Composite lithium-calcium-based lubricating grease and preparation method

A technology of calcium-based grease and lithium complex, which can be used in lubricating compositions, petroleum industry, additives, etc., and can solve the problems of limiting the application of lithium-calcium complex grease

Inactive Publication Date: 2010-12-22
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The drop point of the two-component or three-component lithium complex grease prepared by the existing technology is generally lower than 330°C, which limits the application of the complex lithium-calcium grease

Method used

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  • Composite lithium-calcium-based lubricating grease and preparation method
  • Composite lithium-calcium-based lubricating grease and preparation method
  • Composite lithium-calcium-based lubricating grease and preparation method

Examples

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Effect test

Embodiment 1

[0038] Embodiment 1, the preparation of the complex lithium-calcium base lubricating grease that is made up of reducing second-line base oil, complex lithium-calcium base thickener, surfactant and additive

[0039] Using naphthenic base oil (at 100°C, the kinematic viscosity is 8.01mm 2 / s) as a grease base oil. Get the 12-hydroxystearic acid of 50g, 200g naphthenic base oil, the lime emulsion that contains 2.2g calcium hydroxide and 2g cetyltrimethylammonium bromide drop in reactor, stir and gradually heat up, Rise to 95°C for 2 hours at a constant temperature. At this time, part of the 12-hydroxystearic acid and calcium hydroxide undergoes a saponification reaction. Then 12.5g of sebacic acid and 2.5g of boric acid were put into the reaction kettle, and after fully stirring for 10 minutes, the temperature was raised to 120°C, and the heated 10% aqueous solution containing 13.5g of lithium hydroxide monohydrate was added, and then saponified for 2 hours. Water can be added...

Embodiment 2

[0040] Embodiment 2, the preparation of the complex lithium-calcium base lubricating grease that is made up of three-line base oil, complex lithium-calcium base thickener, surfactant and additive

[0041] Using naphthenic base oil minus the third line (at 100°C, the kinematic viscosity is 19.98mm 2 / s) as a grease base oil. Get the 12-hydroxystearic acid of 50g, 200g naphthenic base oil minus three lines, the lime emulsion that contains 2.2g calcium hydroxide and 2g cetyltrimethylammonium bromide drop in reactor, stir and gradually heat up, Rising to 98°C for 1 hour constant temperature reaction. At this time, part of the 12-hydroxystearic acid and calcium hydroxide undergoes a saponification reaction. Then 12.5g of sebacic acid and 2.5g of boric acid were put into the reaction kettle, and after fully stirring for 10 minutes, the temperature was raised to 123°C, and the heated 10% aqueous solution containing 13.5g of lithium hydroxide monohydrate was added, and then saponifi...

Embodiment 3

[0042] Embodiment 3, the preparation of the complex lithium-calcium base lubricating grease that is made up of minus four line base oil, complex lithium-calcium base thickener, surfactant and additive

[0043] Use naphthenic base oil minus four lines (at 100°C, the kinematic viscosity is 25.46mm 2 / s) as a grease base oil. Get 50g of 12-hydroxystearic acid, 250g naphthenic base oil and contain 2.2g calcium hydroxide, lime emulsion and 2g ditetradecyl dimethyl ammonium bromide and drop into the reactor, stir and gradually The temperature was raised to 101° C. for a constant temperature reaction for 2 hours. Then 12.5g of azelaic acid and 2.5g of boric acid were put into the reaction kettle, and after fully stirring for 10 minutes, the temperature was raised to 125°C, and a heated 10% aqueous solution containing 13.5g of lithium hydroxide monohydrate was added, and then saponified for 3 hours. Water can be added appropriately. After saponification, the temperature is raised t...

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Abstract

The invention provides composite lithium-calcium-based lubricating grease and a preparation method. The composite lithium-calcium-based lubricating grease consists of lubricating grease base oil, a composite lithium-calcium-based thickener and a surfactant in a mass part ratio of (449-1,722): (69.6-304.8): (2-10), wherein the lubricating grease base oil is at least one of vacuum cut 2 base oil, vacuum cut 3 base oil and vacuum cut 4 base oil; and the composite lithium-calcium-based thickener is a composite thickener consisting of calcium C12 to C24 fatty acid salt, a lithium C2 to C12 fatty diacid salt and lithium borate in mass part ratio of (53.2-238.6):(13.2-53.2):(3.2-13). The invention also provides a method for preparing the composite lithium-calcium-based lubricating grease. The surfactant is added into the composite lithium-calcium-based lubricating grease to produce a synergistic effect with soap molecules for improving the arrangement mode base oil immobilizing capacity of the soap molecules, and thus the dropping point of the lubricating grease is improved.

Description

technical field [0001] The invention relates to the fields of petroleum refining and chemical industry, in particular to a composite lithium-calcium-based lubricating grease and a preparation method thereof. Background technique [0002] Different metals such as calcium, lithium, barium, lead, and aluminum endow lubricating greases with different properties. For example, calcium-based grease has good water resistance, lithium-based grease has good friction reduction, good colloidal stability, and good mechanical stability. Fat has good oxidation stability and good water resistance. Mixed metal soap base grease combines the characteristics of single metal soap base grease. Lithium-calcium complex grease has good mechanical stability and colloidal stability, and is resistant to high temperature and high pressure, so it is widely used in various fields. [0003] Chinese patent CN86103103A reports the preparation process of lithium-calcium-based lubricating grease. The lubrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M133/06C10M133/54C10M177/00C10N50/10
Inventor 陈新国刘洪涛
Owner CHINA NAT OFFSHORE OIL CORP
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