Method for regenerating waste lubricating oil
A waste lubricating oil and lubricating oil technology, applied in the direction of lubricating compositions, etc., can solve the problems of insufficient base oil, residual pollutants, difficult removal, etc., and achieve the effect of energy saving and simple operation
Inactive Publication Date: 2012-12-26
HEBEI JINGU RECYCLING RESOURCES DEV
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[0003] At present, my country's economy is developing rapidly, and various machinery is developing rapidly in various fields. At the same time, a large amount of waste lubricating oil is produced. The waste lubricating oil cannot be used rationally, which brings environmental pollution to the society and causes a great waste of resources.
For many years, people have used chemical methods to regenerate waste lubricating oil. This method will produce a large amount of free acid and free alkali, and the products produced are unqualified; some use high-temperature distillation to regenerate waste lubricating oil. This method will change the quality of waste lubricating oil due to high temperature. Some properties of oil will also produce high molecular polymers. This method not only produces unqualified products, but also produces some pollutant residues, which will cause secondary pollution to the environment; molecular distillation is the latest method for waste lubricating oil Regeneration technology, this method has two problems that are difficult to solve: on the one hand, it will produce a lot of peculiar smell, which is not easy to remove; on the other hand, the color is too dark to meet the requirements of base oil
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[0017] Method of the present invention comprises the steps:
[0018] (1) Put the waste lubricating oil into the settling tank, settle at 50-60°C and drain the clear water;
[0019] (2) Filter the precipitated waste lubricating oil to remove solid impurities, and carry out molecular distillation at 230-250°C and a vacuum of 0.1-10Pa to obtain semi-finished lubricating oil;
[0020] (3) deodorize the semi-finished lubricating oil obtained in step (2) in a waste lubricating oil regeneration deodorization device;
[0021] (4) Decolorize the odor-removing semi-finished lubricating oil obtained in step (3) with 5%-10% clay by weight at 80-100°C, and finally filter to obtain lubricating oil base oil.
[0022] Such as figure 1 As shown, the waste lubricating oil regeneration and deodorization device includes a primary deodorization tower 4 and a thin film evaporator 7, the model of the thin film evaporator 7 is wef-15, and the top of the primary deodorization tower 4 is connected to...
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Abstract
The invention relates to a method for regenerating waste lubricating oil. The method comprises the following steps of: precipitating and filtering waste lubricating oil and then carrying out molecule distillation; deodorizing in a waste lubricating oil regeneration and deodorization device; and then decoloring with white soil so as to obtain lubricant base oil. The method is simple to operate; and the lubricating oil subjected to the molecule distillation is deodorized twice in a primary deodorization tower and a film evaporator so that the obtained lubricant base oil has no odor, the color number of the lubricant base oil is less than 1.40 degrees, the kinematic viscosity of the lubricant base oil is 27-30m<2> / s, and the flash point of the lubricant base oil is large than 180 DEG C. Inspected by a product quality supervision and inspection department, the lubricant base oil is proved to be qualified.
Description
technical field [0001] The invention relates to a method for regenerating waste lubricating oil. Background technique [0002] Today, when resources are increasingly scarce, we should save limited resources and promote the development of circular economy in accordance with the concept of the scientific development concept. [0003] At present, my country's economy is developing rapidly, and various machinery is developing rapidly in various fields. At the same time, a large amount of waste lubricating oil is produced. The waste lubricating oil cannot be used rationally, which brings environmental pollution to the society and causes a great waste of resources. For many years, people have used chemical methods to regenerate waste lubricating oil. This method will produce a large amount of free acid and free alkali, and the products produced are unqualified; some use high-temperature distillation to regenerate waste lubricating oil. This method will change the quality of waste ...
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IPC IPC(8): C10M175/00
Inventor 赵敏仲孙达赵占群
Owner HEBEI JINGU RECYCLING RESOURCES DEV