阅读说明：本技术 一种压缩机润滑油组合物及其制备方法 (Compressor lubricating oil composition and preparation method thereof ) 是由 陶菲 魏文红 李健 李潘源 赵玉贞 吴旭东 于 2019-10-14 设计创作，主要内容包括：本发明提供了一种压缩机润滑油组合物,由包括以下组分的原料制备而成：聚烷撑二醇95wt％～99.9wt％；抗氧剂0.05wt％～2.5wt％；腐蚀抑制剂0.05wt％～2.5wt％；所述聚烷撑二醇在40℃的运动黏度为50mm<Sup>2</Sup>/s～400mm<Sup>2</Sup>/s。与现有技术相比,本发明提供的压缩机润滑油组合物以特定性质的聚烷撑二醇为主要组分,并与其它特定含量组分实现较好的相互作用,得到的压缩机润滑油组合物具有良好的热氧化安定性、优良的润滑性能、较好的黏温性能、较低的积碳倾向、优异的抗腐蚀防锈性能,为烃类气体压缩机提供良好润滑、密封、冷却等作用,同时,具备优良的抵抗轻烃稀释能力,有效防止黏度过度下降造成压缩机润滑不良。(The invention provides a compressor lubricating oil composition which is prepared from the following raw materials: 95 to 99.9 weight percent of polyalkylene glycol; 0.05 wt% -2.5 wt% of antioxidant; 0.05 wt% -2.5 wt% of corrosion inhibitor; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm 2 /s～400mm 2 And s. Compared with the prior art, the invention provides the pressureThe compressor lubricating oil composition takes polyalkylene glycol with specific properties as a main component, and realizes better interaction with other components with specific contents, so that the obtained compressor lubricating oil composition has good thermal oxidation stability, excellent lubricating performance, better viscosity-temperature performance, lower carbon deposition tendency, excellent corrosion resistance and rust resistance, provides good lubricating, sealing, cooling and other effects for a hydrocarbon gas compressor, and simultaneously has excellent light hydrocarbon dilution resistance, and effectively prevents poor compressor lubrication caused by excessive viscosity reduction.)

1. The compressor lubricating oil composition is prepared from the following raw materials:

95 to 99.9 weight percent of polyalkylene glycol;

0.05 wt% -2.5 wt% of antioxidant;

0.05 wt% -2.5 wt% of corrosion inhibitor;

the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

2. The compressor lubricating oil composition of claim 1, wherein the polyalkylene glycol is selected from propylene oxide homo-monohydroxy ethers and/or ethylene oxide propylene oxide co-monohydroxy ethers.

3. The compressor lubricating oil composition of claim 1, wherein the antioxidant is selected from an organic phenolic antioxidant and/or an organic amine antioxidant.

4. The compressor lubricating oil composition of claim 1, wherein the corrosion inhibitor is selected from one or more of a sulfonate, a fatty acid derivative compound, and a complex phosphate compound.

5. A method for preparing a lubricating oil composition for compressors according to any one of claims 1 to 4, comprising the steps of:

a) mixing polyalkylene glycol, an antioxidant and a corrosion inhibitor, and blending to obtain a compressor lubricating oil composition; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

6. The preparation method according to claim 5, wherein the mixing in step a) is specifically performed by:

and adding the antioxidant and the corrosion inhibitor into the polyalkylene glycol in sequence to complete the mixing process.

7. The method of claim 5, wherein the blending in step a) is performed under vacuum; the vacuum degree under the vacuum condition is less than-0.8 MPa.

8. The method according to claim 5, wherein the blending in step a) is carried out by stirring; the stirring temperature is 80-120 ℃.

Technical Field

The invention relates to the technical field of lubricating oil, in particular to a compressor lubricating oil composition and a preparation method thereof.

Background

In the petrochemical industry and other industries, the transportation, bottling, separation and recovery of natural gas, propane, ethylene, butadiene, vinyl chloride and other hydrocarbon gases need to be realized through a gas compressor, and compressor lubricating oil provides reliable lubricating, sealing, cooling and other functions for the hydrocarbon gas compressor. Because the lubricating oil of the compressor is directly contacted with the compressed gas, the lubricating oil is easily affected by the properties of the compressed gas to aggravate oxidation, aging and deterioration; h in hydrocarbon gases₂S component, Process gas SO₂、NH₃The components are equal, and the corrosion is caused to core components such as compressor bearing pistons, rotors and the like; in addition, many gas compression processes have strict requirements on the purity of the compressed gas, and the toxicity of the lubricant additive needs to be considered to ensure that the lubricant does not react with the gas and affect the purity of the gas. Therefore, the compressor lubricating oil has the performance characteristics of proper viscosity, small carbon deposition tendency, good oxidation stability, good corrosion resistance, good rust resistance and the like.

