Method for preparing nanometer sulfo antimony acid antimony

Abstract

The invention discloses a method for preparing nanometer sulfo antimony acid antimony via the uniform precipitation method, comprising the following steps: employing leukonin and antimony white as the raw materials; utilizing sodium sulfide to leach leukonin, thus to obtain a pentavalent antimony solution; employing the sodium chloride solution of the hydrochloric acid to leach antimony white forpreparing a trivalent antimony solution; slowly adding the two solutions into a buffer system containing a surfactant; and employing supersonic wave stirring for homogeneous precipitation. The generated precipitation, after receiving the treatment of aging, dispersing, rinsing, and drying in a tartrate solution, is turned into the nanometer sulfo antimony acid antimony product. The method features simple process and high yield, causes no pollution to the environment, and is easy to operate and put into industrial production. The color of the produced product is umber, with granularity being 93nm, and is compatible with the grease. The produced nanometer sulfo antimony acid antimony is an excellent extreme pressure-antiwear additive and solid lubricant of the lubrication grease. As an additive, the performance index of the product far exceeds the national standards about the extreme pressure lubrication grease.

Description

technical field [0001] The invention relates to the field of fine chemical industry, and is suitable for being used as an extreme pressure antiwear additive and a solid lubricant for lubricating grease, in particular to a preparation method of nano antimony thioantimonate. technical background [0002] Extreme pressure anti-wear additive is the main additive of lubricating grease. The purpose and function of this kind of additive is to form a secondary compound protective film on the mechanical friction surface to prevent wear and tear, and to prevent burning or burning under extreme pressure lubrication. , thereby improving the lubricating performance. People add various types of additives to the existing lubricating greases, which have achieved great success in improving the performance of the greases. Antimony thioantimonate is a kind of extreme pressure antiwear additive and solid lubricant for lubricating grease with excellent performance. In the 1980s, it was first s...

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Problems solved by technology

Publication number is that the patent application of 101468814A adopts the third method to prepare antimony thioantimonate is an early research before the present invention is carried out, and the contriver finds that the product particle obtained by this method is coarse, and particle size distribution is inhomogeneous (average particle size is 500 nanometers, particle size standard deviation of 30%), low lubricity, and unable to suppress Na 3 Sb 4 9H 2 The decomposition of O and the hydrolysis of antimony trichloride lead to system instability and product quality decline

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