Food grade lubricating grease and its preparation method and application

A food-grade grease technology, applied in the field of food-grade grease, can solve the problem of food-grade grease literature and patent reports that cannot meet the hygienic water quality standards, backward lubrication and sealing, and have not found drinking water pipelines and valve lubrication and sealing and other problems, to achieve superior high and low temperature performance, reduce maintenance costs, and not easy to deteriorate

Active Publication Date: 2011-12-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Food grade lubricating grease and its preparation method and application
  • Food grade lubricating grease and its preparation method and application
  • Food grade lubricating grease and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Add 110 grams of stearic acid and 61 grams of benzoic acid to 1560 grams and the viscosity is 100mm 2 / s food-grade mineral oil, heat to 60°C, add 86 grams of aluminum isopropoxide, rise to 80°C, react for 1 hour, continue to heat to 100°C, add 12.5 grams of tap water, keep the temperature for 1 hour, and continue to heat up the material To 150 DEG C, keep the temperature for 30 minutes, add 700 grams of food-grade mineral oil for rapid cooling, when the temperature drops below 100 DEG C, add 400 grams of polytetrafluoroethylene micropowder, and carry out post-processing after stirring to obtain the finished product fat. The lubricating grease performance that process formula of the present invention makes is listed in the following table:

[0028]

[0029] It can be seen from the above table that the rubber compatibility, high and low temperature performance and water resistance performance of the lubricating grease of the present invention are all very good.

[00...

example 2

[0039] Add 104 grams of stearic acid and 76 grams of benzoic acid to 580 grams of viscosity to be 1000mm 2 / s food-grade synthetic oil, heat to 80°C, add 74.6 grams of aluminum isopropoxide, rise to 90°C, react for 2 hours, continue to heat to 110°C, add 5.7 grams of tap water, keep the temperature for 1 hour, and continue to heat up the material To 180 DEG C, keep the temperature for 40 minutes, add 320 grams of food-grade synthetic oil for rapid cooling, when the temperature drops below 130 DEG C, add 120 grams of polytetrafluoroethylene micropowder, and carry out aftertreatment after stirring to obtain the finished product fat. The lubricating grease performance that process formula of the present invention makes is listed in the following table:

[0040]

[0041] It can be seen from the above table that the rubber compatibility, high and low temperature performance and water resistance performance of the lubricating grease of the present invention are all very good.

...

example 3

[0051] Add 284 grams of stearic acid and 122 grams of benzoic acid to 1710 grams and the viscosity is 10mm 2 / s food-grade mineral oil, heat to 100°C, add 245 grams of aluminum isopropoxide, rise to 100°C, react for 1 hour, continue heating to 140°C, add 65 grams of tap water, keep the temperature for 2 hours, and continue to heat up the material To 170 DEG C, keep the temperature for 60 minutes, add 1130 grams of food-grade mineral oil for rapid cooling, when the temperature drops below 140 DEG C, add 812 grams of polytetrafluoroethylene micropowder, carry out aftertreatment after stirring to obtain the finished product fat. The lubricating grease performance that process formula of the present invention makes is listed in the following table:

[0052]

[0053] It can be seen from the above table that the rubber compatibility, high and low temperature performance and water resistance performance of the lubricating grease of the present invention are all very good.

[0054] ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M177/00C10N50/10C10N40/00
Inventor 张广辽吴宝杰高艳青刘庆廉李素冯玉保
Owner CHINA PETROLEUM & CHEM CORP
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