Lubricating oil production residue recovery method

Abstract

The invention relates to the technical field of residue recovery, and especially relates to a lubricating oil production residue recovery method. The method can improve the purity of separated cerate,improve the storage stability, facilitate storage, transportation and use and improve the deoiling effect. The method includes the following steps: (1) heating, and dilution; (2) cooling crystallization: cooling of a uniformly mixed material to 30 DEG C to precipitate wax, and filtration for separating precipitated paraffin crystals; (3) solvent recovery; (4) atomization treatment: heating of theseparated paraffin crystals to 60 DEG C for remelting, spraying of the melted crystals into a spray tower through a high pressure nozzle at a high temperature, and adjustment of the pressure in the spray tower to 62-68 kPa to solidify paraffin drops into fine particles; (5) reverse absorption: spraying of a lubricating oil solvent in a direction opposite to the spraying direction of the paraffinparticles to make the lubricating oil solvent in full contact with the paraffin particles, and output of oil carrying the paraffin particles; (6) solvent recovery; and (7) melting, and molding.

Description

technical field [0001] The invention relates to the technical field of residual material recovery, in particular to a method for recovering residual material from lubricating oil production. Background technique [0002] As we all know, lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. It is between two relatively moving objects and has the function of reducing the friction between the two objects due to release. [0003] Lubricant base oil is refined from crude oil through atmospheric and vacuum distillation, solvent deasphalting, solvent refining, solvent dewaxing, clay or hydrogenation supplementary refining. The steps of solvent dewaxing process mainly include crystallization, filtration, solvent recovery and freezing The four parts are u...

AI Technical Summary

Problems solved by technology

[0003] Lubricant base oil is refined from crude oil through atmospheric and vacuum distillation, solvent deasphalting, solvent refining, solvent dewaxing, clay or hydrogenation supplementary refining. The steps of solvent dewaxing process mainly include crystallization, filtration, solvent recovery and freezing The four parts are used to separate the paraffin in the oil. The paraffin can be used as a component and packaging material of food and other commodities, as a coating material for baking containers, and as a raw material for cosmetics. It can be used for fruit preservation and to improve the anti-aging properties of rubber. It is a widely used substance in terms of increasing flexibility, insulation of electrical components, precision casting, etc., but due to the low purity of the wax paste separated from lubricating oil, it is not convenient to use directly, and its storage is stable Poor performance, which is not conducive to storage, transportation and use. The existing paraffin wax refining process generally adopts spray deoiling process to remove the oil in the paraffin wax, but the deoiling effect of the existing method is poor, and the purity of the obtained wax is low

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