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Mg-Al hydrotalcite lubricating and antifriction material prepared by using magnesite and method

A technology of anti-friction material and magnesite, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., can solve the problems of non-environmental protection and high cost, and achieve the effects of environmental protection, low cost, and excellent lubrication-anti-friction performance

Inactive Publication Date: 2012-06-27
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the defects of high cost and environmental protection of the synthetic hydrotalcite process in the prior art

Method used

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  • Mg-Al hydrotalcite lubricating and antifriction material prepared by using magnesite and method
  • Mg-Al hydrotalcite lubricating and antifriction material prepared by using magnesite and method

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Embodiment 1

[0030] In the present embodiment, the specific steps for preparing Mg-Al hydrotalcite lubricating-friction-reducing material with natural magnesite are:

[0031] 1) Prepare powder raw materials: use grinding equipment to grind, pass through a 200-mesh sieve, and the particle size of the obtained powder is: the mass of -200-mesh particles accounts for 98.5% of the total mass; the mass of +200-mesh particles accounts for 1.5% of the total mass.

[0032] 2) The natural magnesite after grinding and sieving is mixed with aluminum nitrate and nitric acid in the following ratio to make solution I:

[0033] Magnesite: aluminum nitrate = 3.0: 1 (molar ratio)

[0034] Magnesite: nitric acid = 1: 2.0 (molar ratio)

[0035] Magnesite: aluminum nitrate: nitric acid = 3:1:6

[0036] (3) Move the solution I into an airtight container, and use a magnetic stirrer to continuously stir for 5.5 hours at a temperature of 75° C., and control the rotation speed at 25-30 r / min to obtain solution II...

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Abstract

The invention provides a Mg-Al hydrotalcite lubricating and antifriction material prepared by using Mg-Al hydrotalcite prepared from magnesite and a method. The material is prepared by mixing ground and screened natural magnesite, aluminum nitrate and nitric acid in a molar ratio of (2.5-3.5): 1: (1.5-2.5), heating and stirring to form a mixed solution, adding 2mol / L of NaOH solution into the mixed solution and performing static high-temperature and high-pressure crystallization reaction, wherein the molar ratio of the NaOH to the magnesite is (2-4): 1. The component characteristic that the natural magnesite is rich in magnesium and carbon dioxide is fully utilized, the natural magnesite is not required to be calcined, and greenhouse gases are not discharged; the preparation method is simple, easy to implement, low in cost and reasonable in formula design; the granularity of the obtained material is less than 300 nanometers; and the material has good suspension stability and excellent lubricating and antifriction performance in an oily lubricating medium.

Description

technical field [0001] The invention relates to a Mg-Al hydrotalcite lubricating-antifriction material and a method prepared from Mg-Al hydrotalcite prepared from magnesite. Background technique [0002] The development of mineral materials with good lubricating and antifriction functions has always attracted much attention. The traditional technology realizes the lubrication and anti-friction of metal friction pairs by adding natural serpentine and other layered structure mineral powders, but there are problems such as difficult control of mineral powder particle size and difficult removal of impurities. Synthetic hydrotalcite has a layered structure, cations in the layers and anions between the layers are exchangeable, and have catalytic and memory functions. It is an excellent raw material for lubricating and antifriction materials. At present, most of the artificially synthesized hydrotalcites use chemical products or calcined products of natural minerals as raw materia...

Claims

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Application Information

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IPC IPC(8): C10M125/00C10M177/00C10N30/06
Inventor 白志民王晓波柴玉朴张婧宇郭蔓
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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