Waste lubricating oil hydrogenation recycling method

A waste lubricating oil and hydrogen recycling technology, applied in the directions of lubricating compositions, hydrotreating processes, chemical instruments and methods, etc., can solve the problems of detachment from the outer surface of the catalyst, slow diffusion, and increased bed pressure.

Active Publication Date: 2021-03-16
青岛翌星环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common problem at present is that after the waste lubricating oil is pre-hydrogenated, there are still trace metal-containing additives, and the main ones are calcium, zinc, and magnesium metal compounds.
Since the diffusion speed of calcium, zinc, and magnesium on the surface of the inner pores of the catalyst is very slow, they are not easy to deposit in the pores of the catalyst, but continue to accumulate and grow on the outer surface of the catalyst, blocking the pores of the catalyst, and may partly detach from the outer surface of the catalyst. surface, and flows with the liquid phase material, filling in the gaps between the catalyst particles, causing the agglomeration of the catalyst bed and causing the pressure drop of the bed to rise rapidly, causing frequent shutdown of the device and replacement of the catalyst

Method used

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  • Waste lubricating oil hydrogenation recycling method
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  • Waste lubricating oil hydrogenation recycling method

Examples

Experimental program
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Effect test

Embodiment 1

[0102] The waste lubricating oil is processed according to the step of hydrogen pretreatment in the slurry bed in the method of the present invention, and the self-sulfiding oil-soluble molybdenum catalyst developed by the State Key Laboratory of Heavy Oil is used. The reaction conditions and reaction results are shown in Table 2 and Table 3. The preparation method of self-sulfurized oil-soluble molybdenum catalyst is as follows:

[0103] Weigh 30g of molybdenum trioxide, add 200mL of distilled water, then add 60mL of ammonia water (concentration: 17%), stir and heat to 40°C to dissolve. Add 360 mL of ammonium sulfide solution with a sulfur content of 8% to the solution under stirring, raise the temperature to 80° C., and stir for 2 hours to react. The liquid containing crystals was suction-filtered with a Buchner funnel, washed with distilled water, and dried at room temperature for 12 hours to obtain ammonium tetrathiomolybdate. Weigh 15g of ammonium tetrathiomolybdate and...

Embodiment 2

[0106] The waste lubricating oil is processed according to the slurry bed hydrogen pretreatment step in the method of the invention, and the self-sulfiding oil-soluble molybdenum and nickel composite catalyst developed by the State Key Laboratory of Heavy Oil is used. The reaction conditions and reaction results are shown in Table 2 and Table 3. The self-sulfurized oil-soluble molybdenum and nickel composite catalyst can choose the product obtained by any of the following preparation methods.

Embodiment 21

[0108] Weigh 30g of molybdenum trioxide, add 200mL of distilled water, then add 60mL of ammonia water (concentration: 17%), stir and heat to 40°C to dissolve. Add 360 mL of ammonium sulfide solution with a sulfur content of 8% to the solution under stirring, raise the temperature to 80° C., and stir for 2 hours to react. The liquid containing crystals was suction-filtered with a Buchner funnel, washed with distilled water, and dried at room temperature for 12 hours to obtain ammonium tetrathiomolybdate. Weigh 15g of ammonium tetrathiomolybdate and add it to dodecamonium, the molar ratio of dodecamonium / molybdenum=2.5 / 1, the reaction temperature is 60°C, and the reaction time is 1 hour to obtain the oil-soluble molybdenum-based catalyst. Precursor.

[0109] Weigh 37g of n-butanol, heat up to 80°C, add 20g of sodium hydroxide, keep the reaction temperature at 80°C, and react for 0.5 hours to obtain sodium butoxide; weigh 80g of carbon disulfide, add sodium n-butoxide to carbon ...

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PUM

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Abstract

The invention relates to a waste lubricating oil hydrogenation recycling method, which comprises two steps of slurry reactor hydrogenation pretreatment and deep hydrogenation treatment, and specifically comprises: removing mechanical impurities from waste lubricating oil, and carrying out flash evaporation to separate out free water and a part of light hydrocarbons; mixing the material at the bottom of the flash tower with hydrogen and a self-vulcanization oil-soluble transition metal catalyst, and then feeding the mixture into a slurry bed reactor for hydrogen pretreatment; separating a reaction effluent to obtain a liquid product, and carrying out hydrocyclone separation and solvent washing to remove solid residues to obtain a pretreated lubricating oil component; mixing the components with hydrogen and then enabling a mixture to enter a hydrofining reactor, an isomerization-visbreaking reactor and a supplemental refining reactor which are connected in series for hydrotreatment; andseparating reaction products to obtain high-quality naphtha, diesel oil and lubricating oil base oil. The method provided by the invention has the advantages of simple process flow, high oil product liquid yield, good lubricating oil base oil quality and the like, and can realize full-fraction resource utilization of the waste lubricating oil. In addition, the oil-soluble catalyst is simple in dispersion, free of vulcanization, small in catalyst addition amount and high in low-temperature hydrogenation activity, coking possibly occurring in the preheating process of the waste lubricating oil can be effectively avoided, and long-period stable operation of the device is guaranteed.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, more specifically, the invention relates to a process or method for hydrogenation and recycling of waste lubricating oil. Background technique [0002] my country is the third largest lubricating oil consumer in the world next to the United States and Russia, and consumes more than 6-8 million tons of lubricating oil every year. With the increase in the number of motor vehicles and the increase in the consumption of lubricating oil, the amount of waste oil replaced by vehicles and equipment has soared every year. With the decrease of petroleum resources and the continuous rise of crude oil prices, the contradiction between energy supply and demand is prominent. Therefore, the recycling and reuse of waste lubricating oil is a practical problem faced by my country's environmental protection and energy conservation, and it has increasingly attracted people's attention. [0003] The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/02C10M175/00C10G67/02B01J31/02
CPCC10M175/02C10M175/0058C10M175/0033C10M175/0041C10M175/0016C10G67/02B01J31/0238B01J31/0275B01J31/226C10G2400/04C10G2400/10B01J2531/842B01J2531/845B01J2531/847B01J2531/0213
Inventor 刘宾柴永明刘晨光潘原李奕川张孔远柳云骐
Owner 青岛翌星环保技术有限公司
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