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Anhydrous albany grease and preparation method thereof

A calcium-based grease and base oil technology, applied in the field of anhydrous calcium-based grease and its preparation, grease and its preparation, can solve the problem that the requirements for high temperature use cannot be met, the product performance cannot be known, and the preparation requires a lot of raw materials. and other problems, to achieve the effect of good water erosion resistance, good extreme pressure and anti-wear performance, and enhanced extreme pressure and anti-wear performance.

Active Publication Date: 2012-10-31
JIANGSU LOPALTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the publication number is CN 102021066A, which discloses a preparation method of synthetic calcium-based lubricating grease, which requires many raw materials, complicated process, relatively high cost, and no way to know the performance of the product.
Both US 2618599 and US 2607734 provide a method for anhydrous calcium-based grease, but the cost is high, the performance of the prepared product is unstable, and the product will have a large granular structure if it is not sufficiently ground
In addition, US2618599 uses castor oil, and the prepared product contains unsaturated acid, which makes the oxidation stability of the product poor
The process control points of the anhydrous calcium-based lubricating grease preparation method reported by US2915467, US2868729 and US2862884 are more, and the product prepared needs to be improved on colloidal stability and mechanical stability, and the product prepared by US2862884 has a low dropping point, which cannot meet High temperature requirements

Method used

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  • Anhydrous albany grease and preparation method thereof
  • Anhydrous albany grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment prepares anhydrous calcium base lubricating grease according to the following method:

[0031] Step 1. Paraffin base oil 500SN (kinematic viscosity at 40°C 115mm 2 / s) 1000kg and 36kg of calcium hydroxide were added to the open reaction kettle and stirred and mixed. After slowly heating up to 65°C, 54.8kg of stearic acid, 219.2kg of 12-hydroxystearic acid and 80kg of water were added in sequence, and the temperature was continued to rise to 85°C. saponification reaction;

[0032] Step 2. After the saponification reaction is completed, the temperature is raised to 110°C. After heat preservation and dehydration, divide into 2 times and add 500SN 900kg each time for thickening;

[0033] Step 3. Raise the temperature of the thickened reactant to 140°C for refining, transfer the reactant to an intermediate kettle, and add the remaining 500SN 700kg for cooling;

[0034] Step 4. When the reactant in step 3 is cooled to 80°C, add 15kg of di-tert-butyl p...

Embodiment 2

[0036] The present embodiment prepares anhydrous calcium base lubricating grease according to the following method:

[0037] Step 1, polyalpha-olefin oil PAO-12 (the kinematic viscosity of 40 ℃ 95mm 2 / s) 900kg and 38.1kg of calcium hydroxide are added to the open reaction kettle and stirred and mixed. After slowly heating up to 70°C, add 40.2kg of stearic acid, 267.7kg of 12-hydroxystearic acid and 95kg of water in sequence, and continue to heat up to 80°C Carry out saponification reaction;

[0038] Step 2. After the saponification reaction is completed, the temperature is raised to 105°C. After heat preservation and dehydration, add 1000kg of PAO-12 in 3 times for thickening;

[0039] Step 3. Raise the temperature of the thickened reactant to 135°C for refining, transfer the reactant to an intermediate kettle, and add the remaining 700kg of PAO-12 for cooling;

[0040] Step 4. When the reactant in step 3 is cooled to 85°C, add 9kg of phenyl-α-naphthylamine, 15kg of thiadia...

Embodiment 3

[0042] This embodiment prepares anhydrous calcium-based lubricating grease according to the following method (the kinematic viscosity at 40°C after mixing the two base oils selected in this embodiment is 245mm 2 / s):

[0043] Step 1. Add naphthenic oil YX-100 (the kinematic viscosity at 40°C is 97mm 2 / s) 950kg and 40.5kg of calcium hydroxide were added to the open reaction kettle and stirred and mixed. After slowly heating up to 65°C, 29.6kg of stearic acid, 295.9kg of 12-hydroxystearic acid and 120kg of water were added in sequence, and the temperature was continued to rise to 85°C Carry out saponification reaction;

[0044] Step 2. After the saponification reaction is completed, the temperature is raised to 110°C. After heat preservation and dehydration, add paraffin base oil 150BS in an average amount each time (the kinematic viscosity at 40°C is 460mm 2 / s) 1100kg for thickening;

[0045] Step 3, heat up the thickened reactant to 145°C for refining, transfer the reacta...

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Abstract

The invention belongs to the technical field of the chemical industry, and relates to grease and a preparation method thereof, in particular to anhydrous albany grease and the preparation method thereof. The anhydrous albany grease and the preparation method comprises the following components by weight: 82-90% of base oil, 1-4% of calcium hydroxide, 6-15% of fatty acid, 0.3-1% of antioxygen, 0.5-1.5% of rust inhibitor, and 0.5-3% of extreme pressure antiwear additive. The anhydrous albany grease and the preparation method have the benefits as follows: the grease is simple in preparation process and easy to control; and the prepared product has better water erosion resistance, favorable metal adhesivity and extreme pressure abrasion resistance, and can provide outstanding lubrication and abrasion resistance protection for wheel bearings and chassis.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to an anhydrous calcium-based lubricating grease and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] Grease is a kind of grease-like semi-solid, which is used in the friction part of machinery to lubricate and seal, and can also be used on metal surfaces to fill gaps and prevent rust. Ordinary calcium-based lubricating grease uses water as a stabilizer, so it has poor heat resistance and loses consistency when the temperature exceeds 100°C, resulting in its use temperature below 60°C. When the operating temperature reaches 100°C, the structure of the calcium-based grease is destroyed due to the evaporation of the water contained in it, and the function of the grease is lost. Therefore, its application field is mainly the bearing lubrication of agricultural vehicles such as tractors, water pump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M177/00C10N50/10C10N30/06
Inventor 石俊峰
Owner JIANGSU LOPALTECH
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