Centrifugal compressor oil additive, centrifugal compressor oil and centrifugal compressor

Abstract

The present invention provides a centrifugal compressor oil additive, a centrifugal compressor oil and a centrifugal compressor. The lubricating oil additive of the present invention comprises, by mass percentage, 5%-30% of ionic liquid; 5%-50% of antioxidant; 1%-30% of rust inhibitor; 1%-30% of metal passivator; 1%-20% of demulsifier; 1%-20% of antifoaming agent; and a diluent oil balance; wherein the ionic liquid comprises a structure of formula 1. The lubricating oil additive of the present invention has relatively excellent anti-oxidation, anti-corrosion, anti-emulsification, anti-foaming and environmental friendliness.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oil, and in particular to a centrifugal compressor oil additive, a centrifugal compressor oil and a centrifugal compressor. Background Art

[0002] Centrifugal compressors use a power machine to drive the worm gear in the air end to rotate at high speed through a gearbox, and use centrifugal force to compress the inhaled air and then output it. They have the advantages of large and uniform exhaust volume, good regulation performance, and reliable operation. They are generally used in medium and low pressure conditions. Due to the high-speed rotation of the turbine and the influence of air and moisture, centrifugal compressor oil is very easy to oxidize, emulsify or produce foam during use, which will cause equipment corrosion.

[0003] Therefore, there is an urgent need to provide a centrifugal compressor oil additive that has relatively excellent anti-oxidation, anti-rust, anti-emulsification, anti-foaming and environmentally friendly properties. Summary of the invention

[0004] The invention provides a centrifugal compressor oil additive, which can have relatively excellent anti-oxidation, anti-corrosion, anti-emulsification, anti-foaming and environmental friendliness.

[0005] The invention provides a centrifugal compressor oil. The centrifugal compressor oil comprises the centrifugal compressor oil additive and thus has relatively excellent anti-oxidation, anti-corrosion, anti-emulsification, anti-foaming and environmental friendliness.

[0006] The present invention provides a centrifugal compressor. Since the centrifugal compressor comprises the centrifugal compressor oil, the gears and main bearings of the centrifugal compressor have good mechanical sealing performance, long service life and wide application range.

[0007] The present invention provides a centrifugal compressor oil additive, which comprises, by mass percentage:

[0008]

[0009] Wherein, the ionic liquid comprises the following structure:

[0010]

[0011] Wherein, n is a positive integer selected from 4-9.

[0012] The centrifugal compressor oil additive as described above, wherein the content by mass percentage includes:

[0013]

[0014] The centrifugal compressor oil additive as described above, wherein the mass ratio of the antioxidant to the ionic liquid is 1:(0.1-2).

[0015] The centrifugal compressor oil additive as described above, wherein the antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine and α-methylstyryldiphenylamine.

[0016] The centrifugal compressor oil additive as described above, wherein the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

[0017] The centrifugal compressor oil additive as described above, wherein the metal passivator is selected from at least one of alkylthiadiazole, methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

[0018] The centrifugal compressor oil additive as described above, wherein the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0019] The centrifugal compressor oil additive as described above, wherein the antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate and polyacrylate.

[0020] The centrifugal compressor oil additive as described above, wherein the diluent oil is an inert neutral oil.

[0021] The present invention also provides a centrifugal compressor oil, which comprises the centrifugal compressor oil additive as described above.

[0022] The present invention also provides a centrifugal compressor, which comprises the centrifugal compressor oil as described above.

[0023] The present invention provides a centrifugal compressor oil additive, which includes a specific content of ionic liquid, an antioxidant, a rust inhibitor, a metal passivator, a demulsifier, an antifoaming agent and a diluent oil, and the ionic liquid includes a structure of Formula 1. Since the ionic liquid constituting the centrifugal compressor oil additive includes the structure of Formula 1, the centrifugal compressor oil additive has relatively excellent anti-oxidation, anti-corrosion, anti-emulsification and anti-foaming properties; and the ionic liquid also has the advantage of excellent solubility, and can be relatively well compatible with other components, further improving the anti-emulsification, anti-foaming, anti-oxidation and anti-corrosion properties of the centrifugal compressor oil additive. It is worth mentioning that the ionic liquid does not contain sulfur and phosphorus elements. The use of the ionic liquid can reduce the content of sulfur and phosphorus elements in the centrifugal compressor oil additive as much as possible, so the environmental performance of the centrifugal compressor oil additive can be improved.

[0024] The centrifugal compressor oil of the present invention, because it includes the above centrifugal compressor oil additive, not only has relatively excellent anti-emulsification, anti-foaming, anti-oxidation and anti-corrosion properties, but also has good environmental protection and has a relatively broad application prospect.

[0025] The centrifugal compressor of the present invention comprises the above-mentioned centrifugal compressor oil, so the mechanical sealing performance of the gears and the main bearings is good, and the centrifugal compressor has a long service life and a wide range of applications. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The first aspect of the present invention provides a centrifugal compressor oil additive, which comprises, by mass percentage:

[0028]

[0029] Wherein, the ionic liquid comprises the following structure:

[0030]

[0031] Wherein, n is a positive integer selected from 4-9.

[0032] The present invention does not limit the specific source of the ionic liquid. The ionic liquid can be prepared by a preparation method commonly used in the art, or it can be purchased commercially.

[0033] The antioxidant, rust inhibitor, metal passivator, demulsifier, antifoaming agent and diluent oil of the present invention are not particularly limited and can be selected from the antioxidants, rust inhibitors, metal passivators, demulsifiers, antifoaming agents and diluent oils commonly used in the art.

