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A method for preparing two-dimensional materials using waste grease

A technology of two-dimensional materials and waste grease, applied in the direction of lubricating compositions, chemical instruments and methods, graphene, etc., can solve the problems of no suitable recycling method, non-reusable, expensive, etc., and achieve less defects and lower regeneration costs Low, quality-controllable effects

Active Publication Date: 2020-05-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prices of fatty acid lithium and lubricant grade molybdenum disulfide and graphite are very expensive, and there is no suitable recycling method at present. Most of the molybdenum disulfide lithium-based grease and graphite lithium-based grease cannot be reused. Some enterprises Even dumping it as waste without any treatment may cause serious soil pollution

Method used

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  • A method for preparing two-dimensional materials using waste grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]Use petroleum ether to wash and collect the waste molybdenum disulfide lithium base grease from the lubricating part of a certain mining machinery to obtain 1L of waste grease collection liquid. The mass fraction of waste grease in the waste grease collection liquid is 10wt%. The grease collection solution was stirred at a speed of 100rpm for 2h, then centrifuged at a speed of 200rpm for 0.5h, and the upper liquid phase was obtained and then centrifuged at a speed of 12000rpm for 1h, and the solid particles A collected were dried. , weighing 3.80g, the solid phase particle A is placed in an acidic aqueous solution with a pH of 3.5, and the liquid phase exfoliation is strengthened under the assistance of ultrasonic waves. The mass fraction of the solid phase particle A in the aqueous solution is 0.5wt%, and the solution temperature The temperature is 25°C, the ultrasonic frequency is controlled to 40kHz, and the treatment time is 4h to obtain a solid phase suspension. The...

Embodiment 2

[0041] Adopt diesel oil to wash and collect waste graphite lithium-based grease from the lubricating part of a certain mechanical manufacturing equipment to obtain 1L of waste grease collection liquid, the mass fraction of waste grease in the waste grease collection liquid is 10wt%, and waste grease The collected liquid was stirred at a speed of 600rpm for 0.5h, and then centrifuged at a speed of 800rpm for 0.5h, and the upper liquid phase was obtained and then centrifuged at a speed of 15000rpm for 1h, and the collected solid particles A were dried. Finally, weighing 2.6g, the solid particle A is placed in an acidic aqueous solution with a pH of 4.0, and the liquid phase exfoliation is strengthened under the assistance of ultrasonic waves. The mass fraction of the solid particle A in the aqueous solution is 3%, and the solution temperature is 50 °C, the ultrasonic frequency is controlled at 100kHz, and the treatment time is 0.5h to obtain a solid phase suspension. The solid p...

Embodiment 3

[0043] Gasoline is used to wash and collect the waste molybdenum disulfide-graphite lithium-based composite grease from the lubricating part of the train mechanical transmission equipment. Obtain 5L of waste lubricating grease collection liquid, the mass fraction of waste lubricating grease in the waste lubricating grease collection liquid is 5wt%, the waste lubricating grease collection liquid is then stirred at a speed of 300rpm for 1h, and then centrifuged at a speed of 300rpm for 1h , obtain the upper liquid phase part and then centrifuge at a speed of 15000rpm for 2h to collect the solid particle A, dry the solid particle A, weigh 7.3g, and place the solid particle A in an acidic aqueous solution with a pH of 1.0. The liquid phase exfoliation strengthening was carried out under the assistance of ultrasonic waves. The mass fraction of solid particles A in the aqueous solution was 8%, the solution temperature was 30°C, the ultrasonic frequency was controlled at 50 kHz, and t...

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Abstract

The invention discloses a method for preparing a two-dimensional material by using waste grease. The method takes waste grease as a raw material, insoluble solid particles in the waste grease are extracted, and the insoluble solid particles are subjected to reinforcement through a liquid-phase delamination layer, and separation and purification to obtain the two-dimensional material. The method has the advantages of simple and easy process, controllable quality, low regeneration cost by changing waste into valuables, and high product added value, has practical popularization and application value, and can generate obvious social, economic and environment benefits.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and environmental protection, and relates to a method for preparing a two-dimensional material by using waste lubricating grease. Background technique [0002] In today's industrial production process, lubricating products are widely used, and the more industrialized countries usually consume more lubricating products. At present, China, as the largest emerging economy in the world, is speeding up the process of industrialization in an all-round way, and the amount of lubricating products it consumes is increasing day by day, which leads to the generation of a large amount of waste lubricating oil and waste grease. my country has carried out a lot of research on waste lubricating oil treatment and regeneration, and has developed some waste lubricating oil treatment and purification regeneration processes. However, the research on waste lubricating grease in our country is still rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/06C01B32/19C10M125/22
CPCC01B2204/04C01B2204/32C01G39/06C01P2006/12C10M125/22C10M2201/041C10M2201/066
Inventor 孙伟纪效波唐鸿鹄侯红帅江锋李思杰周嘉辉
Owner CENT SOUTH UNIV
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