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Preparation and application method for hydrated magnesium phosphate

A technology of hydrated magnesium phosphate and magnesium salt, applied in the direction of chemical instruments and methods, phosphorus compounds, lubricating compositions, etc., can solve problems such as reporting, and achieve the effects of reducing pollution, reducing friction coefficient, and reducing production costs

Inactive Publication Date: 2011-08-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MgHPO 4 1.2H 2 O is also an inorganic material with a layered crystal structure, and there are no reports on its application in solid lubricants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] Take the MgCl whose concentration is 3.78mol / L 2 Solution 29.3ml, the concentration is 25.5 grams of phosphoric acid solution of 42.5%, in the glass beaker, after stirring and mixing evenly, add the concentration of 9.73mol / L sodium hydroxide solution 22.7ml, adjust the pH value to 6.8, and then stir evenly after 15 minutes Finally, the obtained white gel was sealed into a polytetrafluoroethylene-lined reactor, and the reactor was placed in an oven at 180°C. After crystallization for 150 hours, the reactor was taken out and separated by a conventional centrifugation method. The obtained solid product is washed with distilled water to neutrality, and after drying at room temperature, a hydrated magnesium phosphate product used as a solid lubricant is obtained. Add 1.0wt% hydrated magnesium phosphate product to No. 100 base oil, compared with No. 100 base oil, the prepared oil has a higher carrying capacity of P B Increased by 21.4%, friction coefficient f value decrease...

Embodiment approach 2

[0020] Take MgCl with a concentration of 1.0mol / L 2 Solution 50.0ml, the concentration is 20.0% phosphoric acid solution 24.5 grams, in the glass beaker after stirring and mixing evenly, add the concentration and be 3.0mol / L sodium hydroxide solution 29.7ml, adjust the pH value to be 4.0, after 10 minutes stir again Finally, the obtained white gel was sealed into a polytetrafluoroethylene-lined reactor, and the reactor was placed in an oven at 120°C. After crystallization for 200 hours, the reactor was taken out and separated by a conventional centrifugation method. The obtained solid product is washed with distilled water to neutrality, and after drying at room temperature, a hydrated magnesium phosphate product used as a solid lubricant is obtained. Adding 0.5wt% hydrated magnesium phosphate product to No. 100 base oil, compared with No. 100 base oil, the prepared oil has a bearing capacity of P B Increased by 15.3%, friction coefficient f value decreased by 9.2%.

Embodiment approach 3

[0022] Take 35.0ml of magnesium acetate solution with a concentration of 4.0mol / L, 9.94 grams of phosphoric acid solution with a concentration of 80.0%, stir and mix evenly in a glass beaker, add 43.3ml of sodium hydroxide solution with a concentration of 4.1mol / L, and adjust the pH The value is 8.0, and after 15 minutes of stirring evenly, the obtained white gel is sealed into a polytetrafluoroethylene-lined reactor, and the reactor is placed in an oven at 200°C. After crystallization for 2 hours, the reactor is taken out , using a conventional centrifugation method for separation, the obtained solid product is washed with distilled water to neutrality, and after drying at room temperature, a hydrated magnesium phosphate product used as a solid lubricant is obtained. Adding 1.5wt% hydrated magnesium phosphate product to No. 100 base oil, compared with No. 100 base oil, the prepared oil has a bearing capacity of P B Increased by 23.5%, the friction coefficient f value decrease...

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Abstract

The invention relates to a preparation and application method for hydrated magnesium phosphate, belonging to the technical field of inorganic applied materials. The preparation and application method is characterized in that the preparation and application method for hydrated magnesium phosphate directly serving as a solid lubricant takes sodium hydroxide or potassium hydroxide as an alkaline solution regulator and comprises steps as follows: a magnesium salt solution and a phosphoric acid solution are mixed according to 0.4 to 2.0 (molar ratio) of MgO:P2O5, the pH value of the mixture is adjusted to be in the range of 4.0 to 8.0 after the magnesium salt solution and the phosphoric acid solution are evenly stirred, white gel is obtained after stirring for 10 to 20 minutes; the white gel is sealed in a polytetrafluoroethylene lining reactor, crystallization is carried out for 2 to 200 hours in a drying oven of 120 to 200 DEG C, the solid product obtained through centrifugal separation is washed by distilled water to be natural; and the product is obtained after being dried at the room temperature. Raw materials for the preparation method are easy to obtain; a synthetic method is simple and has less pollution to environments; the hydrated magnesium phosphate has good load bearing and antifriction performances and can be directly used as the solid lubricant.

Description

technical field [0001] The invention relates to a preparation and application method of hydrated magnesium phosphate, which belongs to the field of inorganic application materials, and specifically relates to a technical scheme of a preparation and application method of a hydrated magnesium phosphate material used as a solid lubricant. Background technique [0002] Currently, MgHPO 4 1.2H 2 The preparation of O is a hydrothermal synthesis method, which mainly involves J.Chen, et al, J.Solid State Chem., 1993, 103, 519; A.Bensalem, et al, J.Solid State Chem., 1995, 114 , 598; A. Bensalem, et al, Matmialr Research Bulletin, 1995, 30, 1471 three related literature. J.Chen used diethylamine as the alkaline regulator of the solution in the synthesis to regulate the pH value of the solution to generate hydrated magnesium phosphate. A.Bensalem, et al first used ammonia as the alkaline regulator of the solution to regulate the pH value of the solution, and obtained MgHPO 4 0.78H...

Claims

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Application Information

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IPC IPC(8): C01B25/34C10M125/24
Inventor 董晋湘张效胜徐红张家齐董林坤
Owner TAIYUAN UNIV OF TECH
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