of termination devices at a solids loading of at least 1.0 lb/ft passing the gas-solids flow through the plurality of termination devices into one or more separation devices, the radius of curvature of each termination device being from about 1.0 to 5 times greater than the diameter of the termination device; changing the direction of the gas-solids flow by at least 90° by flowing the gas-solids flow through the plurality of termination devices wherein the termination devices comprise cap terminators having vent gaps; allowing vapors from the gas-solids flow to escape through a vent gap placed between the riser termination device and the first separation device or vent placed between the first and second separation devices; and separating the gas-solids flow into a lower density flow and a higher density flow in the one or more separation devices; wherein the plurality of termination devices closely couple the riser to the separation devices and are substantially sealed, and the combined cross-sectional area of the termination devices is at least 100% of the cross-sectional area of the riser but 350% or less of the cross-sectional area of the riser.