Food grade lubricating grease and its preparation method and application

Abstract

The invention relates to food-grade lubricating grease as well as a preparation method and application thereof. The food-grade lubricating grease comprises the following components by weight percent: 70-80% of base oil, 6-15% of thickening agent and 10-20% of antiwear agent. The preparation method comprises the following steps: adding fatty acid, aromatic acid and organic aluminum into the base oil in a proportion, mixing and heating to 60-100 DEG C, and carrying out a recombination reaction for 1-2 hours; further heating the combined material to 100-140 DEG C, adding tap water with a certain proportion and then maintaining the constant temperature for 1-2 hours, wherein water equivalent is 1-3 times that of organic aluminum; further heating the combined material to 150-180 DEG C and the nmaintaining the constant temperature for 0.5-1 hour; then adding quenching oil and evenly mixing, wherein the amount of quenching oil is about 30%-40% of that of base oil; and further cooling the material to the temperature below 140 DGE C, and adding the antiwear agent and then evenly mixing, so as to obtain the required product. In the invention, a one-step method is adopted for direct recombination reaction, thus process is simple, energy consumption is reduced, production cost is reduced, and the quality of the product produced by the process is relatively stable.

Description

technical field [0001] The invention relates to food-grade lubricating grease, more precisely, lubricating grease applied to drinking water pipelines and valves and a preparation method thereof, which is safe for drinking water and has good water resistance, sealing, and high and low temperature performance. Background technique [0002] At present, most construction units of drinking water transmission and distribution projects in China still use soapy water, vegetable oil or vaseline as lubricants in the installation process of pipelines and valves. Their disadvantages are: 1. The viscosity of soapy water and vegetable oil is extremely small, the lubricating film is very thin, and it is easy to lose. Wear of rubber sealing rings, especially food-grade rubber sealing rings; soapy water and vegetable oil are easily soluble in water after installation of pipes and valves, and are washed away by water, resulting in increased rubber wear and reduced sealing performance; soapy w...

AI Technical Summary

Problems solved by technology

The use of soapy water, vegetable oil or petroleum jelly for the lubrication and sealing of drinking water distribution pipelines and valve assemblies has fallen far behind and cannot meet the requirements of the "Hygienic Standards for Drinking Water Quality"

[0004] Through literature and patent inquiries, no food-grade grease literature and patent reports have been found at home and abroad for the lubrication and sealing of drinking water pipes and valves

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