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Complex lithium grease and preparation method thereof

A technology of complex lithium-based grease, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of limiting the application of lithium-complex grease

Active Publication Date: 2010-12-22
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dropping 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 lithium-complex grease

Method used

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  • Complex lithium grease and preparation method thereof
  • Complex lithium grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, the preparation of the complex lithium base lubricating grease that is made up of minus second-line base oil, complex lithium base thickener, surfactant and additive

[0038] Using naphthenic base oil (at 100°C, the kinematic viscosity is 8.01mm 2 / s) as a grease base oil. Get 33.2g of 12-hydroxystearic acid, 11.2g of sebacic acid, 3.4g of boric acid, 130g of naphthenic base oil and 2g of cetyltrimethylammonium bromide into the reactor, fully stir and slowly Raise the temperature to 100° C. and add a heated 10% aqueous solution containing 12 g of lithium hydroxide monohydrate, saponify at a constant temperature for 2 hours, and add water appropriately during the saponification process. After saponification, the temperature is raised to 140°C for dehydration and compounding. After the dehydration is complete, slowly add 80g of naphthenic base oil to dilute and continue to heat up. Gradually raise the temperature to 220°C for high-temperature refining. Sti...

Embodiment 2

[0039] Embodiment 2, the preparation of the complex lithium base lubricating grease that is made up of minus second-line base oil, complex lithium base thickener, surfactant and additive

[0040] This embodiment is an enlarged experiment to embodiment 1. Get 12-hydroxystearic acid of 166g, 56g sebacic acid, 17g boric acid, 650g naphthenic base oil (when 100 ℃, kinematic viscosity is 8.01mm 2 / s) and 10g hexadecyltrimethylammonium bromide drop into the reactor, fully stir and slowly heat up, rise to 102 ℃ and add heated 10% aqueous solution containing 60g lithium hydroxide monohydrate, Saponify at constant temperature for 2 hours, and add water appropriately during the saponification process. After saponification, the temperature is raised to 142°C for dehydration and compounding. After the dehydration is complete, slowly add 400g of naphthenic base oil to dilute and continue to heat up, and gradually raise it to 222°C for high-temperature refining, stir thoroughly for 10 min...

Embodiment 3

[0041] Embodiment 3, the preparation of the complex lithium base lubricating grease that is made up of three line base oil, complex lithium base thickener, surfactant and additive

[0042] 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 33.2g of 12-hydroxystearic acid, 11.2g of sebacic acid, 3.4g of boric acid, 130g of naphthenic base oil and 2g of cetyltrimethylammonium bromide into the reactor, fully stir and slowly Raise the temperature to 104° C. and add a heated 10% aqueous solution containing 12 g of lithium hydroxide monohydrate, saponify at constant temperature for 2 hours, and add water appropriately during the saponification process. After saponification, the temperature is raised to 144°C for dehydration and compounding. After the dehydration is complete, slowly add 80g of naphthenic base oil minus the third line to dilute and continue to heat up, gradually raising to 224°C for high-tempe...

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Abstract

The invention provides complex lithium grease and a preparation method thereof. The complex lithium grease comprises grease base oil, complex lithium thickening agents and surfactants with mass part ratio of (290-1450):(50.4-251.3):(2-10), wherein the grease base oil is at least one of vacuum second line base oil, vacuum third line base oil and vacuum fourth line base oil; the complex lithium thickening agents are formed by C12-C24 fatty acid lithium and auxiliary acid lithium with mass part ratio of (34-70):(16.4-81.3); and the auxiliary acid lithium is any two of C1-C22 fatty acid lithium, lithium borate, lithium phosphate, aromatic acid lithium, lithium naphthenate, dicarboxylic acid lithium and polybasic acid lithium. The invention also provides the preparation method of the complex lithium grease. The surfactants are added to the complex lithium grease to have synergistic effect with soap molecules of the complex lithium grease and further improve the arrangement of the soap molecules and the capability of curing the base oil, thus increasing the dropping point of the grease.

Description

technical field [0001] The invention relates to the fields of petroleum refining and chemical industry, in particular to a lithium composite grease and a preparation method thereof. Background technique [0002] Lithium complex grease has received more and more attention due to its high dropping point and good high temperature performance. Its research began in the 1960s. In 1962, the first lithium complex grease product in the United States passed the field test. . Since the 1970s, complex lithium-based greases have developed rapidly. The complex lithium-based greases containing dibasic acid, boric acid, and salicylic acid are called "new generation" lithium-based greases. In the United States, complex lithium-based greases are used as industrial multi-effect greases, automotive It is widely used as multi-effect grease and anti-friction bearing grease. Our country started the research work of lithium complex grease in the 1970s, and successfully applied it in industry. No...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M133/06C10M133/54C10M177/00C10N50/10C10N30/10C10N30/12
Inventor 陈新国刘洪涛
Owner CHINA NAT OFFSHORE OIL CORP
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