Extraction technology to produce high-quality process oils in the Middle East

The new solvent extraction plant for the production of eco-friendly, high-quality process oils (TDAE, Treated Distillate Aromatic Extract) based on the EDL license allows customers to meet the latest environmental and quality requirements and to expand their product portfolio. The new solvent extraction plant will be designed under consideration of new resource-saving technologies.

As part of the licensing, EDL carries out the required laboratory tests and prepares the PDP (Process Design Package) for the plant and the FEED (Front End Engineering Design) for the extractor section.

EDL Test Facilities

The required process parameters and the optimum process conditions are determined in EDL’s own test facilities based on customer and product requirements as well as the hydraulic data of extractor internals. This allows a safe design of the plant for the entire range of feedstock available at the customer.

High-quality products in two extraction steps

The basic principle of EDL’s technology to obtain high-quality base and process oils from vacuum distillates (lube cuts) and deasphalted oil (DAO) is a two-stage extraction process.

As a first step of extraction the aromatic compounds are removed as so called DAE (Distillate Aromatic Extract) or RAE (Residual Aromatic Extract). NMP (or furfural) is used as solvent. At the same time aromatic-rich oils are obtained that can be used to produce high-quality base oils.

In a second extraction stage using a proprietary solvent mixture, DAE and RAE are transformed into high-quality process oils such as Treated Distillate Aromatic Extract (TDAE) and Treated Residual Aromatic Extract (TRAE) having a low level of polycyclic aromatic hydrocarbons (PCA).

Eco-friendly atoxic process oils for the tire industry

DAE and RAE are required as tender oils to produce rubber products, such as tires, hoses, belts, cable insulation, floor coverings and shoe soles. Due to the high percentage of PCA being carcinogenic, mutagenic and reprotoxic DAE and RAE are no longer used today. With further processing of DAE and TAE to TDAE and TRAE resp. in the second extraction stage the limit value for PCA clearly falls below 3 percent by mass as required by European Directive 2005/69/EC without impairing the excellent properties as tender oil. Thus, a decisive contribution to the protection of human beings and the environment is made.

In addition to solvent extraction EDL also grants licenses for other technologies to produce base oils, process oils, waxes and other high-quality specialty products, such as DEWAXING / DEOILING, MICRONIZATION, AROMEX or the solvent deasphalting process SDA PLUS.

"Granting the license for the two-stage extraction technology gives proof of the fact that customers rely on our eco-friendly technologies. By further expanding our technology portfolio, for example with power to X to obtain climate-neutral fuels or with depolymerization to produce chemical raw materials from used plastics, we offer solutions for the future that provide answers to climate protection," Dr. Michael Haid (CEO of EDL) said.

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