Method for concentrating a slurry containing a solid particulate component
AssigneeChevron Research Company
InventorJames Melvin Davidson
Life of this patent
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Abstract
An improved method for the concentration of a slurry containing a solid particulate component is described. In the method, the slurry is contacted with a rotatable filtration assembly and some liquid is withdrawn from the slurry. When the rotational velocity of the unit is sufficient to develop a substantial centrifugal force at the periphery of the assembly, the process is continuous. The method is especially useful for the concentration of a p-xylene slurry.
Claims20
A process for increasing the concentration of a slurry comprising a particulate solid in a carrier liquid, which comprises removing a portion of said liquid from the slurry by:
- (1) introducing the slurry into a filtration zone containing a rotating unit, said unit containing a filter assembly adapted to pass said liquid as a filtrate while screening out said solid;
- (2) collecting said filtrate in a chamber in said assembly by maintaining a pressure differential between said slurry in said zone and said filtrate in said chamber;
- (3) withdrawing the filtrate from said chamber;
- and
- (4) withdrawing the resulting concentrated slurry from said zone;
- wherein said solid had a sensity greater than that of said carrier liquid, and wherein said unit is rotated at a velocity sufficient to generate a centrifugal force in the range from about 10 to 100 gravitational units and wherein substantially only centrifugal force is used to displace solids from said filter assembly.
A method for increasing the concentration of a slurry comprising solid p-xylene in a carrier liquid, which comprises removing a portion of said liquid from the slurry by:
- (1) introducing the slurry into a filtration zone containing a rotating unit, said unit containing a filter assembly adapted to pass said liquid as a filtrate while screening out said solid p-xylene;
- (2) collecting said filtrate in a chamber in said assembly by maintaining a pressure differential between said slurry in said zone and said filtrate in said chamber;
- (3) withdrawing the filtrate from said chamber;
- and
- (4) withdrawing the resulting concentrated slurry from said zone;
- wherein said unit is rotated at a velocity sufficient to generate a centrifugal force in the range from about 10 to 100 gravitational units and wherein substantially only centrifugal force is used to displace solids from said filter assembly.
Dependencies are inferred from the claim text.