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Composite calcium-based lubricating grease and preparation method thereof

A complex calcium-based, grease technology, used in lubricating compositions, petroleum industry, additives, etc., can solve problems such as surface hardening, and achieve the effect of improving surface hardening performance, improving arrangement and

Active Publication Date: 2013-03-20
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 complex calcium-based grease prepared by these methods also has the problem of surface hardening, which is also a common problem of complex calcium-based grease

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the preparation of the complex calcium-based lubricating grease that is made up of minus second-line base oil, complex calcium-based thickener and surfactant

[0031] Using naphthenic base oil (at 100°C, the kinematic viscosity is 19.98mm 2 / s) as a grease base oil. Get 23.4g of stearic acid, 85g of naphthenic base oil, lime emulsion containing 3.3g of calcium hydroxide and 2g of cetyltrimethylammonium bromide into the reactor, stir and gradually heat up to 105 Saponification at constant temperature for 4 hours. Get 12g of glacial acetic acid and 7.4g of calcium hydroxide to prepare 10% calcium acetate solution, let stand and filter. After the saponification is completed, the temperature is raised, and the prepared calcium acetate solution is slowly added at 130°C for compounding. After feeding, continue to raise the temperature, and slowly add 90g of naphthenic base oil to dilute at 170°C. After the dehydration is complete, continue to heat up to 220°C...

Embodiment 2

[0032] Embodiment 2, the preparation of the complex calcium-based lubricating grease that is made up of reducing second-line base oil, complex calcium-based thickener and surfactant

[0033] Using naphthenic base oil (at 100°C, the kinematic viscosity is 8.01mm 2 / s) as a grease base oil. Get 23.4g stearic acid, 85g cycloalkyl minus second-line base oil, lime emulsion containing 3.3g calcium hydroxide and 1g didecyl dimethyl ammonium chloride, drop in the reactor, stir and gradually heat up, rise to Saponification at constant temperature at 101°C for 4 hours. Get 12g of glacial acetic acid and 7.4g of calcium hydroxide to prepare 10% calcium acetate solution, let stand and filter. After the saponification is completed, the temperature is raised, and the prepared calcium acetate solution is slowly added at 115°C for compounding. After feeding, continue to raise the temperature, and slowly add 90g of naphthenic base oil to dilute at 162°C. After dehydration is complete, conti...

Embodiment 3

[0034]Embodiment 3, the preparation of the complex calcium-based lubricating grease that is made up of reducing second-line base oil, complex calcium-based thickener and surfactant

[0035] Using naphthenic base oil minus the second line (at 100 ℃, the kinematic viscosity is 25.46mm 2 / s) as a grease base oil. Get 23.4g of stearic acid, 85g of naphthenic base oil, lime emulsion containing 3.3g of calcium hydroxide and 2g of cetyltrimethylammonium bromide into the reactor, stir and gradually heat up to 102 Saponification at constant temperature for 4 hours. Get 12g of glacial acetic acid and 7.4g of calcium hydroxide to prepare 10% calcium acetate solution, let stand and filter. After the saponification is completed, the temperature is raised, and the prepared calcium acetate solution is slowly added at 120°C for compounding. After feeding, continue to raise the temperature, and slowly add 90g of naphthenic base oil to dilute at 164°C. After the dehydration is complete, cont...

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Abstract

The invention discloses composite calcium-based lubricating grease and a preparation method thereof. The composite calcium-based lubricating grease consists of lubricating grease base oil, a composite calcium-based thickener and a surfactant in a mass part ratio of (225-398):(40.8-72.4):(1-4), 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; the composite calcium-based thickener is a thickener consisting of calcium C12 to C24 fatty acid soap and a calcium auxiliary acid salt in a mass part ratio of (25-44.4):(15.8-28); and the calcium auxiliary acid salt is at least one of calcium C1 to C22 fatty acid salt, calcium borate and calcium phosphate. The preparation method of the invention comprises the steps of saponification, recombination and thickening and esterification. In the composite calcium-based lubricating grease, the surfactant and the soap molecules produce a synergistic effect, so the arrangement mode and base oil immobilizing capacity of the soap molecules are improved and the surface hardening performance of the composite calcium-based 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 calcium-based lubricating grease and a preparation method thereof. Background technique [0002] Grease is a plastic semi-solid product formed by dispersing a thickener in a base oil (liquid lubricant). Composite calcium-based 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] The production of complex calcium-based lubricating grease can be divided into three stages: saponification, compounding, and thickening into grease. US Patent USP4787992 adopts C 10 -C 20 Fatty acid, medium molecular acid and glacial acetic acid react with calcium hydroxide. [0004] Due to the defect of surface hardening in the complex calcium-based grease, it is inconvenient to use and store. In order to improve the performance of the complex calcium-b...

Claims

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Application Information

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Patent Type & Authority Patents(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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