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A kind of waste lubricating oil hydrorefining pretreatment method

A technology for hydrotreating pretreatment and waste lubricating oil, applied in hydrotreating process, treating hydrocarbon oil, chemical instruments and methods, etc. The effect of enhancing catalytic active sites, reducing energy consumption for dehydration, and reducing moisture content

Active Publication Date: 2021-06-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of lubricating oil, due to contamination by foreign impurities, water absorption, thermal decomposition, oxidation, dilution, etc., aldehydes, ketones, resins, asphalt colloidal substances, carbon black, organic acids, and salts are formed in the lubricating oil. , water, metal shavings and other polluting impurities change the original physical and chemical properties and become waste lubricating oil, which cannot be continued to be used
[0003] Most of the existing waste lubricating oil recycling methods first remove the water and impurities in the waste lubricating oil to reduce the subsequent process operation pressure and energy consumption. However, a large amount of energy is consumed in the process of dehydration and impurity removal, and the removal effect is mediocre.

Method used

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  • A kind of waste lubricating oil hydrorefining pretreatment method
  • A kind of waste lubricating oil hydrorefining pretreatment method
  • A kind of waste lubricating oil hydrorefining pretreatment method

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preparation example Construction

[0036] Microwave pyrolysis catalyst preparation method of the present invention specifically comprises the following steps:

[0037] Step 1, under the condition of isolated air, add A in the ball mill in sequence n B m Components of type metal mixtures, for A n B m Type metal mixture is divided into dry ball milling to obtain catalytic component A. The ball milling conditions are as follows: a number of mixed quartz balls with a diameter of 5mm to 35mm are used for ball milling. In terms of mass parts, the mixed quartz balls include: 30 parts of 5mm quartz balls, 25 parts of 15mm quartz balls, 25 parts of 25mm quartz balls, and 10 parts of 30mm quartz balls Balls and 10 parts of 35mm quartz balls, (20-40): 1, the speed of the ball mill is 120r / min-180r / min, the milling time is 12h-24h, and the protective gas is nitrogen;

[0038] Step 2: Add activated semi-coke powder that meets the particle size requirements after activation into deionized water, the ratio of deionized wa...

Embodiment 1

[0043] The preparation process of the microwave pyrolysis catalyst of the present embodiment is:

[0044] Add 10g of A in the ball mill in sequence n B m Each component of the type metal mixture (A n B m Type metal mixture, containing 2g of CoO, 2g of MoS 2 and 6g of Fe 3 o 4 ), using nitrogen as a protective gas, ball milling at a speed of 120r / min for 12h to prepare catalytic component A. Add 90 g of activated blue charcoal powder with a particle size of less than 76 μm into 450 mL of deionized water, shake at a constant temperature of 40°C for 6 hours at a shaking speed of 60 r / min, and obtain a mixed solution B. Add 10 g of catalytic component A to the mixed solution B, and ultrasonicate at a constant temperature of 40° C. for 2 hours at a frequency of 120 KHz to obtain a mixed solution C. Heat and boil the mixed liquid C until the water in the suspension is evaporated to dryness, and then dry in a vacuum oven for 24 hours to obtain a black solid D, which is the mic...

Embodiment 2

[0046] The preparation process of the microwave pyrolysis catalyst of the present embodiment is:

[0047] Add 10g of A in the ball mill in sequence n B m Each component of the type metal mixture (A n B m Type metal mixture, containing 2g of CoO, 2g of MoS 2 and 6g of Fe 3 o 4 ), using nitrogen as a protection, ball milling at a speed of 120r / min for 12h to prepare catalytic component A. Add 120 g of activated blue carbon powder with a particle size of less than 76 μm into 450 mL of deionized water, and shake at a constant temperature of 40°C for 6 hours at a shaking speed of 60 r / min to obtain a mixed solution B. Add 10 g of catalytic component A to the mixed solution B, and ultrasonicate at a constant temperature of 40° C. for 2 hours at a frequency of 120 KHz to obtain a mixed solution C. Heat and boil the mixed liquid C until the water in the suspension is evaporated to dryness, and then dry in a vacuum oven for 24 hours to obtain a black solid D, which is the microw...

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Abstract

The invention relates to the technical field of resource recovery and utilization, in particular to a hydrofining pretreatment method for waste lubricating oil, which uses microwave radiation and catalytic hydrogenation to improve the quality of waste lubricating oil, and is mainly used before dehydration and impurity removal of waste lubricating oil . The specific process is: adding a microwave pyrolysis catalyst to the waste lubricating oil, and performing microwave hydrogenation pretreatment; during the microwave hydrogenation pretreatment process, passing dry hydrogen-rich gas into the waste lubricating oil, and continuously stirring. The content of light oil in the waste lubricating oil pretreated by the invention is greatly increased, the utilization rate of raw materials is improved, the moisture content is reduced, the difficulty of post-treatment is reduced, the recovery rate of waste lubricating oil and product quality are improved, and economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of resource recovery and utilization, in particular to a hydrofining pretreatment method for waste lubricating oil. Background technique [0002] With the rapid development of my country's petroleum, machinery, power, transportation and other industries, the consumption of lubricating oil is increasing year by year. In 2012, the consumption of lubricating oil in my country was 7.1 million tons, and by the end of 2017, the consumption of lubricating oil in my country had exceeded 10 million tons. However, during the use of lubricating oil, due to contamination by foreign impurities, water absorption, thermal decomposition, oxidation, dilution, etc., aldehydes, ketones, resins, asphalt colloidal substances, carbon black, organic acids, and salts are formed in the lubricating oil. , water, metal filings and other polluting impurities have changed the original physical and chemical properties and become waste l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02B01J23/881B01J23/882
CPCB01J23/002B01J23/881B01J23/882B01J2523/00C10G67/02B01J2523/845B01J2523/842B01J2523/68
Inventor 周军吴雷梁坤侯治威宋永辉张秋利田宇红邢相栋兰新哲
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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