Metal detergent and preparation method thereof and lubricant oil containing metal detergent

A method for preparing sulfurized calcium alkyl phenolate, consisting of the following steps:

• a) mixing alkyl phenol, a calcium source, base oil, alkyl benzenesulfonic acid, fatty acid, fatty alcohol and polyisobutylene succinic anhydride to obtain a mixed solution, wherein
• the alkyl phenol is one or more of hexyl phenol, heptyl phenol, octyl phenol, nonyl phenol, decyl phenol, undecyl phenol, dodecyl phenol, tridecyl phenol, tetradecyl phenol and pentadecyl phenol, the calcium source is calcium oxide and/or calcium hydroxide, the base oil is one or more of 100SN base oil, 150SN base oil, 200SN base oil, 220SN base oil, 250SN base oil, 300SN base oil, 350SN base oil, 400SN base oil, 450SN base oil and 500SN base oil;
• the alkyl benzenesulfonic acid is one or more of dodecyl benzenesulfonic acid, tridecyl benzenesulfonic acid, tetradecyl benzenesulfonic acid, pentadecyl benzenesulfonic acid, hexadecyl benzenesulfonic acid, heptadecyl benzenesulfonic acid, octadecyl benzenesulfonic acid, nonadecyl benzenesulfonic acid, eicosyl benzenesulfonic acid, heneicosyl benzenesulfonic acid, docosyl benzenesulfonic acid, tricosyl benzenesulfonic acid and tetracosyl benzenesulfonic acid;
• the fatty acid is one or more of tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid and octadecanoic acid;
• the fatty alcohol is one or more of tetradecyl alcohol, pentadecyl alcohol, cetyl alcohol, heptadecanol, octadecyl alcohol, nonadecyl alcohol and eicosanol;
• the polyisobutylene succinic anhydride has a number average molecular weight of 2,400-3,380;
• and the polyisobutylene succinic anhydride has a polymerization degree of 16-22;
• the mass ratio of the alkyl phenol, the calcium source, the base oil, the alkyl benzenesulfonic acid, the fatty acid, the fatty alcohol and the polyisobutylene succinic anhydride is 110-130:48-70:100-120:9-11:12-14:8-9:1.2-2.7;
• b) mixing the mixed solution, ethylene glycol and a sulfur source to carry out sulfurization reaction in the presence of a sulfurization accelerator to obtain a sulfurization reaction solution, wherein
• the sulfur source is sulfur, the sulfurization accelerator is sulfurization accelerator NS and/or sulfurization accelerator DM, the mass ratio of the ethylene glycol to the alkyl phenol in the mixed solution is 35-50:
• 110-130;
• the mass ratio of the sulfur source to the alkyl phenol in the mixed solution is 18-24:110-130, the mass ratio of the sulfurization accelerator to the alkyl phenol in the mixed solution is 0.6-1.3:110-130, the sulfurization reaction is carried out at 145-185° C. for a time of 6-12 h;
• c) implementing carbonation reaction between the sulfurization reaction solution and CO2 to obtain a carbonation reaction solution;
• wherein
• implementing carbonation reaction between the sulfurization reaction solution and CO2 is realized by introducing CO2 gas into the sulfurization reaction solution, the mass ratio of CO2 to the alkyl phenol in step a) is 37-54:110-130, the temperature for the carbonation reaction is 145-180° C., the time for the carbonation reaction is 3-7.5 h;
• before implementing carbonation reaction between the sulfurization reaction solution and CO2, the sulfurization reaction solution is dehydrated at first, the dehydration is conducted in a water segregator;
• the operating temperature of the water segregator is controlled at 150-170° C., during the dehydration process, the water content in the sulfurization reaction solution is continuously reduced, when the water content in the sulfurization reaction solution has been reduced to 2.5-3.1 wt %, the dehydration is stopped, and carbonation reaction is carried out;
• and
• d) extracting the carbonation reaction solution with a solvent, upon refining, to obtain the sulfurized calcium alkyl phenolate;
• wherein
• the solvent includes solvent oil, water and oxygenous derivative of hydrocarbon;
• the solvent oil has a boiling point greater than 100° C.;
• the solvent oil is one or more of 100# solvent oil, 120# solvent oil, 140# solvent oil, 150# solvent oil, 180# solvent oil, 190# solvent oil, 200# solvent oil, 260# solvent oil, 270# solvent oil, 280# solvent oil, 300# solvent oil and 330# solvent oil;
• the oxygenous derivative of hydrocarbon is alcohol and/or ketone, wherein the alcohol is one or more of methanol, ethanol and propanol, the ketone is one or more of acetone, butanone and butanedione;
• the oxygenous derivatives of hydrocarbon are alcohol and ketone;
• the mass ratio of alcohol to ketone is 136-250:2-8;
• the mass ratio of the solvent oil, the oxygenous derivatives of hydrocarbon and water is 180-350:140-252:4-10;
• and
• the mass ratio of the solvent to the alkyl phenol in step a) is 408-650:110-130.