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High-temperature lubricating grease thickening agent

A technology of lubricating grease and thickener, applied in thickener, lubricating composition, petroleum industry, etc., can solve the problems that silicon dioxide is difficult to meet the use requirements, shorten the service life of equipment, and the equipment is stuck in operation, so as to achieve increased Effect of ion exchange characteristics, expansion of cavity, and improvement of electronegativity

Active Publication Date: 2015-08-12
ZHEJIANG RENHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the high-temperature lubricating grease used in the equipment volatilizes, dries up, and deposits carbon under high-temperature conditions, the equipment will be operated in a non-lubricated state, which will have a great impact on the equipment. The metal materials of the equipment will not only produce Thermal deformation, and its strength will also be reduced, shortening the service life of the equipment, and in severe cases, lubrication accidents will occur, causing the equipment to be stuck and stop.
[0003] The thickeners used in high temperature grease are mostly lithium complex, polyurea and silicon dioxide, and the increasingly high prices of lithium complex and polyurea have brought great pressure to companies using high temperature grease, and silicon dioxide Usually difficult to meet higher usage requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 1050kg of sodium bentonite and burn at 350℃ for 1h.

[0028] Configure 500 kg of sulfuric acid solution with a mass fraction of 17%, and stir at 95 °C for 30 min for acid activation treatment. Flocculation, slag removal, filtration.

[0029] Add a certain amount of water to wash the residual acid according to 6 times the mass of the obtained material, stir for 60s, let stand for 45min, extract the supernatant, and wash repeatedly until the pH of the supernatant is 4~5. Filter and dry.

[0030] The dried bentonite was put into a ball mill and ground for 4 hours under the action of ultrasonic waves of 40KHz to prepare ultrafine bentonite.

[0031] press m 膨润土 : m 覆盖剂 =100:0.1 The obtained ultrafine bentonite was added to the dimethyloctadecylbenzylamine solution with a mass fraction of 35%, and stirred at 80°C for 2h.

[0032] The organically covered material is flocculated, filtered, transferred to drying at 30°C, and milled and passed through a 200-mesh sieve ...

Embodiment 2

[0034] Take 1070kg of sodium bentonite and burn at 370℃ for 1h.

[0035] Configure 500 kg of sulfuric acid solution with a mass fraction of 17.4%, and stir at 96 °C for 30 min for acid activation treatment. Flocculation, slag removal, filtration.

[0036] Add a certain amount of water to wash the residual acid according to 6 times the mass of the obtained material, stir for 60s, let stand for 45min, extract the supernatant, and wash repeatedly until the pH of the supernatant is 4~5. Filter and dry.

[0037] The dried bentonite was put into a ball mill and ground for 4 hours under the action of ultrasonic waves of 40KHz to prepare ultrafine bentonite.

[0038] press m 膨润土 : m 覆盖剂 =100:0.11 The obtained ultrafine bentonite was added to the dimethyl octadecylbenzylamine solution with a mass fraction of 37%, and stirred at 80 °C for 2 h.

[0039] The organically covered material is flocculated, filtered, transferred to drying at 30°C, and milled and passed through a 200-mesh ...

Embodiment 3

[0041] Take 1090kg of sodium bentonite and burn at 390℃ for 1h.

[0042] Configure 500 kg of sulfuric acid solution with a mass fraction of 17.8%, and stir at 97 °C for 30 min for acid activation treatment. Flocculation, slag removal, filtration.

[0043] Add a certain amount of water to wash the residual acid according to 6 times the mass of the obtained material, stir for 60s, let stand for 45min, extract the supernatant, and wash repeatedly until the pH of the supernatant is 4~5. Filter and dry.

[0044] The dried bentonite was put into a ball mill and ground for 4 hours under the action of ultrasonic waves of 40KHz to prepare ultrafine bentonite.

[0045] press m 膨润土 : m 覆盖剂 =100:0.12 The obtained ultrafine bentonite was added to the dimethyl octadecylbenzylamine solution with a mass fraction of 39%, and stirred at 80 °C for 2 h.

[0046] The organically covered material is flocculated, filtered, transferred to drying at 30°C, and milled and passed through a 200-mesh ...

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Abstract

The invention discloses a high-temperature lubricating grease thickening agent. The thickening agent is prepared by the following steps: burning sodium-base bentonite at a temperature of 350 to 450 for 1 hour; adding the bentonite into a sulfuric acid solution to carry out acidification for 30 minutes at a temperature of 95 to 100 DEG C, carrying out flocculation, removing the slag, filtering, washing to remove the residual acid, burning; placing the acidified bentonite in a ball mill, grinding the bentonite for 4 hours under the action of ultrasonic waves with a frequency of 40 KHz; preparing a dimethyl octadecyl benzyl amine solution with a mass percentage of 35 to 45% according to m(bentonite):m(covering agent)=100:0.1-0.15, soaking the obtained superfine bentonite in the dimethyl octadecyl benzyl amine solution, stirring for 2 hours at a temperature of 80 DEG C, filtering, drying, grinding, and sieving by a 200-mesh sieve to obtain the thickening agent. The provided thickening agent can be used to prepare high-temperature lubricating grease.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a thickening agent. More specifically, the invention relates to a thickening agent used for thickening when preparing high-temperature lubricating grease. Background technique [0002] High-temperature greases are generally used in environments above 180°C, up to about 800°C, and are used in many industries. If the high-temperature grease used in the equipment is volatilized, dried up and coke deposited under high temperature conditions, the equipment will be operated in a non-lubricated state, which will have a great impact on the equipment. The metal materials of the equipment will not only produce Thermal deformation, and its strength will also be reduced, shortening the service life of the equipment, and in severe cases, lubrication accidents will occur, causing the equipment to be stuck and stopped. [0003] The thickeners used in high-temperature grease are mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M113/16
Inventor 张怀滨张有连俞铁明姜跃平姜健张怀辉
Owner ZHEJIANG RENHENG CHEM