CN-122011809-A - Method for preparing carbon black from waste wind power lubricating oil and carbon black obtained by method

CN122011809ACN 122011809 ACN122011809 ACN 122011809ACN-122011809-A

Abstract

The invention provides a method for preparing carbon black by using waste wind power lubricating oil and the carbon black prepared by the method. The method comprises the steps of 1) preliminary purification, namely standing and settling the waste wind power lubricating oil, and then filtering, 2) distillation deoiling, namely transferring the waste wind power lubricating oil subjected to the preliminary purification in the step 1) into a distillation device for reduced pressure distillation to obtain carbon-containing residues, 3) acid washing treatment, namely enabling the carbon-containing residues to react with a strong acid aqueous solution, and then washing and filtering, 4) carbonization, namely transferring the acid-washed carbon-containing residues into a carbonization furnace for carbonization under an inert atmosphere, 5) activation, namely enabling the product obtained in the step 4) to fully mix and react with an activating agent, and 6) washing and drying. The method can effectively remove impurities in the waste wind power lubricating oil, improve the purity and quality of carbon black, reduce energy consumption and cost in the production process, and realize the efficient recycling of the waste wind power lubricating oil.

Inventors

Zhang Sisuo
WANG HONGLIANG
MA XINYU
LIU XIANGHUI

Assignees

国能龙源环保有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A method for preparing carbon black using waste wind power lubricating oil, the method comprising the steps of: (1) Primary purification, namely standing and settling waste wind power lubricating oil, and then filtering; (2) The waste wind power lubricating oil after preliminary purification in the step (1) is transferred into a distillation device for reduced pressure distillation to obtain carbon-containing residues; (3) Acid washing treatment, namely, reacting carbon-containing residues with a strong acid aqueous solution, washing and filtering; (4) Carbonizing treatment, namely transferring the carbon-containing residues after acid washing into a carbonization furnace, and carbonizing under an inert atmosphere; (5) An activation treatment, namely fully mixing the product obtained in the step (4) with an activating agent for reaction, and (6) Washed and dried.
2. The method for preparing carbon black using waste wind power lubricating oil according to claim 1, wherein, In the step (1), the standing sedimentation time is 12-48 h, and/or In the step (1), impurities with a particle diameter of more than 5 μm are removed by filtration, and/or In step (1), filtration is performed using a plate and frame filter press.
3. The method for preparing carbon black using a waste wind power lubricating oil according to claim 1 or 2, wherein, In step (2), the conditions of distillative deoiling are such that the pressure is 5 to 20kPa, the temperature is 250 to 350 ℃, preferably 250 to 300 ℃, distillation is carried out until no fraction is present, and/or In the step (3), the strong acid aqueous solution is nitric acid aqueous solution, hydrochloric acid aqueous solution or sulfuric acid aqueous solution.
4. The method for producing carbon black using a waste wind power lubricating oil according to any one of claims 1 to 3, wherein, The concentration of the strong acid aqueous solution is 4-8 mol/L, and/or Allowing the carbon-containing residue to react with the strong acid aqueous solution for 1-90 h and/or Allowing the carbon-containing residue to react with the strong acid aqueous solution at 60-90 ℃ and/or The liquid-solid ratio of the strong acid aqueous solution to the carbon-containing residue is more than 10, and/or The washing in the step (3) is performed by using a mixed solution of ethanol and water for more than 20 minutes.
5. The method for preparing carbon black using a waste wind power lubricating oil according to claim 4, wherein, Allowing the carbon-containing residue to react with the strong acid aqueous solution for 2-12 h, and/or The volume ratio of ethanol in the mixed solution of ethanol and water is more than 10%.
6. The method for producing carbon black using a waste wind power lubricating oil according to any one of claims 1 to 5, wherein, In the step (4), the carbonization temperature is 600-800 ℃ and the time is more than 2 hours, and/or In step (4), the inert atmosphere is a nitrogen atmosphere.
7. The method for producing carbon black using a waste wind power lubricating oil according to any one of claims 1 to 6, wherein, In step (5), the activator is an aqueous alkaline solution, and/or In step (5), the amount of the activator used is 5 times or more, more preferably 10 to 40 times the weight of the product obtained in step (4).
8. The method for producing carbon black using a waste wind power lubricating oil according to any one of claims 1 to 7, wherein, In the step (5), the activator is potassium hydroxide or sodium hydroxide aqueous solution with the mass concentration of 4% -20%, and/or In the step (5), the reaction temperature of the activation treatment is 90-150 ℃, the reaction time is 30-240 minutes, and/or In step (6), washing with distilled water and ethanol in this order to a pH of 7, and/or In step (6), drying is performed at a temperature of 80 ℃ or higher.
9. A carbon black produced by the method for producing a carbon black using a waste wind power lubricating oil according to any one of claims 1 to 8.
10. The carbon black of claim 9, wherein, The specific surface area of the carbon black is more than 150m2/g, and/or The carbon black has an iodine absorption value of 100mg/g or more, and/or The coloring rate of the carbon black is 85% or more, preferably 90% or more.

