Temperature Control for Centrifugation of Steam Cracked Tar
AssigneeExxonMobil Chemical Patents Inc.
InventorsJohn S. Coleman, Kapil Kandel, Michael J. Clemmons, Teng Xu, Giovanni S. Contello
Life of this patent
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Abstract
Processes for preparing a low particulate liquid hydrocarbon product are provided and includes blending a tar stream containing particles with a fluid to produce a fluid-feed mixture containing tar, the particles, and the fluid, and centrifuging the fluid-feed mixture at a temperature of greater than 60° C. to produce a higher density portion and a lower density portion, where the lower density portion contains no more than 25 wt % of the particles in the fluid-feed mixture.
Claims26
A process for preparing a low particulate liquid hydrocarbon product comprising:
- blending a hydrocarbon feed comprising particles with a fluid to produce a fluid-feed mixture comprising tar, the particles, and the fluid;
- and
- centrifuging the fluid-feed mixture at a temperature of greater than 60° C. to produce a higher density portion and a lower density portion, wherein at least 75% by weight of the particles are transferred from the fluid-feed mixture to the higher density portion, based on the weight of the particles in the fluid-feed mixture.
A process for preparing a low particulate liquid hydrocarbon product comprising:
- blending a tar stream comprising particles with a fluid to produce a fluid-feed mixture comprising tar, the particles, and the fluid, wherein the fluid-feed mixture comprises greater than 500 ppmw of the particles having a size of greater than 25 μm, based on the weight of the fluid-feed mixture;
- and
- centrifuging the fluid-feed mixture at a temperature of greater than 60° C. to produce a higher density portion and a lower density portion,
- wherein:
- the lower density portion comprises ≤25% of the particles in the fluid-feed mixture, based on the weight of particles in the feed-fluid mixture, or
- the lower density portion comprises ≤500 ppmw of particles having a size of greater than 25 μm, based on the weight of the lower density portion.
A process for preparing a low particulate liquid hydrocarbon product comprising:
- blending an SCT comprising particles with a fluid to produce a fluid-feed mixture comprising tar, the particles, and the fluid, wherein the fluid-feed mixture comprises greater than 500 ppm of the particles having a size of greater than 25 μm, and wherein the particles have a specific gravity from about 1.04 to about 1.5;
- and
- centrifuging the fluid-feed mixture at a temperature of greater than 60° C. to produce a higher density portion and a lower density portion, wherein the lower density portion comprises 500 ppmw or less of the particles having a size of greater than 25 μm, based on the weight of the lower density portion.
Dependencies are inferred from the claim text.