Lubricating oil detergent dispersant and preparation method thereof

A technology for cleaning and dispersing agents and lubricating oils, which is applied in the preparation of carboxylate salts, lubricating compositions, additives, etc., can solve the problems of not providing acid neutralization ability, poor dispersibility, and increasing costs, and achieve excellent high-temperature detergency, The effect of excellent low-temperature sludge dispersibility

Inactive Publication Date: 2017-01-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increasingly stringent environmental regulations limit the use of sulfonate products, but the poor dispersibility of alkylphenates and alkyl salicylates makes the development of high-grade oils a challenge
[0004] The way to solve this problem is to increase the amount of dispersant to compensate for the poor dispersibility of the detergent, and the dispersant does not provide acid neutralization ability. reduce, which increases the cost

Method used

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  • Lubricating oil detergent dispersant and preparation method thereof
  • Lubricating oil detergent dispersant and preparation method thereof
  • Lubricating oil detergent dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1: In a 500mL airtight container equipped with a stirrer, thermometer, heating mantle and vent pipe, add 50.0g of solvent straight-run gasoline (C4-C12 alkane), 20.0g of accelerator methanol, and 6.0g of hydrogen peroxide Calcium, stir and heat up to 50°C;

[0038] S2: Continue to add 50.0 g of diluent vegetable oil, then add 100.0 g of tetradecyl 2-hydroxy-3-naphthoic acid, seal the reaction vessel, and carry out the neutralization reaction for 60 minutes;

[0039] S3: Introduce CO within 60 minutes after the neutralization reaction 2 2.0g of gas. After the reaction, the temperature was raised to 90°C and kept for 30 minutes, and the residue was removed by filtration. Finally, the solvent was evaporated to obtain the product.

[0040] The base value of the product is 54.6mgKOH / g, and the calcium content is 1.99%.

Embodiment 2

[0042] S1: In a 500mL airtight container equipped with a stirrer, a thermometer, a heating mantle and a vent pipe, add 175.0g of solvent n-octane, 110.0g of accelerator ethylene glycol, and 38.0g of calcium hydroxide in turn, and stir to heat up to 50°C;

[0043] S2: Continue to add 100.0 g of diluent base oil HVI 150, then add 100.0 g of tetradecyl 2-hydroxy-3-naphthoic acid, seal the reaction vessel, and carry out neutralization reaction for 60 minutes;

[0044] S3: Introduce CO within 120min after the neutralization reaction 2 Gas 21.0g. After the reaction, the temperature was raised to 90°C and kept for 30 minutes, and the residue was removed by filtration. Finally, the solvent was evaporated to obtain the product.

[0045] The base value of the product is 210mgKOH / g, and the calcium content is 7.7%.

Embodiment 3

[0047] S1: Add 300.0g of solvent cyclohexane, 200.0g of accelerator methanol, and 70.0g of calcium hydroxide in sequence in a 500mL airtight container equipped with a stirrer, thermometer, heating mantle and vent pipe, and stir to raise the temperature to 50°C ;

[0048] S2: Continue to add 100.0 g of eicosyl 2-hydroxy-3-naphthoic acid, seal the reaction vessel, and carry out the neutralization reaction for 60 minutes;

[0049] S3: Introduce CO within 180min after the neutralization reaction 2 40.0g of gas. After the reaction, the temperature was raised to 90°C and kept for 30 minutes, and the residue was removed by filtration. Finally, the solvent was evaporated to obtain the product.

[0050] The base value of the product is 301.1mgKOH / g, and the calcium content is 10.9%.

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Abstract

The present invention discloses a lubricating oil detergent dispersant and a preparation method thereof. The dispersant is alkyl-2-hydroxy-3-naphthoate calcium. A structural formula of the dispersant is shown in the description wherein R is an alkyl group having 10-30 carbon atoms. The preparation method comprises the following steps: long-chain alkyl-2-hydroxy-3-naphthoic acids are used as a raw material and subjected to a carbonation reaction under an action of Ca (OH)2 and with an inlet of CO2 to prepare the alkyl-2-hydroxy-3-naphthoate calcium products having alkaline reserves. The prepared dispersant has the same excellent high-temperature detergency as the existing commercial products, and is superior in low-temperature dispersibility compared with the existing products.

Description

technical field [0001] The invention relates to a lubricating oil detergent and dispersant and a preparation method thereof. Background technique [0002] During the use of the engine, carbon deposits, sludge and paint films will be generated. The detergent is to disperse the carbon deposits and sludge generated in the engine oil through solubilization, dispersion and acid neutralization, so as not to affect the normal operation of the engine. [0003] Among the known detergents, alkylphenates have good oxidation resistance and corrosion resistance, sulfonates have good low-temperature dispersion performance, and alkyl salicylates have excellent high-temperature detergent performance, but General dispersion performance. In the development of oil products, in order to complement each other, the three are often used in combination. The increasingly stringent environmental regulations restrict the use of sulfonate products, but the poor dispersibility of alkylphenates and al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M129/54C07C65/11C07C51/41C10N30/04
Inventor 梁依经杨鹏管飞伏喜胜
Owner PETROCHINA CO LTD
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