The specific operating conditions of the hydrocarbon gas compressor determine that the compressor lubricating oil used needs to have the following main properties: (1) the lubricating oil has good viscosity-temperature performance, the viscosity of the lubricating oil cannot be too high at low temperature, and the lubricating oil can be fully distributed to a lubricating part; at high temperature, the viscosity of the lubricating oil cannot be too low, and the lubricating oil forms a thick enough oil film at the lubricating part to ensure good lubrication; (2) the material has good fluidity at low temperature; (3) the lubricating oil has good thermal oxidation stability and chemical stability, and is easy to age and deteriorate due to the catalytic action of high temperature, high pressure and metal in the use process of the lubricating oil for the compressor, so that various acids and precipitates are generated, and the quality of the thermal oxidation stability of the lubricating oil not only influences the service life of oil products, but also finally influences the reliability of the operation of the compressor; (4) the lubricating agent has good lubricating performance, reduces the abrasion of a friction surface and ensures the normal operation of equipment; (5) lower carbon deposition tendency; (6) can resist the dilution of light hydrocarbon, prevent the viscosity from excessively dropping and causing the poor lubrication of the compressor; (7) has good corrosion resistance and rust resistance, and ensures the normal operation of equipment. However, the prior art compressor lubricants have not fully satisfied the above-mentioned performance requirements.

Disclosure of Invention

The compressor lubricating oil composition provided by the invention has good thermal oxidation stability, excellent lubricating property, better viscosity-temperature property, lower carbon deposition tendency and excellent corrosion and rust resistance, provides good lubricating, sealing, cooling and other effects for a hydrocarbon gas compressor, and simultaneously has excellent light hydrocarbon dilution resistance capability, and effectively prevents poor compressor lubrication caused by excessive viscosity reduction.

The invention provides a compressor lubricating oil composition which is prepared from the following raw materials:

95 to 99.9 weight percent of polyalkylene glycol;

0.05 wt% -2.5 wt% of antioxidant;

0.05 wt% -2.5 wt% of corrosion inhibitor;

the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

Preferably, the polyalkylene glycol is selected from propylene oxide homo-monohydroxy ethers and/or ethylene oxide propylene oxide co-monohydroxy ethers.

Preferably, the antioxidant is selected from organic phenolic antioxidants and/or organic amine antioxidants.

Preferably, the corrosion inhibitor is selected from one or more of sulfonate, fatty acid derivative compound and complex phosphate ester compound.

The invention also provides a preparation method of the compressor lubricating oil composition in the technical scheme, which comprises the following steps:

a) mixing polyalkylene glycol, an antioxidant and a corrosion inhibitor, and blending to obtain a compressor lubricating oil composition; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

Preferably, the mixing process in step a) is specifically:

and adding the antioxidant and the corrosion inhibitor into the polyalkylene glycol in sequence to complete the mixing process.

Preferably, the blending process in step a) is carried out under vacuum; the vacuum degree under the vacuum condition is less than-0.8 MPa.

Preferably, the blending mode in the step a) is stirring; the stirring temperature is 80-120 ℃.

The invention provides a compressor lubricating oil composition which is prepared from the following raw materials: 95 to 99.9 weight percent of polyalkylene glycol; 0.05 wt% -2.5 wt% of antioxidant; 0.05 wt% -2.5 wt% of corrosion inhibitor; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²And s. Compared with the prior art, the compressor lubricating oil composition provided by the invention takes the polyalkylene glycol with specific properties as a main component, and realizes better interaction with other components with specific contents, so that the obtained compressor lubricating oil composition has good thermal oxidation stability, excellent lubricating performance, better viscosity-temperature performance, lower carbon deposition tendency and excellent corrosion and rust resistance, provides good lubricating, sealing, cooling and other effects for a hydrocarbon gas compressor, and simultaneously has excellent light hydrocarbon dilution resistance, and effectively prevents poor lubrication of the compressor caused by excessive reduction of viscosity.

In addition, the preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a compressor lubricating oil composition which is prepared from the following raw materials:

95 to 99.9 weight percent of polyalkylene glycol;

0.05 wt% -2.5 wt% of antioxidant;

0.05 wt% -2.5 wt% of corrosion inhibitor;

the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

In the present invention, the compressor lubricating oil composition comprises, preferably consists of, a polyalkylene glycol, an antioxidant and a corrosion inhibitor.

In the present invention, the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²S, preferably 100mm²/s～200mm²S; the polyalkylene glycol is preferably selected from propylene oxide homo-monohydroxy ethers and/or ethylene oxide propylene oxide co-monohydroxy ethers, more preferably ethylene oxide propylene oxide co-monohydroxy ethers. The present invention is not particularly limited in terms of the source of the polyalkylene glycol, and any commercially available or available products of the above-mentioned propylene oxide homo-monohydroxy ether and ethylene oxide propylene oxide co-monohydroxy ether known to those skilled in the art can be used.

In the present invention, the compressor lubricating oil composition comprises 95 wt% to 99.9 wt% of polyalkylene glycol, preferably 97.3 wt% to 99.6 wt%, more preferably 99.6 wt%.