Description

Method for preparing carbon black from waste wind power lubricating oil and carbon black obtained by method Technical Field The invention relates to the field of waste resource recycling, in particular to a method for preparing carbon black by using waste wind power lubricating oil, which aims to realize the recycling of the waste wind power lubricating oil, reduce environmental pollution and obtain a carbon black product with high added value. Background With the rapid development of the wind power industry, the production amount of waste wind power lubricating oil is increased. The waste wind power lubricating oil contains a large amount of mineral oil, additives, metal impurities and the like, and if the waste wind power lubricating oil is directly discharged or simply treated, the waste wind power lubricating oil not only causes serious pollution to the environment, but also wastes the resources contained in the waste wind power lubricating oil. Carbon black is an important industrial raw material and is widely applied to the fields of rubber, plastics, printing ink, paint and the like. The traditional carbon black production method mainly takes petroleum hydrocarbon as raw material and is prepared by incomplete combustion or thermal cracking. The method not only consumes a large amount of fossil resources, but also generates a large amount of pollutants such as waste gas, waste residue and the like in the production process. Therefore, the development of the method for preparing the carbon black by utilizing the waste wind power lubricating oil has important economic and environmental significance. At present, although some related researches on the treatment of waste lubricating oil and the preparation of carbon black exist, when the waste wind power lubricating oil is treated, due to the specificity of components (such as metal additives and complex high-molecular polymers which are special for wind power equipment, and the like), the existing treatment method has the problems of low purity of carbon black, low production efficiency, high energy consumption, and the like, and is difficult to realize large-scale industrial application. Disclosure of Invention Technical problem The invention aims to provide a method for preparing carbon black by using waste wind power lubricating oil, which can effectively remove impurities in the waste wind power lubricating oil, improve the purity and quality of the carbon black, reduce the energy consumption and cost in the production process and realize the efficient recycling of the waste wind power lubricating oil. Technical proposal According to a first aspect of the present invention, there is provided a method for preparing carbon black using waste wind power lubricating oil, the method comprising the steps of: (1) Primary purification, namely standing and settling waste wind power lubricating oil, and then filtering; (2) The waste wind power lubricating oil after preliminary purification in the step (1) is transferred into a distillation device for reduced pressure distillation to obtain carbon-containing residues; (3) Acid washing treatment, namely, reacting carbon-containing residues with a strong acid aqueous solution, washing and filtering; (4) Carbonizing treatment, namely transferring the carbon-containing residues after acid washing into a carbonization furnace, and carbonizing under an inert atmosphere; (5) An activation treatment, namely fully mixing the product obtained in the step (4) with an activating agent for reaction, and (6) Washed and dried. Preferably, in the step (1), the standing sedimentation time is 12-48 h. Preferably, in step (1), impurities having a particle size of 5 μm or more are removed by filtration. Preferably, in step (1), filtration is performed using a plate and frame filter press. Preferably, in step (2), the conditions for distillative removal are such that the pressure is 5 to 20kPa, the temperature is 250 to 350 ℃, preferably 250 to 300 ℃, and distillation is carried out until no fraction is present. Preferably, in step (3), the strong acid aqueous solution is an aqueous nitric acid solution, an aqueous hydrochloric acid solution or an aqueous sulfuric acid solution. Preferably, the concentration of the strong acid aqueous solution is 4-8 mol/L. Preferably, the reaction time of the carbon-containing residue and the strong acid aqueous solution is 1 to 90 hours, preferably 2 to 12 hours. Preferably, the temperature at which the char-containing residue reacts with the strong acid aqueous solution is 60-90 ℃. Preferably, the liquid-solid ratio of the strong acid aqueous solution to the char-containing residue is 10 or more. Preferably, the washing in the step (3) is performed with a mixed solution of ethanol and water for 20 minutes or more. Preferably, the volume ratio of ethanol in the mixed solution of ethanol and water is 10% or more. Preferably, in the step (4), the carbonization temperature is 600-800 ℃ and the time i