Desulfurization method of heavy oil using supercritical extraction

• Main Authors: KIM CHEOL HYEON, SHIN UNG CHEOL
• Format: Patent
• Language: English; Korean
• Published: 08.10.2021
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The present invention relates to a method for desulfurizing heavy oil using supercritical extraction, and more specifically, to a method for desulfurizing heavy oil, wherein a hydrocarbon solvent is added to heavy oil containing a sulfur-containing compound to extract and separate the sulfur-containing compound from the heavy oil under supercritical conditions so that desulfurized heavy oil is obtained without the use of separate hydrogen and catalysts, the production ratio of by-products is lower than that of an existing process to improve economical efficiency and profitability, hydrogen sulfide is not generated during the process to be eco-friendly, and a process configuration is simple compared to previous technology to improve the efficiency of the process. 본 발명은 초임계 추출을 이용한 중질유의 탈황 방법에 관한 것으로서, 보다 상세하게는 황 함유 화합물을 포함하는 중질유에 탄화수소 용제를 첨가하여, 황 함유 화합물을 중질유로부터 초임계 조건에서 추출 및 분리함으로써, 별도의 수소 및 촉매를 사용하지 않고도 탈황된 중질유를 수득하면서 기존의 공정에 비해 부산물의 생산 비율이 낮아 경제성 및 수익성을 향상시킬 수 있고, 공정 중에 황화수소가 발생되지 않아 친환경적이며, 공정의 구성이 종전 기술에 비해 간단하여 공정의 효율성을 향상시킬 수 있는 중질유의 탈황 방법에 관한 것이다.