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Ash-free antirust additive for industrial lubricant and preparation method thereof

A technology of ashless antirust agent and lubricating oil, which is applied in the preparation of additives, organic compounds, petroleum industry, etc. It can solve the problems of high acid value, antirust effect not as good as alkenyl succinic acid, corrosion of metal parts, etc. , to achieve the effect of low acid value, good oil solubility, anti-rust performance and good anti-emulsification performance

Inactive Publication Date: 2011-04-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an anti-rust agent, alkenyl succinic acid has excellent anti-rust and anti-emulsification properties, and has been widely used in industrial lubricating oils, but its acid value is large and its acid neutralization ability is poor, which easily causes oil acid value High, potentially corrosive to metal parts
In order to solve this problem, alkenyl succinic acid half ester rust inhibitors with smaller acid value have been developed at home and abroad. Although the acid value has decreased, its antirust effect is not as good as alkenyl succinic acid, and it is still Failed to solve the problem of high acid value
However, imidazoline anti-rust additives generally have disadvantages such as easy emulsification and high price, so they are limited to use in anti-rust oil and anti-rust grease

Method used

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  • Ash-free antirust additive for industrial lubricant and preparation method thereof
  • Ash-free antirust additive for industrial lubricant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 284.5 g (1 mol) of stearic acid and add it to a 1000 ml three-neck bottle, and then add 300-500 ml of 200 # Solvent oil (Lanzhou Oil Refinery, d 20 =0.792 g / cm3, in accordance with GB1884 specifications), stir and heat to reflux state, and then slowly add 77.3 g (1 mol) of dimethanolamine dropwise for esterification reaction until the theoretical amount of water produced by the reaction is removed. After the reaction, under the condition of room temperature-160℃ / 0.029-0.1MPa, 200 # Solvent oil, the esterification reaction product RHY702-1 of stearic acid and dimethanolamine was prepared, the appearance was light red liquid, and the yield was 92%.

example 2

[0020] Weigh 281 grams (about 1 mole) of oleic acid into a 1000 ml three-neck bottle, and then add about 500 ml of 120 # Solvent oil (Lanzhou Oil Refinery, d 20 =0.694 g / cm3, in line with GB1884 specifications), stir and heat to reflux state, and then add 119.1 g (1.0 mol) of triethanolamine in batches for esterification reaction until the theoretical amount of water produced by the reaction is removed. After the reaction, under the condition of room temperature-120℃ / 0.029-0.1MPa, 120 # Solvent oil, the esterification reaction product RHY702-2 of oleic acid and triethanolamine is prepared, and the appearance is yellow viscous liquid, and the yield is 86%.

example 3

[0022] Weigh 200.4 g (about 1 mol) of lauric acid into a 1000 ml three-neck bottle, and then add about 500 ml of 120 # Solvent oil (Lanzhou Oil Refinery, d 20 =0.694 g / cm3, in line with GB1884 specifications), stir and heat up to reflux, and then slowly add 191.6 g (1 mol) of tripropanolamine dropwise for esterification reaction until the theoretical amount of water produced by the reaction is removed. After the reaction, under the condition of room temperature-120℃ / 0.029-0.1MPa, 120 # Solvent oil, the esterification reaction product RHY702-3 of lauric acid and tripropanolamine was prepared, the appearance was reddish brown liquid, and the yield was 91%.

[0023] The main properties of the three ester rust inhibitors are shown in Table 1.

[0024] Table 1

[0025] Instance

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Abstract

The invention discloses an aliphatic ester type ash-free antirust additive, which is an aliphatic ester compound prepared from saturated or unsaturated fatty acid and a polyhydroxy organic amine compound through an esterification reaction. The method for preparing the antirust additive comprises the following steps of: mixing 1 to 2 moles of saturated or unsaturated fatty acid with 1 mole of polyhydroxy organic amine compound, adding a proper amount of No.120 or No.200 solvent oil for the esterification reaction at the temperature of between 90 and 160 DEG C until a theoretical amount of water is dehydrated; and distilling to remove the solvent oil. The ash-free antirust additive has good dissolubility, antirust property and emulsion resistance, simultaneously has a lower acid value and a certain base value, and has wide application in the industrial lubricant.

Description

Technical field: [0001] The invention relates to an ashless anti-rust additive which can be used in industrial lubricating oil, in particular to an anti-rust agent of the esterification product of fatty acid and polyhydroxy organic amine compound. technical background: [0002] At present, the most widely used anti-rust agent in China is alkaline sulfonate. This anti-rust agent has significant anti-rust effect, and also has good water displacement and acid neutralization. However, this type of anti-rust additive is used in industry The lubricating oil will have a strong antagonism with the extreme pressure antiwear agent, which reduces the performance of the extreme pressure antiwear agent. Furthermore, sulfonate rust inhibitors contain metal components such as calcium and barium, which will produce a large amount of sludge and deposits after use, so their use is increasingly restricted. [0003] With the continuous upgrading of lubricant products, people's demand for low-ash and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M133/06C07C219/08C07C213/06C10N40/08C10N40/02C10N40/04C10N30/12
Inventor 李久盛张立鲁倩张梅
Owner PETROCHINA CO LTD
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