Composite aluminum soap grease and preparation method thereof
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A technology for base grease and lubricating grease, applied in the field of composite aluminum base grease and its preparation, can solve the problems of single technology and high cost, and achieve the effect of overcoming low reactivity, low cost and good stability
Inactive Publication Date: 2012-06-13
ANHUI UNIVERSITY OF TECHNOLOGY
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[0006] Aiming at the technical problems of single technology and high cost in the existing aluminum soap synthesis technology, the present invention provides a composite aluminum-based lubricating grease and a preparation method thereof. The preparation method uses cheap sodium metaaluminate to saponify the composite aluminum-based lubricating grease
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Embodiment 1
[0020] Example 1: Add 100g of 150BS base oil into an atmospheric pressure esterification kettle, stir and heat up to 60°C, add 0.5g of benzoic acid, 12g of stearic acid, and 7g of 12-hydroxystearic acid, and stir at constant temperature until completely dissolved. Raise the temperature to 100°C, add 1.5g of sodium metaaluminate, saponify at 105°C for 2 hours at low temperature, then slowly raise the temperature to 170°C for 2 hours at medium temperature. Then, continue to heat up to 200 ° C high temperature refining for 1 hour. Finally, add 79g of 150BS base oil, stir, cool, grind, and degas to obtain the composite aluminum-based grease.
Embodiment 2
[0021] Example 2: Add 100g of PAO-20 (polyalphaolefin) base oil into an atmospheric pressure esterification kettle, stir and raise the temperature to 60°C, add 3g of benzoic acid and 16g of stearic acid respectively, and stir at constant temperature until completely dissolved. Raise the temperature to 100°C, add 2g of sodium metaaluminate, saponify at 105°C for 2 hours at low temperature, then slowly raise the temperature to 170°C for 2 hours at medium temperature. Then, continue to heat up to 200 ° C high temperature refining for 1 hour. Finally, 79 g of PAO-20 base oil was added, stirred, cooled, ground and degassed to obtain a composite aluminum-based grease.
Embodiment 3
[0022] Example 3: Add 100g of 150BS base oil into an atmospheric pressure esterification kettle, stir and raise the temperature to 60°C, add 6g of benzoic acid and 12g of stearic acid respectively, and stir at constant temperature until completely dissolved. Raise the temperature to 110°C, add 3 g of sodium metaaluminate, saponify at 120°C for 2 hours at low temperature, then slowly raise the temperature to 160°C for 2 hours at medium temperature. Then, continue to heat up to 210 ° C high temperature refining for 1 hour. Finally, add 79g of 150BS base oil, stir, cool, grind, and degas to obtain the composite aluminum-based grease.
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Abstract
The invention provides composite aluminum soap grease and a preparation method thereof, and belongs to the technical field of lubricating grease preparation. The lubricating grease comprises the following constituents by weight: 5 to 9 percent of C12 to C18 saturated straight-chain fatty acid, 0 to 4 percent of C12 to C18 saturated hydroxy fatty acid, 0.25 to 3 percent of aromatic acid, 0.5 to 1.5 percent of sodium metaaluminate, and 83 to 92 percent of base oil. The preparation method comprises the following steps: adding part of the base oil into a normal-pressure esterifying kettle; stirring; adding the aromatic acid, the C12 to C18 saturated straight-chain fatty acid and the saturated hydroxy fatty acid when the temperature reaches 60 to 80 DEG C; stirring at a constant temperature till the aromatic acid, the C12 to C18 saturated straight-chain fatty acid and the saturated hydroxy fatty acid are dissolved completely; adding the sodium metaaluminate when the temperature reaches 100 to 120 DEG C; saponifying at a low temperature for 1 to 4 hours; saponifying for 1 to 3 hours when the temperature reaches 160 to 180 DEG C; refining for 0.5 to 2 hours when the temperature reaches 200 to 200 DEG C; adding the rest base oil; stirring; cooling; grinding; and degassing to obtain the composite aluminum soap grease. The composite aluminum soap grease prepared by the invention has the advantages of high drop point, favorable mechanical stability and excellent rustproof performance.
Description
technical field [0001] The invention belongs to the technical field of lubricating grease preparation, and in particular relates to a composite aluminum-based lubricating grease and a preparation method thereof. Background technique [0002] Composite aluminum-based grease has the advantages of high dropping point and good oxidation resistance. It is suitable for the lubrication of high-temperature equipment such as steelmaking, steel rolling and sintering in the metallurgical industry. It is a high-temperature resistant grease with excellent performance. At the same time, aluminum-based grease also has excellent high-temperature reversibility and good pumpability, especially suitable for centralized lubrication. In addition, aluminum-based grease also has good water resistance and certain anti-wear and lubricating properties. Therefore, composite aluminum-based grease has good application prospects in high-temperature lubrication fields such as metallurgy, machinery, and c...
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