Lubricating grease special for food machines and preparation method thereof
A technology of food machinery and lubricating grease, which is applied in the direction of lubricating composition and petroleum industry, etc. It can solve the problems that the use temperature of anhydrous calcium can only reach 100°C and cannot meet the lubrication requirements of high-temperature equipment, and achieve the effect of excellent corrosion resistance
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Embodiment 1
[0027] (1) Add 300g of food-grade mineral white oil into the reaction kettle, stir and heat, raise the temperature to 80°C, add 56g of lauryl hydroxystearic acid, after dissolving, continue to heat up to 90°C, add 7.5g of lithium hydroxide and 15g of calcium hydroxide Aqueous solution, stir and mix evenly, then keep the temperature for 30min;
[0028] (2) Continue to heat up after the constant temperature is over, and add an aqueous solution containing 1.5g of boric acid when the temperature is raised to 100-110°C, stir well and then keep the temperature for 30 minutes;
[0029] (3) After the constant temperature is over, dehydrate, then raise the temperature to 140°C for 1 hour, then raise the temperature to 220°C for 10 minutes of high-temperature refining, continue to stir and cool down, and add 3.5g polytetrafluoroethylene powder when the temperature drops below 90°C, The mixture of 7g Siben-80 and 3g barium dinonyl naphthalene sulfonate is mixed evenly, and then the greas...
Embodiment 2
[0031] (1) Add 250g of food-grade synthetic oil into the reaction kettle, stir and heat, heat up to 80°C, add 60g of stearic acid, after dissolving, continue to heat up to 90°C, add an aqueous solution containing 10g of lithium hydroxide and 10g of calcium hydroxide, stir and mix well After constant temperature for 30min;
[0032] (2) Continue to heat up after the constant temperature is over, and add an aqueous solution containing 1g of boric acid when the temperature rises to 100-110°C, stir well and then keep the temperature for 30 minutes;
[0033] (3) Dehydration after the constant temperature is over, then raise the temperature to 140°C for 1 hour, then raise the temperature to 220°C for 10 minutes of high-temperature refining, continue to stir and cool down, when the temperature drops below 90°C, add 5g of polytetrafluoroethylene powder, 5.2 The mixture of g Siben-80 and 2.8g barium dinonyl naphthalene sulfonate is stirred and mixed evenly, and then the grease is discha...
Embodiment 3
[0035] (1) Add 350g of food-grade mineral white oil into the reaction kettle, stir and heat, heat up to 80°C, add 50g of benzoic acid, after dissolving, continue to heat up to 90°C, add an aqueous solution containing 5g of lithium hydroxide and 20g of calcium hydroxide, stir and mix well After constant temperature for 30min;
[0036] (2) Continue to heat up after the constant temperature is over, and add an aqueous solution containing 3g of boric acid when the temperature is raised to 100-110°C, stir well and then keep the temperature for 30 minutes;
[0037] (3) Dehydration after the constant temperature is over, then raise the temperature to 140°C for 1 hour, then raise the temperature to 220°C for 10 minutes of high-temperature refining, continue to stir and cool down, when the temperature drops below 90°C, add 3g of polytetrafluoroethylene powder, 9.6 The mixture of g Siben-80 and 2.4g barium dinonyl naphthalene sulfonate is stirred and mixed evenly, and then the grease is...
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