A kind of modified complex calcium sulfonate-based grease and preparation method thereof
A compound calcium sulfonate-based lubricating grease and the technology of compound calcium sulfonate, which can be used in lubricating compositions, petroleum industry, etc., can solve the problems of reduced adhesion performance and light appearance color, etc.
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Embodiment 1
[0031] The modified complex calcium sulfonate base grease of the present embodiment is 96% complex calcium sulfonate base grease and 4% stearic acid. (% is weight percentage, the same below)
[0032] Its preparation process is as follows:
[0033] 1) Preparation of complex calcium sulfonate-based grease:
[0034] a) First mix 250g of high alkali value calcium sulfonate (base value 400), 60g of absolute ethanol, 400g of base lubricating oil (150BS, viscosity 32mm at 100°C) 2 / s) After stirring evenly, add 40g of water at room temperature, stir rapidly, heat up to 80°C and keep reacting for 60min;
[0035] b) Then add 5g of glacial acetic acid, 30g of lime emulsion, 5g of boric acid, 20g of 12-OH stearic acid, and keep the reaction at 120°C for 60min;
[0036] c) Reheat to 145°C for dehydration and keep for 20 minutes; then heat up to 210°C for refining, keep warm for 5 minutes, cool down, add 3g of antioxidant diphenylamine at 150°C, and add 200g of base lubricating oil at 1...
Embodiment 2
[0039] The modified complex calcium sulfonate base grease of the present embodiment is 99.5% complex calcium sulfonate base grease and 0.5% stearic acid.
[0040] Its preparation process is as follows:
[0041] 1) Preparation of complex calcium sulfonate-based grease:
[0042] a) First mix 350g of high alkali value calcium sulfonate (base value 380), 50g of absolute ethanol, 450g of base lubricating oil (150BS, viscosity 32mm at 100°C) 2 / s) After stirring evenly, add 60g of water at room temperature, stir rapidly, heat up to 80°C and keep reacting for 60min;
[0043] b) Then add 10g of glacial acetic acid, 40g of lime emulsion, 8g of boric acid, 30g of 12-OH stearic acid, and keep the reaction at 120°C for 60min;
[0044] c) Reheat to 145°C for dehydration and keep for 20 minutes; then heat up to 210°C for refining, keep warm for 5 minutes, cool down, add 5g of antioxidant diphenylamine at 150°C, and add 200g of base lubricating oil at 110°C to obtain a compound Calcium su...
Embodiment 3
[0047] The modified complex calcium sulfonate base grease of the present embodiment is 98% complex calcium sulfonate base grease and 2% stearic acid.
[0048] Its preparation process is as follows:
[0049] 1) Preparation of complex calcium sulfonate-based grease:
[0050] a) First mix 3000g of high alkali value calcium sulfonate (base value 420), 400g of absolute ethanol, and 5000g of base lubricating oil (150BS, viscosity 32mm at 100°C) 2 / s) After stirring evenly, add 500g of water at room temperature, stir rapidly, heat up to 80°C and keep reacting for 60min;
[0051] b) Then add 60g of glacial acetic acid, 600g of lime emulsion, 500g of boric acid hot water solution (90°C, containing 100g of boric acid), 400g of 12-OH stearic acid, and keep it at 120°C for 60min;
[0052] c) Then raise the temperature to 145°C for dehydration and keep for 20 minutes; then raise the temperature to 210°C for refining, keep the temperature for 5 minutes, cool down, add 30g of antioxidant d...
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