Method for pretreating waste mineral oil and performing hydrogenation regeneration to produce lubricating base oil

A technology for lubricating base oil and waste mineral oil, which is applied in the treatment of hydrocarbon oil, lubricating composition, hydrotreating process, etc., can solve the problems of unfavorable industrialized integrated production, low lubricating oil purity, low regeneration efficiency, etc. , to achieve the effect of being conducive to continuous operation, alleviating the shortage of petroleum products, and convenient operation

Active Publication Date: 2017-01-25
新疆聚力环保科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Afterwards, carry out short-path distillation, at least through the following two stages of distillation in sequence. The operating conditions of the first-stage short-path distillation are temperature 150-250, vacuum degree 30-100Pa, fractional distillation of light lubricating oil base stock, and then the material enters the second-stage short-path distillation, Its operating conditions are temperature 180~260, vacuum degree 5~20pa, medium-quality lubricating oil base oil is evaporated, and residual oil is discharged from the bottom of the tower. The purity of regenerated lubricating oil after the pretreatment method of this technical scheme is not high, and the regeneration efficiency is not high. High, and the pretreatment steps are not easy, which is not conducive to industrialized integrated production

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take the waste mineral oil sample, as shown in sample 1 in the following table 1, after testing, the waste mineral oil raw material has dark color, low flash point, high acid value, and high heavy metal content.

[0027] The above-mentioned waste lubricating oil is treated by the pretreatment method of the present invention, which successively includes the steps of sedimentation dehydration, water washing, disc centrifuge centrifugation, horizontal centrifuge centrifugation, wiped film evaporation evaporator evaporation and vacuum distillation steps.

[0028] Specific steps are as follows:

[0029] (1) Waste mineral oil enters the settling tank first, and settles to remove water, sludge and large solid particles in the oil;

[0030] (2) Then enter the washing tank, add lye, water and demulsifier to the washing tank to remove the organic acid and water-soluble additives in the oil; wherein, the addition ratio of lye, water and demulsifier in the washing tank is 0.1~0.2:...

Embodiment 2

[0041] Get waste mineral oil sample 2, the acid value and heavy metal content of this raw material are all higher than the waste lubricating oil sample in embodiment 1.

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Abstract

The invention discloses a method for pretreating waste mineral oil and performing hydrogenation regeneration to produce lubricating base oil. The method is characterized in that: pretreatment of the waste mineral oil sequentially comprises the following steps of performing sedimentation dehydration, washing, centrifuging by using a disc-type centrifuge, centrifuging by using a horizontal centrifuge, evaporating by using a scraping film evaporator, and performing reduced pressure distillation; preheated lubricating base oil enters a hydrogenating device, enters a pre-hydrogenation protection reactor first and then enters the hydrorefining reactor to produce the high-grade lubricating base oil. By the method for pretreating the waste mineral oil and performing hydrogenation regeneration to produce the lubricating base oil, various non-ideal components in the waste lubricating oil can be effectively removed only after pretreatment provided by the invention; the method is simple in steps and is convenient to operate; manpower and material resources are saved; the lubricating base oil product is good in quality and high in yield, wastes are not produced, and no pollution is caused to the environment; operating conditions are relatively mild, using requirements on equipment are lowered, the regenerating efficiency is increased by 10-15%, continuous operation of the equipment is facilitated, and pollution of the waste oil on the environment and shortage of a petroleum product are relieved.

Description

technical field [0001] The invention relates to a method for pretreatment of waste mineral oil-hydrogenation to regenerate lubricating oil base oil, which belongs to the field of lubricating oil preparation. Background technique [0002] In terms of composition, lubricating oil is composed of 80% -90% base oil and 10% - 20% additives. The main chemical composition is a mixture of various hydrocarbons and a small amount of non-hydrocarbons. However, after the lubricating oil has been used for a period of time, the performance of the lubricating oil has deteriorated due to physical, chemical or human factors, such as aldehydes, ketones, resins, asphalt colloidal substances, carbon black and organic acids, salt, water, metal shavings, etc. Contaminated impurities can no longer be used and become waste lubricating oil. In fact, waste lubricating oil is not waste, but only a few percent of the used lubricating oil has really deteriorated. Therefore, how to effectively remove the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14C10M175/02
Inventor 杨开财
Owner 新疆聚力环保科技有限公司
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