In the present invention, the antioxidant is preferably selected from organic phenolic antioxidants and/or organic amine antioxidants, more preferably organic phenolic antioxidants or organic amine antioxidants. In a preferred embodiment of the present invention, the antioxidant is an organic amine antioxidant, specifically a diisooctyl diphenylamine antioxidant; in another preferred embodiment of the present invention, the antioxidant is an organic amine antioxidant, specifically 4, 4' -bis (dimethylbenzyl) diphenylamine antioxidant; in another preferred embodiment of the present invention, the antioxidant is an organic phenolic antioxidant, in particular a TH-330 phenolic antioxidant. The source of the antioxidant is not particularly limited in the present invention, and commercially available products of the above-mentioned organic phenolic antioxidants and organic amine antioxidants known to those skilled in the art may be used.

In the present invention, the compressor lubricating oil composition comprises 0.05 wt% to 2.5 wt% of an antioxidant, preferably 0.3 wt%.

In the present invention, the corrosion inhibitor is preferably selected from one or more of sulfonate, fatty acid derivative compound and complex phosphate ester compound, more preferably fatty acid or fatty acid derivative compound, and more preferably fatty acid derivative compound. In a preferred embodiment of the present invention, the corrosion inhibitor is dodecenylsuccinic acid; in another preferred embodiment of the invention, the corrosion inhibitor is alkenyl succinic acid half ester. The source of the corrosion inhibitor is not particularly limited in the present invention, and commercially available products of the above-mentioned sulfonate, fatty acid derivative compound and complex phosphate ester compound, which are well known to those skilled in the art, may be used.

In the present invention, the compressor lubricating oil composition comprises 0.05 wt% to 2.5 wt% of a corrosion inhibitor, preferably 0.1 wt% to 1 wt%, more preferably 0.1 wt%.

The compressor lubricating oil composition provided by the invention takes polyalkylene glycol with specific properties as a main component, and realizes better interaction with other components with specific contents, so that the obtained compressor lubricating oil composition has good thermal oxidation stability, excellent lubricating property, better viscosity-temperature property, lower carbon deposition tendency, excellent corrosion resistance and rust resistance, provides good lubricating, sealing, cooling and other effects for a hydrocarbon gas compressor, and simultaneously has excellent light hydrocarbon dilution resistance, and effectively prevents poor compressor lubrication caused by excessive viscosity reduction. Therefore, the compressor lubricating oil composition provided by the invention is particularly suitable for lubricating a hydrocarbon gas compressor, can provide good lubricating, sealing, cooling and other effects for the compressor, can greatly reduce the maintenance cost of equipment, has excellent light hydrocarbon dilution resistance capability, effectively prevents poor lubrication of the compressor caused by excessive viscosity reduction, and has wide application prospects.

The invention also provides a preparation method of the compressor lubricating oil composition in the technical scheme, which comprises the following steps:

a) mixing polyalkylene glycol, an antioxidant and a corrosion inhibitor, and blending to obtain a compressor lubricating oil composition; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²/s。

The present invention first mixes polyalkylene glycol, an antioxidant, and a corrosion inhibitor. In the present invention, the polyalkylene glycol, the antioxidant and the corrosion inhibitor are the same as those described in the above technical solution, and are not described herein again.

In the present invention, the mixing process preferably includes:

and adding the antioxidant and the corrosion inhibitor into the polyalkylene glycol in sequence to complete the mixing process.

After the mixing process is finished, the mixed raw materials are blended to obtain the compressor lubricating oil composition. In the present invention, the blending process is preferably carried out under vacuum conditions; the vacuum degree of the vacuum condition is preferably less than-0.8 MPa.

In the present invention, the mixing is preferably carried out by stirring; the stirring mode is not particularly limited in the invention, and the technical scheme of manual stirring or mechanical stirring which is well known to those skilled in the art can be adopted. In the invention, the stirring temperature is preferably 80-120 ℃, and more preferably 100 ℃; and ensuring that the mixture is uniformly stirred.

The preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

The invention provides a compressor lubricating oil composition which is prepared from the following raw materials: 95 to 99.9 weight percent of polyalkylene glycol; 0.05 wt% -2.5 wt% of antioxidant;0.05 wt% -2.5 wt% of corrosion inhibitor; the kinematic viscosity of the polyalkylene glycol at 40 ℃ is 50mm²/s～400mm²And s. Compared with the prior art, the compressor lubricating oil composition provided by the invention takes the polyalkylene glycol with specific properties as a main component, and realizes better interaction with other components with specific contents, so that the obtained compressor lubricating oil composition has good thermal oxidation stability, excellent lubricating performance, better viscosity-temperature performance, lower carbon deposition tendency and excellent corrosion and rust resistance, provides good lubricating, sealing, cooling and other effects for a hydrocarbon gas compressor, and simultaneously has excellent light hydrocarbon dilution resistance, and effectively prevents poor lubrication of the compressor caused by excessive reduction of viscosity.

In addition, the preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

To further illustrate the present invention, the following examples are provided for illustration.