# US 2022/0033720 A1 · Temperature Control for Centrifugation of Steam Cracked Tar > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0033720 A1 - Document ID: US20220033720A1 - Status: Published application - Kind: A1 - Application number: 17/298,972 - Filed: 2019-12-11 - Published: 2022-02-03 - Earliest claimed: 2018-12-14 - Assignees: ExxonMobil Chemical Patents Inc. - Applicants: ExxonMobil Chemical Patents Inc. - Inventors: John S. Coleman; Kapil Kandel; Michael J. Clemmons; Teng Xu; Giovanni S. Contello - Web page: https://patentgrep.com/patent/US20220033720A1 ## CPC - C10G 31/10: with the aid of centrifugal force - C10G 55/04: including at least one thermal cracking step - C10G 31/06: by heating, cooling, or pressure treatment - C10G 69/06: including at least one step of thermal cracking in the absence of hydrogen - C10G 2300/201: Impurities - C10G 2300/206: Asphaltenes - C10G 2300/308: Gravity, density, e.g. API - C10G 2300/4006: Temperature - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The process of claim 1, wherein at least 90% by weight of the particles are transferred from the fluid-feed mixture to the higher density portion. ### Claim 3 (depends on 1) The process of claim 1, wherein at least 95% by weight of the particles are transferred from the fluid-feed mixture to the higher density portion. ### Claim 4 (depends on 1) The process of claim 1, wherein at least 98% by weight of the particles are transferred from the fluid-feed mixture to the higher density portion. ### Claim 5 (depends on 1) The process of claim 1, wherein the lower density portion comprises about 100 ppmw or less of the particles having a size of greater than 25 based on the weight of the lower density portion. ### Claim 6 (depends on 1) The process of claim 1, wherein the lower density portion is substantially free of particles of size greater than 25 μm. ### Claim 7 (depends on 1) The process of claim 1, wherein the fluid-feed mixture is centrifuged at a temperature of greater than 60° C. to about 200° C., and wherein the hydrocarbon feed comprises tar. ### Claim 8 (depends on 1) The process of claim 1, wherein the particles have a specific gravity from about 1.04 to about 1.5. ### Claim 9 (depends on 1) The process of claim 1, wherein the particles comprise polymeric asphaltene particles, polymeric coke particles, pyrolytic coke particles, inorganic fines, or any combination thereof; and wherein the hydrocarbon feed comprises steam cracker tar. ### Claim 10 (depends on 9) The process of claim 9, wherein the particles comprise polymeric coke particles, and wherein the polymeric coke particles have a specific gravity of about 1.04 to about 1.1. ### Claim 11 (depends on 1) The process of claim 1, further comprising hydroprocessing at least a portion of the lower density portion. ### Claim 12 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. ### Claim 13 (depends on 12) The process of claim 12, wherein the lower density portion comprises about 250 ppmw or less of particles having a size >25 μm, based on the weight of the lower density portion. ### Claim 14 (depends on 12) The process of claim 12, wherein the lower density portion comprises about 100 ppm or less of particles having a size >25 μm, based on the weight of the particles in the feed-fluid mixture. ### Claim 15 (depends on 12) The process of claim 12, further comprising hydroprocessing at least a portion of the lower density portion. ### Claim 16 (depends on 12) The process of claim 12, wherein the fluid comprises a solvent selected from the group consisting of benzene, ethylbenzene, trimethylbenzene, xylenes, toluene, naphthalenes, alkylnaphthalenes, tetralins, alkyltetralins, and any combination thereof. ### Claim 17 (depends on 12) The process of claim 12, wherein the fluid-feed mixture is centrifuged at a temperature of greater than 60° C. to about 200° C. ### Claim 18 (depends on 12) The process of claim 12, wherein the particles of the fluid-feed mixture have a specific gravity from about 1.04 to about 1.5. ### Claim 19 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. ### Claim 20 (depends on 19) The process of claim 19, wherein the fluid-feed mixture is centrifuged at a temperature of greater than 60° C. to about 200° C. ### Claim 21 (depends on 19) The process of claim 19, wherein the lower density portion comprises no more than 10 wt % of the particles in the fluid-feed mixture, based on the weight of the particles in the fluid-feed mixture. ### Claim 22 (depends on 19) The process of claim 19, wherein the lower density portion comprises no more than 5 wt % of the particles in the fluid-feed mixture, based on the weight of the particles in the fluid-feed mixture. ### Claim 23 (depends on 19) The process of claim 19, wherein the lower density portion comprises no more than 2 wt % of the particles in the fluid-feed mixture, based on the weight of the particles in the fluid-feed mixture. ### Claim 24 (depends on 19) The process of claim 19, wherein the lower density portion is substantially free of the particles of size greater than 25 μm. ### Claim 25 (depends on 19) The process of claim 19, wherein the lower density portion comprises about 250 ppmw or less of the particles having a size of greater than 25 μm, based on the weight of the lower density portion. ### Claim 26 (depends on 19) The process of claim 19, further comprising hydroprocessing at least a portion of the lower density portion.