2020 REFINING PROCESSES HANDBOOK PROCESS CATEGORIES COMPANY INDEX LUBRICANTS AND WAXES Raffinate stripper MP Refining Application: A process to produce lube oil raffinates of high-viscosity index from vacuum distillates and de-asphalted oil. Extraction tower Description: The feed and N-Methyl-2-Pyrrolidone (MP) enter the treating tower at controlled temperatures and flowrates required for optimum counter-current extraction of the oil. The raffinate mix leaves from the top of the extraction tower and flows through heat exchangers and a fired heater to the raffinate vacuum flash tower. Most of the MP is vaporized from the raffinate for recycle to the extraction tower. Raffinate from the flash tower flows to the raffinate stripper, where it is steam-stripped of MP. The MP-rich extract mix exits from the bottom of the treating tower, and then is heat exchanged and passed through a triple effect evaporation system for MP removal. The extract is stripped free of MP with steam in the extract stripper. MP is a highly selective solvent. A low solvent-to-oil ratio can be used with MP to achieve the desired yield of a specified quality product. Existing solvent refining units can be converted to MP to increase throughput and/or reduce energy consumption. In the case of a grassroot unit, MP offers significant savings in investment and operating costs over most other solvents. Feeds: Paraffinic or naphthenic lubricating oil distillates and de-asphalted oils. The solvent used is N-Methyl-2-Pyrrolidone (MP). Products: High-quality raffinates suitable (after dewaxing if the feedstock is paraffinic) for use in blending into the highest quality motor oils and industrial products. Utilities: (Typical, Middle East crude; units per m³ of feed): Electricity 15 kWh MP steam 5 kg LP steam 80 kg Cooling water 20 m³ Fuel energy 200 kWh Installations: Numerous installations under thyssenkrupp license are in operation around the world. Raffinate STM Extract flash tower Extract mix settler Extract stripper STM Extract STM Feed Sewer Feed deaerator Drying tower Licensor: thyssenkrupp. The former proprietor of this technology was ThyssenKrupp Uhde GmbH. Website: www.thyssenkrupp-industrial-solutions.com Contacts: sandra.jensen@thyssenkrupp.com, dorothe.weimer@thyssenkrupp.com Copyright © 2020 Gulf Energy Information. All rights reserved.http://www.hydrocarbonprocessing.com/ http://www.thyssenkrupp-industrial-solutions.com