2020 REFINING PROCESSES HANDBOOK PROCESS CATEGORIES COMPANY INDEX DEASPHALTING Deasphalted oil Solvent Deasphalting Deasphalted oil recovery Application: A process to produce deasphalted oil (bright stock) from vacuum residues for further processing in downstream units to produce lubricating base oils or feedstock for catalytic cracking and hydrocracking. Description: Feedstock is cooled to extraction temperature and counter-currently treated with solvent in an extraction tower. Steam coils near the top of the extractor control the temperature gradient, providing reflux and maximum selectivity of separation. Deasphalted oil containing most of the solvent is withdrawn from the top. The major portion of the solvent is evaporated from the oil under pressure, and the remaining solvent is steam-stripped off the oil under vacuum. The asphalt from the bottom of the extraction tower is heated under pressure to recover the solvent, followed by steam-stripping for removal of solvent traces. Extraction tower STM Feed Asphalt recovery STM Feeds: Vacuum residues from crude oils. Products: Deasphalted oils with bright color, low Conradson carbon residue and negligible resins, asphalt and metals content for use as lubricating base oils or feedstock for catalytic cracking and hydrocracking. A byproduct is asphalt with a high softening point. Utilities: (per m3 of feed) Electricity 15 LP steam 380 Cooling water 7 Fuel energy 400 15 kWh 340 kg 6 m³ 11 kWh Installations: Numerous installations under thyssenkrupp license are in operation around the world. Solvent makeup Solvent accumulator Sewer Asphalt Solvent Website: www.thyssenkrupp-industrial-solutions.com Contacts: sandra.jensen@thyssenkrupp.com, dorothe.weimer@thyssenkrupp.com Licensor: thyssenkrupp. The former proprietor of this technology was ThyssenKrupp Uhde GmbH. Copyright © 2020 Gulf Energy Information. All rights reserved.http://www.hydrocarbonprocessing.com/ http://www.thyssenkrupp-industrial-solutions.com