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Lubricating oil composition

A technology for lubricating oil compositions and mixtures, applied in lubricating compositions, petroleum industry, base materials, etc., can solve the problems of low kinematic viscosity, unevenness, low density, etc., and achieve strong thermal stability, good solubility, good The effect of low temperature performance

Pending Publication Date: 2020-07-17
山东聚乐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The refrigerating machine oil provided by the patent uses monoester as the main component, and the kinematic viscosity at 40°C is less than 7mm 2 / s, the applicable hydrocarbon refrigerant is propane R290, isobutane R600a or their mixture, and an acid scavenger formed by a compound having an epoxy ring or a carbodiimide compound is added; but the invention is due to It is mainly composed of monoester, and its kinematic viscosity is low at 40°C, which is prone to insufficient oil film. Monoester is easy to react with water at high temperature, and moisture is unavoidable in the system.
[0010] From the above patents, it can be seen that the refrigerating machine oils produced by the prior art are not generally applicable, and refrigerating machine oils suitable for HCFCs, HFCs, HC and other refrigerants are rarely reported
The ester oil prepared in the prior art has a low density and a relatively high pour point, and it is easier to form a heterogeneous phase when mixed with hydrofluorocarbons. At this time, the refrigerant tends to deposit in the lower layer because of its heavy density, and has lubricity Refrigerator oil tends to float on the upper layer, which poses a threat to the safe operation of the compressor
The refrigerating machine oil produced according to the existing technology generally has a low viscosity index, and the oil film formed at high temperature is slightly insufficient
In addition, the products made in the prior art do not provide a solution when the refrigerant leaks, and it is difficult for the operator to find the refrigerant leakage point, so that it is impossible to carry out targeted troubleshooting, which may cause serious problems in the operation of the system
Existing technical solutions do not provide the ability of biodegradability, which may pose a potential threat to the environmental impact in the event of refrigeration oil leakage
[0011] There are reports on patents that individually solve one or several of the above problems, but no patents on refrigerating machine oil that meet all the above requirements have been reported.
In addition, the prior art does not mention the use of inverter compressors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0068] Example 1-1: 254 grams of dipentaerythritol, 213 grams of isobutyric acid, 213 grams of butyric acid, 2284 grams of isooctanoic acid, and 10 grams of catalyst p-toluenesulfonic acid were added to a 5-liter three-necked flask with a reflux device, and the vacuum pump was started to adjust the pressure. Raise the temperature, keep it at 220°C for 20 minutes, and remove the generated water. After the esterification is completed, use the ultimate vacuum to remove the distilled acid, half-ester, water and other mixtures, and further remove the residual acid by washing with alkali. water, filtered to obtain polyol esters. Add 2000 grams of polyol esters in the blending kettle, commercially available code is 4,4-methylene bis(2,6-di-tert-butylphenol) alkylphenol 4.3 grams, commercially available as tricresyl phosphate of T306 21 grams of esters, 7.5 grams of dodecyloxyalkylene, 1.5 grams of benzotriazindene with a commercially available code of T706, 0.125 grams of methyl sili...

Embodiment 1-2

[0069] Embodiment 1-2: Weigh 857 grams of pentaerythritol, 390 grams of isobutyric acid, 1109 grams of butyric acid, 258 grams of adipic acid, 1399 grams of isooctanoic acid, and 19 grams of catalyst sodium bisulfate into a 5-liter three-necked flask with a reflux device, Start the vacuum pump to adjust the pressure, gradually raise the temperature, keep it warm at 240°C for 20 minutes, and remove the generated water. After the esterification is completed, use the ultimate vacuum to remove the distilled acid, half-ester, water and other mixtures, and further remove the remaining residues by washing with alkaline water. acid, remove trace water by vacuum distillation, and obtain polyol ester by filtration. Add 2000 grams of polyol esters in the blending kettle, commercially available codes are 4.2 grams of alkylphenols T501, commercially available ZDDP 10.4 grams, 6.25 grams of dodecyloxyalkylenes, commercially available codes are benzotriazindene 2.1 grams of T706 gram, commer...

Embodiment 1-3

[0070] Example 1-3: Add 272 grams of pentaerythritol, 230 grams of isobutyric acid, 750 grams of isooctanoic acid, and 8 grams of catalyst sodium bisulfate into a 2-liter three-neck flask with a reflux device, start the vacuum pump to adjust the pressure, gradually increase the temperature, and keep warm at 230 ° C After 30 minutes, remove the generated water. After the esterification is completed, use extreme vacuum to remove the distilled acid, half-ester, water and other mixtures, and further remove the residual acid by washing with alkali, remove trace water by vacuum distillation, and obtain polyol by filtration. ester. Add 1000 grams of polyol esters in the blending kettle, the commercially available code is 2.2 grams of alkylphenols named RHY505, 10 grams of tricresyl phosphates commercially available as T306, commercially available 1,6 hexanediol diglycidyl 3.5 grams of ether, 0.5 grams of benzotriazindene whose commercially available code is T706, 0.005 grams of methy...

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Abstract

A lubricating oil composition is composed of the following substance components in percentage by weight: 91.2 to 97.5 percent of polyol ester, 0.05 to 2.0 percent of an antioxidant, 0.01 to 1.0 percent of a metal deactivator, 0.01 to 3.0 percent of an acid capturing agent, 0.01 to 3.0 percent of an extrusion anti-wear agent, 1 to 500 pmm of an anti-foaming agent, and 1-100 pmm of a coloring agent.From the perspective of base oil of an oil product, the lubricating oil composition provided by the invention is obtained by selecting the density, the viscosity index, the kinematic viscosity and the intermiscibility to solve the universality problem of the refrigeration lubricating oil. According to the product prepared by the invention, hydrofluorocarbon, hydrochlorofluorocarbon, a hydrocarbonrefrigerant and a mixed refrigerant formed by mixing the hydrofluorocarbon, the hydrochlorofluorocarbon, the hydrocarbon refrigerant have relatively good intermiscibility; and good lubrication can beprovided in the equipment, a phase rich in refrigerants is prevented from entering a friction surface, and the lubricating oil is particularly suitable for lubricating an inverter compressor used inthe air conditioner industry.

Description

technical field [0001] The invention belongs to the technical field, in particular to a lubricating oil composition. Background technique [0002] In the prior art, a vapor compression refrigeration system includes components such as a compressor, a condenser, an expansion valve, and an evaporator. In the refrigeration system, the refrigerant and lubricating oil are likely to circulate repeatedly along the refrigeration system in the form of a mixture. The current refrigerants usually use chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, propane, isobutane, ammonia, etc. as refrigerants for refrigeration systems, and various types of mineral oils and synthetic oils are used as lubricating oils. [0003] However, in 1974, Mollett and Roland of the United States found that chlorofluorocarbons (freon) had a serious damage effect on the earth's atmospheric ozone layer and affected human health. In order to protect the ozone layer, the international community r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M105/38C10M105/42C10M171/00C10N30/06C10N30/02C10N20/02C10N30/08C10N40/30C10N30/20
CPCC10M105/38C10M105/42C10M169/044C10M171/008C10M2207/026C10M2207/042C10M2207/301C10M2215/223C10M2223/041C10M2223/045C10M2223/047C10M2229/041
Inventor 陈美名李元明
Owner 山东聚乐新材料科技有限公司
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