초록 ▼

The present invention provides methods and means for separating slurry liquid from catalyst in a three-phase slurry process. The embodiments of the invention are characterized by conducting the three-phase process under conditions to provide an upper region in the slurry that contains a catalyst con

The present invention provides methods and means for separating slurry liquid from catalyst in a three-phase slurry process. The embodiments of the invention are characterized by conducting the three-phase process under conditions to provide an upper region in the slurry that contains a catalyst concentration of about 20 wt % or less and a lower region with a catalyst concentration higher than about 20 wt %. A portion of the slurry in this upper region is degassed and passed to liquid-solid separation devices for recovery of liquid product.

대표청구항 ▼

1. A method for separating slurry liquid from catalyst in a three-phase slurry process, the method comprising: operating the slurry process under conditions sufficient to provide an upper region in the slurry bed where the slurry solids concentration is lower than about 20 wt % and a lower region in

1. A method for separating slurry liquid from catalyst in a three-phase slurry process, the method comprising: operating the slurry process under conditions sufficient to provide an upper region in the slurry bed where the slurry solids concentration is lower than about 20 wt % and a lower region in the bed where the solids concentration in the slurry is higher than about 20 wt % of catalyst;degassing a portion of the slurry in the upper region of the slurry bed;introducing the degassed slurry into a separation device to provide a liquid stream comprising substantially slurry liquid and a stream comprising catalyst particles; andreturning the stream comprising catalyst particles to the slurry bed. 2. The method of claim 1 wherein the three-phase slurry process is operated under slumped bed conditions. 3. The method of claim 1 wherein the three-phase slurry process is operated in a reactor having one or more slurry circulating downcomers under conditions to form a slurry bed that has a height greater than the height of the downcomers thereby providing an upper region in the slurry bed where the slurry contains about 20 wt % or less of catalyst. 4. The method of claim 2 or 3 wherein the slurry is degassed in a downcomer having a top end located in the upper region of the slurry bed and a main section extending to a lower region of the of the slurry bed. 5. The method of claim 4 wherein degassed slurry is withdrawn from the top end of the downcomer for introduction into a separation device. 6. The method of claim 4 wherein the degassed slurry is withdrawn from the main section of the downcomer for introduction into a separation device.