Compound calcium sulfonate-calcium naphthenate zirconium-based lubricating grease and preparation method thereof

Abstract

The invention discloses compound calcium sulfonate-calcium naphthenate zirconium-based lubricating grease. The lubricating grease comprises the following components in percentage by weight: 10-70 percent of non-newton calcium sulfonate-calcium naphthenate, 1-10 percent of zirconium salt of higher fatty acid, 1-15 percent of zirconium salt of aromatic acid and 10-80 percent of base oil, and optionally comprises 1-15 percent of zirconium salt of micromolecular inorganic acid and/or lower fatty acid, wherein the zirconium salt of higher fatty acid, the zirconium salt of aromatic acid and the zirconium salt of micromolecular inorganic acid and/or lower fatty acid are respectively prepared by reactions of higher fatty acid, aromatic acid, and micromolecular inorganic acid and/or lower fatty acid with a component A; and the component A is at least one of oxide of zirconium, hydroxide of zirconium and zirconium alkoxide. The invention further discloses a method for preparing the lubricating grease and the lubricating grease prepared by the method. The lubricating grease has excellent mechanical stability, excellent water resistance, excellent adhesion, salt mist resistance, colloid stability, extreme pressure antiwear property and the like.

Description

technical field [0001] The invention relates to lubricating grease, in particular to a composite calcium sulfonate-calcium naphthenate zirconium-based lubricating grease and a preparation method thereof. Background technique [0002] Calcium sulfonate has been used as a detergent and antirust agent for lubricating oil for decades, and is widely used as an additive for internal combustion engine lubricating oil. Its technical development is mainly to make it highly alkaline, that is, to use calcium carbonate with a Active calcium alkylbenzene sulfonate or calcium alkyl carboxylate is dispersed in diluent oil to form a colloidal dispersion system. High base value calcium sulfonate can be divided into petroleum calcium sulfonate and synthetic calcium sulfonate according to different production methods. Calcium petroleum sulfonate is made with oleum or SO 3 Petroleum sulfonic acid, a by-product of the production of white oil from sulfonated mineral lubricating oil, is combined...

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Problems solved by technology

[0004] Using calcium sulfonate with high base value as raw material to produce lubricating grease, because of its excellent high and low temperature performance, mechanical stability, colloidal stability, oxidation stability, water resistance, corrosion resistance and anti-rust and anti-wear properties, it has been put into the market since then. Since then, it has attracted widespread attention in the grease industry at home and abroad. However, although the high-basic value calcium sulfonate-based grease has excellent comprehensive properties, the high price of its raw material high-basic value calcium sulfonate and its own complicated preparation process As a result, it has not been promoted rapidly. At the same time, as people's requirements for environmental protection are getting higher and higher, the pollution of the environment by the sulfonation process that must be passed through the production process of high-basic calcium sulfonate is also increasingly concerned by people.

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