Preparation method of high-magnesium-content alkylbenzene magnesium sulfonate
A technology of magnesium alkyl benzene sulfonate and content, applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of low flash point and inconvenience of products
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[0020] The preparation method of the present invention mainly uses the following raw materials to prepare magnesium alkylbenzene sulfonate with high magnesium content, wherein each raw material is calculated by mass parts: 40-70 parts of base oil, 1.5-2.5 parts of α-olefin, 1-2.0 parts of maleic anhydride 20-25 parts of sulfonic acid, 5-10 parts of methanol, 30-45 parts of magnesium oxide, 100-300 parts of diluent oil, 3-6 parts of acids, 20-30 parts of water, and 40-45 parts of carbon dioxide.
[0021] The distillation range of the above base oil is 250-350°C, the molecular weight of α-olefin is 168-252, the magnesium content of magnesia is 96%-98%, and magnesia is added in two times, the magnesia added for the first time The amount of magnesium oxide added is 5-10 parts, and the amount of magnesium oxide added for the second time is 25-35 parts. Sulfonic acid is one of heavy alkylbenzenesulfonic acid, long-chain linear alkylbenzenesulfonic acid or a mixture of both. The dis...
no. 1 example
[0023] First add 61g of base oil, 2g of α-olefin (average molecular weight 252), 1.5g of maleic anhydride in the reaction flask, and then react for 300 minutes at a temperature of 190-200°C. During the reaction, the stirring speed of the materials in the reaction flask 400r / min. After the completion of the reaction, cool the reacted material to 45°C and continue to add 25g of heavy alkylbenzenesulfonic acid, 10g of methanol and 10g of magnesium oxide with a magnesium content of 96% in the reaction flask, then react for 30 minutes and increase the stirring speed to 600r / m Min, continue to add toluene 150g, alkyl salicylic acid 5g in above-mentioned reaction bottle, and continue to add surplus magnesia 30g, water 26g, then begin to pass into 40g carbonic acid gas at a constant speed continuously in reaction bottle for 5 hours and carry out carbonation reaction, And control the temperature in the reaction bottle to keep at 45-50°C until the carbonation reaction ends.
[0024] Af...
no. 2 example
[0027] First add 58g of base oil, 1.5g of α-olefin (average molecular weight 168), and 1.0g of maleic anhydride to the reaction flask, and then react at a temperature of 180-190°C for 200 minutes. During the reaction, the materials in the reaction flask are stirred The speed is 400r / min. After the reaction was completed, the reacted material was cooled to 45° C., then continued to add 30 g of long-chain linear alkylbenzenesulfonic acid, 7 g of methyl alcohol and 5 g of magnesium oxide with a magnesium content of 98% in the reaction flask for 30 minutes, and the stirring speed was increased. to 600r / min, then continue to add 200g of isobutanol, 5g of formic acid in the above-mentioned reaction flask, and continue to add surplus magnesium oxide 33g, water 28g, then start to feed 40g of carbon dioxide into the reaction flask at a constant speed for 5 hours continuously for carbonation React, and control the temperature in the above-mentioned reaction bottle to remain at 50-53° C....
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