# US 12,767,900 B2 · Synergistic paraffin inhibitors with high and low crystallization onset temperatures > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,767,900 B2 - Document ID: US12767900B2 - Status: Granted - Kind: B2 - Application number: 18/382,981 - Filed: 2023-10-23 - Published: 2025-04-24 - Granted: 2026-10-20 - Earliest claimed: 2023-10-23 - Assignees: Baker Hughes Oilfield Operations LLC - Applicants: Baker Hughes Oilfield Operations LLC - Inventors: Wojciech Jakubowski; Rostyslav Dolog; Radhika Suresh - Web page: https://patentgrep.com/patent/US12767900B2 ## CPC - C10G 29/22: containing oxygen as the only hetero atom - C10G 29/20: Organic compounds not containing metal atoms - C10G 73/04: with the use of filter aids - 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 In one aspect, a synergistic paraffin inhibitor includes a high-temperature intermediate and a low-temperature intermediate. The high-temperature intermediate has a high crystallization onset temperature, while the low-temperature intermediate has a low crystallization onset temperature that is within a range of about 6° C. and about 30° C. lower than the high crystallization onset temperature. In another aspect, the synergistic paraffin inhibitor is prepared by obtaining a high-temperature intermediate and a low-temperature intermediate. The high-temperature intermediate and the low-temperature intermediate are mixed to form the synergistic paraffin inhibitor, which may be introduced to a crude oil. ## Claims ### Claim 1 A synergistic paraffin inhibitor comprising: a high-temperature intermediate with a high crystallization onset temperature between about 2° C. and 14.1° C., and a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is within a range of between about 6° C. and about 30° C. lower than the high crystallization onset temperature. ### Claim 2 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high crystallization onset temperature is between about 2° C. and about 9.5° C. ### Claim 3 (depends on 2) The synergistic paraffin inhibitor of claim 2, wherein the high crystallization onset temperature is between about 2° C. and about 8.3° C. ### Claim 4 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate is selected from the group consisting of polyacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins. ### Claim 5 (depends on 4) The synergistic paraffin inhibitor of claim 4, wherein the high-temperature intermediate comprises at least one polyacrylate having an alkyl chain of a length between C17 and C22. ### Claim 6 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the low-temperature intermediate is selected from the group consisting of polyacrylates, polymethacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins. ### Claim 7 (depends on 6) The synergistic paraffin inhibitor of claim 6, wherein the low-temperature intermediate comprises at least one polyacrylate having an alkyl chain of a length between C12 to C16. ### Claim 8 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and hexadecyl acrylate, and wherein the low-temperature intermediate comprises a copolymer of behenyl methacrylate and stearyl methacrylate. ### Claim 9 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a polymer of stearyl methacrylate. ### Claim 10 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a polymer of behenyl acrylate and a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises a copolymer of behenyl methacrylate and stearyl methacrylate. ### Claim 11 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises a polymer of behenyl methacrylate. ### Claim 12 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises an olefin maleic imide polymer. ### Claim 13 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a phenolic resin polymer comprising an alkyl chain with a length between C20 and C28. ### Claim 14 (depends on 1) The synergistic paraffin inhibitor of claim 1, wherein the high-temperature intermediate and the low-temperature intermediate are present in a range of between 1:20 and 20:1 (high-temperature intermediate:low-temperature intermediate). ### Claim 15 A method of preparing a synergistic paraffin inhibitor, the method comprising the steps of: obtaining a high-temperature intermediate with a high crystallization onset temperature between about 2° C. and 14.1° C.; obtaining a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is between about 6° C. and about 30° C. lower than the high crystallization onset temperature; and mixing the high-temperature intermediate and the low-temperature intermediate. ### Claim 16 (depends on 15) The method of claim 15, further comprising the step of identifying the high-temperature intermediate as suitable to treat a specific oil selected from synthetic oils, crude oils, and heavy crude oils. ### Claim 17 (depends on 16) The method of claim 16, wherein the step of identifying the high-temperature intermediate as suitable to treat the specific oil further comprises the step of evaluating the paraffin and/or wax composition of the specific oil. ### Claim 18 A method of treating a crude oil with a synergistic paraffin inhibitor, the method comprising the steps of: preparing the synergistic paraffin inhibitor, further comprising the steps of: obtaining a high-temperature intermediate with a high crystallization onset temperature between about 2° C. and 14.1° C.; obtaining a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is within a range of between about 6° C. and about 30° C. lower than the high crystallization onset temperature; and mixing the high-temperature intermediate and the low-temperature intermediate; and introducing the synergistic paraffin inhibitor to the crude oil. ### Claim 19 (depends on 18) The method of claim 18, wherein the high-temperature intermediate is selected from the group consisting of polyacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins, and the low-temperature intermediate is selected from the group consisting of polyacrylates, polymethacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins. ### Claim 20 (depends on 18) The method of claim 18, wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a phenolic resin polymer comprising an alkyl chain with a length between C20 and C28.