Method for refining base oil for lubricating oil

Abstract

The invention provides a method for refining the base oil for the lubricating oil, comprising the following steps: A, heating the base oil for the lubricating oil, which is stored in a storage tank, to a first temperature, and outputting into a heat exchanger; B, heating the base oil for the lubricating oil, which is outputted into the heat exchange, to a second temperature by the heat exchange, and outputting into a fixed bed; C, adsorbing the base oil for the lubricating oil by the fixed bed, and outputting into filters; D, filtering the base oil for the lubricating oil by a coarse filter and a fine filter in sequence; E, observing the chrominance of the filtered base oil for the lubricating oil, carrying out the step F if the chrominance of the filtered base oil for the lubricating oil meets the output requirement, and outputting the filtered base oil for the lubricating oil into the storage tank if the chrominance of the filtered base oil for the lubricating oil does no meet the output requirement; and F, outputting the base oil for the lubricating oil into a refined oil tank. The method for refining the base oil for the lubricating oil adopts the fixed bed to adsorb the base oil for the lubricating oil, thereby having the advantages of mild pollution and good adsorption performance.

Description

technical field [0001] The invention relates to the field of petroleum refining, in particular to a method for refining lubricating base oil. Background technique [0002] The base oil obtained by molecular distillation also contains impurities such as azo, asphalt colloid, organic pigments, naphthenic acid, and trace metals decomposed by additives, odors, distillation entrained substances, etc., which need to be refined to improve the stability of the base oil. Keep the base oil with good physical and chemical properties. [0003] In the process of petroleum refining, lubricating oil production class I base oil is generally supplemented and refined with white clay: the process flow is to mix white clay and base oil in a reaction kettle, heat and stir, let stand, and then press filter with a plate and frame filter. The equipment has a white clay feeding device, and the investment cost of the whole device is large, and the energy consumption is also high. [0004] In additi...

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Problems solved by technology

[0003] In the process of petroleum refining, lubricating oil production class I base oil is generally supplemented and refined with white clay: the process flow is to mix white clay and base oil in a reaction kettle, heat and stir, let stand, and then press filter with a plate and frame filter. The equipment has a white clay feeding device, the investment cost of the whole device is large, and the energy consumption is also high

[0004] In addition, because the oil content of the clay adsorption residue is as high as about 46% (clay dry basis), the amount of use is relatively large, so its use is disposable and cannot be reused, and the disposal of solid waste needs to be incinerated, and the cost is about 2,000 Yuan / ton, not only the production cost is high, but also the processing process is complicated

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