Preparation method of single sulfur substituted phosphate amine salt lubricating oil additive

Abstract

An ammonium trhiophosphate as an extreme-pressure antiwear additive of lubricating gear oil is prepared from phosphite, lipoamine, and sulfide.

Description

(1) Technical field

[0001] The invention relates to a preparation method of a lubricating oil additive, in particular to a preparation method of monothiophosphate amine salt, belonging to the field of lubricating oil additives. (2) Background technology

[0002] As we all know, in all kinds of heavy-duty gear transmission lubricants, the gear oil must have high-torque low-speed bearing performance and high-speed impact anti-abrasion performance, and must have excellent rust resistance, corrosion resistance, emulsification resistance and oxidation resistance. Sex, which will be solved by various additives. The extreme pressure agent that meets the high-speed impact and anti-abrasion performance is usually a sulfurized olefin, and there is no other compound that can replace it. The anti-wear agent that satisfies the high torque and low speed load-bearing performance is usually a phosphorus-containing agent. There are many types of phosphorus-containing agents. Phosphorous-con...

Examples

Embodiment 1

[0012] In a 500ml three-neck flask equipped with electric stirring, thermometer and condenser, put 134g of octadecyl primary amine, 100g of dialkyl phosphite, and react at 30°C for 4.5h; then add 130g of trisulfide, under N 2 Under gas protection, slowly raise the temperature to 170°C for 6.5 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt 352g, the product is a yellow transparent liquid, S% 15.76, P% 8.33, N% 1.65.

Embodiment 2

[0014] In the 500ml three-neck flask with electric stirring, thermometer and condenser installed, drop 134g dihexylamine, 100g dialkyl phosphite, 130g trisulfide, in N 2 Under gas protection, slowly raise the temperature to 160°C for 14 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt, the product is a yellow transparent liquid, S% 15.68, P% 7.95, N% 1.76.

Embodiment 3

[0016] In a 500ml three-neck flask equipped with electric stirring, thermometer and condenser, put 134g of octadecyl primary amine, 100g of dialkyl phosphite, and react at 30°C for 4.5h; then add 30g of sulfur powder, 2 Under gas protection, slowly raise the temperature to 170°C for 5 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt 250g, the product is a yellow transparent liquid, S% 11.2, P% 11.6, N% 2.6.

(1) Technical field

[0001] The invention relates to a preparation method of a lubricating oil additive, in particular to a preparation method of monothiophosphate amine salt, belonging to the field of lubricating oil additives. (2) Background technology

[0002] As we all know, in all kinds of heavy-duty gear transmission lubricants, the gear oil must have high-torque low-speed bearing performance and high-speed impact anti-abrasion performance, and must have excellent rust resistance, corrosion resistance, emulsification resistance and oxidation resistance. Sex, which will be solved by various additives. The extreme pressure agent that meets the high-speed impact and anti-abrasion performance is usually a sulfurized olefin, and there is no other compound that can replace it. The anti-wear agent that satisfies the high torque and low speed load-bearing performance is usually a phosphorus-containing agent. There are many types of phosphorus-containing agents. Phosphorous-con...

Examples

Embodiment 1

[0012] In a 500ml three-neck flask equipped with electric stirring, thermometer and condenser, put 134g of octadecyl primary amine, 100g of dialkyl phosphite, and react at 30°C for 4.5h; then add 130g of trisulfide, under N 2 Under gas protection, slowly raise the temperature to 170°C for 6.5 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt 352g, the product is a yellow transparent liquid, S% 15.76, P% 8.33, N% 1.65.

Embodiment 2

[0014] In the 500ml three-neck flask with electric stirring, thermometer and condenser installed, drop 134g dihexylamine, 100g dialkyl phosphite, 130g trisulfide, in N 2 Under gas protection, slowly raise the temperature to 160°C for 14 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt, the product is a yellow transparent liquid, S% 15.68, P% 7.95, N% 1.76.

Embodiment 3

[0016] In a 500ml three-neck flask equipped with electric stirring, thermometer and condenser, put 134g of octadecyl primary amine, 100g of dialkyl phosphite, and react at 30°C for 4.5h; then add 30g of sulfur powder, 2 Under gas protection, slowly raise the temperature to 170°C for 5 hours, after the reaction, cool down, N 2 Gas purging, obtained monothiophosphate amine salt 250g, the product is a yellow transparent liquid, S% 11.2, P% 11.6, N% 2.6.