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Functional urea-based lubricating grease and preparation method thereof

A technology of urea-based grease and lubricating grease, which is used in lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of poor oxidation resistance, high content of antioxidant additives, increase production cost, etc., and achieve high colloidal stability. , good anti-oxidation, the effect of reducing energy consumption

Active Publication Date: 2010-11-17
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urea-based greases prepared with naphthenic base oils have poorer oxidation resistance than urea-based greases prepared with paraffinic base oils
Therefore, in order to improve the oxidative properties of urea-based greases prepared from naphthenic oils, paraffinic base oils or aromatics of sufficient concentration are added to naphthenic oils (Wang Yumin, Wang Heng. Lubricating Materials and Lubricating Technology. Beijing: Chemical Industry Publishing Society, 2005) or synthetic oil to improve the oxidation stability of urea-based grease, such as CN101368129 has adopted a mixture of synthetic oil or mineral oil and synthetic oil, this processing method will increase production costs relatively; Another method It is to add a small amount of additives to improve the oxidation stability, such as CN1657599, adding 0.2-10% calcium compound to the polyurea grease to improve the oxidation stability of the grease, but the required antioxidant additive content is high

Method used

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  • Functional urea-based lubricating grease and preparation method thereof
  • Functional urea-based lubricating grease and preparation method thereof
  • Functional urea-based lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, the preparation of the urea base grease that is made up of grease base oil and urea base thickener

[0038] Add 4.44g of octadecylamine and 1.76g of p-toluidine to 21g of furfural refined oil of naphthenic crude oil (viscosity of 7.92cst at 100°C), and raise the temperature to 90°C to completely dissolve and disperse the organic amine to obtain the organic amine- Oil. Add 2.42g of toluene-2,4-diisocyanate (TDI) to 21g of furfural refined oil of the same naphthenic crude oil, heat and stir evenly, quickly add to the organic amine-oil, fully stir and raise the temperature to 90°C to make the organic amine Reacts completely with TDI. After the reaction was complete, 3-8 mL of water was added to remove excess TDI in the system. Raise the temperature of the system to 160-180°C for dehydration, then raise the temperature to 210-230°C for puffing, and finally grind and cool to obtain urea-based grease composed of furfural refined oil of naphthenic crude oil and...

Embodiment 2

[0039] Embodiment 2, preparation of the urea-based grease composition composed of grease base oil, urea-based thickener and antioxidant

[0040]Add 15.56g of octadecylamine and 6.18g of p-toluidine to 84g of furfural refined oil of naphthenic crude oil (viscosity of 7.92cst at 100°C), and raise the temperature to 50°C to completely dissolve the organic amine and disperse it evenly. Add 10.26g of TDI to 64g of furfural refined oil of the same naphthenic crude oil, heat and stir evenly, then quickly add to the organic amine-oil, fully stir and raise the temperature to 80°C to completely react the organic amine and TDI. After the reaction is complete, excess water is added. Raise the temperature of the system to 170°C for dehydration, then raise the temperature to 230°C for puffing, cool down to 110°C, add furfural refined oil of 20g of naphthenic crude oil containing 1.20g of 4,4'-diisooctyldiphenylamine In the system, the urea-based grease composed of furfural refined oil of n...

Embodiment 3

[0041] Embodiment 3, the preparation of the urea base grease that is made up of grease base oil, urea base thickener, antioxidant and pigment

[0042] Add 15.56g of octadecylamine and 6.18g of p-toluidine to 84g of furfural refined oil of naphthenic crude oil (viscosity at 100°C: 7.92cst), and raise the temperature to 90°C to completely dissolve the organic amine and disperse it evenly. Add 10.26g of TDI to 64g of furfural refined oil of the same naphthenic crude oil, heat and stir evenly, then quickly add to the organic amine-oil, fully stir and raise the temperature to 100°C to completely react the organic amine and TDI. After the reaction is complete, excess water is added. Raise the temperature of the system to 150°C for dehydration, then raise the temperature to 220°C for puffing, cool down to 100°C, and add 20g of naphthene containing 1.20g of 4,4'-diisooctyldiphenylamine and 1.00g of naphthol green B The furfural refined oil of base crude oil is added into the system, ...

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Abstract

The invention discloses functional urea-based lubricating grease and a preparation method thereof. According to the functional urea-based lubricating grease, furfural refined oil of naphthenic crude oil is used as lubricating grease base oil, and a substance synthesized by the reaction of organic amine mixture and diisocyanate is used as urea-based thickening agent; and the functional urea-based lubricating grease composition also comprises at least one of the following additives: antioxidant and pigment. Because the furfural refined oil of a mineral source is used as the base oil, the urea-based lubricating grease has good anti-oxidation property and high colloid stability; and meanwhile, the addition of oxidant improves the oxidation stability of the urea-based lubricating grease and the addition of a little amount of pigment endows the urea-based lubricating grease with special appearance. In the preparation method of the invention, the initial reaction temperature of the thickening agent is controlled to be between 60 and 100 DEG C, so the energy consumption is effectively reduced.

Description

technical field [0001] The invention relates to the fields of petroleum refining and chemical industry, in particular to a urea-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). This product can contain additives or fillers designed to improve certain properties. In 1954, Swaken and others discovered polyurea grease when investigating the thermal stability and oxidation stability thickener of silicone oil. Polyurea grease has been widely used in iron and steel industry, automobile industry, electrical equipment, military industry and other fields due to its excellent comprehensive performance, especially outstanding oxidation stability, thermal stability and long service life. A development direction of high-performance lubricating grease varieties in the world today. [0003] Paraffinic base oils and naphthenic base oils have th...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10M169/02C10M115/08C10N50/10C10N30/10
Inventor 陈新国纪红兵曾晖
Owner CHINA NAT OFFSHORE OIL CORP
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