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High-performance calcium sulfonate complex grease and preparation method thereof

A technology of composite calcium sulfonate and high-basic calcium sulfonate, applied in the chemical field, can solve the problems of low thickening ability of calcium sulfonate solution, low sintering load of lubricating grease, poor high temperature performance, etc., and solve the problem of surface hardening , long service life, complete conversion effect

Active Publication Date: 2012-08-15
JIANGSU LOPALTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1950s, foreign countries began to use calcium sulfonate as a thickener to prepare lubricating grease, but due to its low thickening ability, the thickening ability of oil-soluble Newtonian calcium sulfonate solution is very small, so it has not been effectively promoted.
If the content of calcium carbonate is insufficient or the calcium carbonate in it is not completely converted from the amorphous form to the calcite crystal form, the grease will be soft, the high temperature performance will be poor, and the sintering load of the grease will be low

Method used

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  • High-performance calcium sulfonate complex grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the raw materials are prepared in the following steps to prepare composite calcium sulfonate base grease:

[0038] Step 1. Mix 32.08% of 150BS base oil, 38.25% of 380TBN calcium petroleum sulfonate and 10.5% calcium carbonate in an open reactor with a steam jacket and double-moving paddles, and heat to 75°C;

[0039] Step 2. Add 2.58% isopropanol, 3.52% water and 1.25% cetylbenzenesulfonic acid to the above mixture, heat to 102°C, and keep stirring at this temperature for 45min until form a gel;

[0040] Step 3. When forming a gel, add 2.5% calcium hydroxide and heat up to 115°C, then add 1.85% 12-hydroxystearic acid at a rate of 4kg / min, stir for 15min, and then add 12-hydroxystearic acid at a rate of 3kg / min Add 2.15% sulfuric acid, continue to stir and react for 30min;

[0041]Step 4. Raise the temperature of the reaction system to 126°C, add 3.12% polyisobutene, continue to raise the temperature of the reactant system to 175°C, and refine a...

Embodiment 2

[0045] In this embodiment, the raw materials are prepared in the following steps to prepare composite calcium sulfonate base grease:

[0046] Step 1. Mix 30.71% intermediate base oil, 41.44% 400TBN synthetic calcium sulfonate and 7.89% calcium carbonate in an open reactor with steam jacket and double-moving blades, and heat to 66°C;

[0047] Step 2: Add 3.16% isopropanol, 4.74% water and 1.3% dodecylbenzenesulfonic acid to the above mixture, heat to 107°C, and keep stirring at this temperature for 60min until form a gel;

[0048] Step 3. When forming a gel, add 2.29% calcium hydroxide, and raise the temperature to 116°C, add 0.31% glacial acetic acid to the reaction system, and react for 20 minutes, then add 2.96% 12-hydroxyl at 6kg / min Stearic acid, after stirring and reacting for 20min, add 1.97% phosphoric acid at a speed of 2kg / min, continue stirring and reacting for 20min;

[0049] Step 4. Raise the temperature of the reaction system to 130°C, add 1.26% polystyrene-isob...

Embodiment 3

[0053] In this embodiment, the raw materials are prepared in the following steps to prepare composite calcium sulfonate base grease:

[0054] Step 1. Mix 31.46% polyalphaolefin, 32.86% 400TBN synthetic calcium sulfonate and 12.28% calcium carbonate in an open reactor with a steam jacket and double-moving paddles, and heat to 85°C;

[0055] Step 2. Add 3.43% isopropanol, 5.21% water and 1.42% octadecylbenzenesulfonic acid to the above mixture, heat to 110°C, and keep stirring at this temperature for 90min until form a gel;

[0056] Step 3. When forming a gel, add 1.98% calcium hydroxide, and raise the temperature to 120°C, add 0.18% glacial acetic acid to the reaction system, and react for 25 minutes, then add 3.32% 12 at a speed of 8kg / min -Hydroxystearic acid, after stirring and reacting for 20min, add 2.13% nitric acid at a speed of 5kg / min, continue stirring and reacting for 30min;

[0057] Step 4. Raise the temperature of the reaction system to 145°C, add 2.48% polymethy...

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Abstract

The invention relates to grease and a preparation method thereof, in particular to calcium sulfonate complex grease and a preparation method thereof, which belong to the field of chemical technology. A formula of the calcium sulfonate complex grease includes, in weight percentage, 23.5-35.5% of base oil, 32.0-45.4% of high alkalinity calcium sulfonate, 5-15% of calcium carbonate, 1.1-1.5% of alkyl benzene sulfonic acid, 2.5-3.5% of isopropanol, 3-6% of water, 1.9-2.7% of calcium hydroxide, 2-4% of 12-hydroxystearic acid, 1.75-2.25% of inorganic acid, 0.5-3.5% of thickening agent, and 0.1-5% of antioxidant. The calcium sulfonate complex grease has the advantages of high dropping point, fine rust and corrosion resistance, extreme pressure and wear resistance, fine mechanical stability, no hardening in long-term storage and long service life.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to a calcium sulfonate-based lubricating grease and a preparation method thereof, belonging to the technical field of chemistry. Background technique [0002] Composite calcium sulfonate-based grease is a kind of high-temperature multi-effect grease, which has excellent extreme pressure and anti-wear properties, water resistance, salt spray resistance, corrosion resistance and rust resistance without adding any additives. It also has excellent high and low temperature performance, mechanical stability, colloid stability and oxidation stability, and is called "a new generation of high-efficiency grease". In the 1950s, calcium sulfonate was used as a thickening agent to prepare lubricating grease abroad, but due to its low thickening ability and oil-soluble Newtonian calcium sulfonate solution thickening ability is very small, it has not been effectively promote...

Claims

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Application Information

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IPC IPC(8): C10M123/02C10M177/00
Inventor 石俊峰
Owner JIANGSU LOPALTECH
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