[0034] In the present invention, the main component of the centrifugal compressor oil additive is the ionic liquid shown in Formula 1. On the one hand, the centrifugal compressor oil additive can show excellent compatibility when combined with other components. On the other hand, when the centrifugal compressor additive is used to prepare centrifugal compressor oil, it can significantly improve the anti-corrosion performance, anti-oxidation performance, anti-foaming performance and anti-emulsification performance of the centrifugal compressor oil.

[0035] Moreover, the ionic liquid of the present invention does not contain sulfur and phosphorus elements. The use of the ionic liquid can reduce the content of sulfur and phosphorus elements in the centrifugal compressor oil additive as much as possible, so that the centrifugal compressor oil additive not only has excellent antioxidant, anti-corrosion, anti-foaming and anti-emulsification properties, but also has excellent environmental protection performance.

[0036] Furthermore, when the centrifugal compressor oil additive comprises, by mass percentage:

[0037] Ionic liquid 10%-20%;

[0038] Antioxidant 20%-40%;

[0039] Rust inhibitor 10%-20%;

[0040] Metal passivator 10%-20%;

[0041] Demulsifier 5%-15%;

[0042] Antifoaming agent 5%-10%;

[0043] When diluting the oil balance, the centrifugal compressor oil additive has more excellent anti-oxidation, anti-corrosion, anti-foaming and anti-emulsification properties.

[0044] In some embodiments of the present invention, in order to further improve the anti-oxidation, anti-foaming, anti-emulsification and anti-corrosion properties of the centrifugal compressor oil additive, the mass ratio of the antioxidant to the ionic liquid is 1:(0.1-2).

[0045] In the present invention, the raw materials of ionic liquid, antioxidant, rust inhibitor, metal passivator, demulsifier, antifoaming agent and diluent oil can be further selected to further improve the compatibility of each raw material and improve the antioxidant, anti-corrosion, anti-foaming, anti-emulsification and environmental protection performance of the centrifugal compressor oil additive.

[0046] In some embodiments of the present invention, the antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine and α-methylstyryldiphenylamine.

[0047] In some embodiments of the present invention, the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

[0048] In some embodiments of the present invention, the metal deactivator is selected from at least one of alkylthiadiazole, methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

[0049] In some embodiments of the present invention, the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0050] The present invention does not particularly limit the oil-soluble polyether, and the oil-soluble polyether commonly used in the art can be selected.

[0051] In the present invention, the condensate of amine and ethylene oxide refers to a compound formed by a condensation reaction between an amino group in an amino compound and an epoxy group in ethylene oxide. The condensate of fatty alcohol and ethylene oxide refers to a compound formed by a condensation reaction between a hydroxyl group in a fatty alcohol and an epoxy group in ethylene oxide. The present invention does not limit the amount of the compound participating in the condensation reaction, nor does it specifically limit the specific conditions of the condensation reaction, as long as the above-mentioned condensation reaction can occur.

[0052] In the present invention, each condensate can also be obtained by commercial purchase.

[0053] In some embodiments of the present invention, the antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate, and polyacrylate.

[0054] The present invention does not particularly limit the composite antifoaming agent, and the composite antifoaming agent commonly used in the art can be selected.

[0055] In some embodiments of the present invention, the diluent oil is an inert neutral oil. The present invention does not specifically limit the inert neutral oil, and the inert neutral oil can be selected from the inert neutral oil commonly used in the art, for example, the inert neutral oil can be HVI 150.

[0056] The present invention does not impose any particular limitation on the molecular weight of the above polymer.

[0057] The centrifugal compressor oil additive in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0058] The centrifugal compressor oil additive of the present invention not only has relatively excellent anti-oxidation, anti-foaming, anti-emulsification, anti-corrosion and environmental friendliness, but also has simple preparation process, easy operation and wide application range.

[0059] A second aspect of the present invention provides a centrifugal compressor oil, comprising the centrifugal compressor oil additive described above.

[0060] In the present invention, a certain amount of centrifugal compressor oil additive is mixed with a base oil commonly used in the art to obtain centrifugal compressor oil. Since the centrifugal compressor oil includes the centrifugal compressor oil additive, the centrifugal compressor oil has relatively excellent anti-oxidation, anti-corrosion, anti-foaming, anti-emulsification and environmental friendliness.

[0061] A third aspect of the present invention provides a centrifugal compressor, which includes the centrifugal compressor oil described above.

[0062] The centrifugal compressor of the present invention includes the above-mentioned centrifugal compressor oil, so in actual application, the mechanical sealing performance of the gears and the main bearings is good, the service life is long, and the application range is wide.

[0063] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0064] The ionic liquid in each embodiment is

[0065]

[0066] Wherein, n is a positive integer selected from 4 to 9 and is obtained through commercial purchase;

[0067] The inert neutral oil in each embodiment and comparative example is HVI 150;

[0068] The oil-soluble polyether in each embodiment and comparative example is BASF L101;

[0069] The condensation products of amine and ethylene oxide in each embodiment and comparative example were purchased from Danyang Tianyu;

[0070] The polyacrylates in the examples and comparative examples were purchased from Evonik;

[0071] The 1# composite antifoaming agent in each embodiment and comparative example was purchased from Jinzhou Runda;

[0072] The fatty alcohol and ethylene oxide condensates in the examples and comparative examples were purchased from Lushun Chemical Factory;

[0073] The 2# composite antifoaming agent in each embodiment and comparative example was purchased from Jinzhou Runda;

[0074] The Class II base oil in each embodiment and comparative example is PetroChina HVIP6;

[0075] The alkylthiadiazoles in the examples and comparative examples were purchased from BASF;

[0076] The alkenyl succinic acid in each example and comparative example is T746, which is purchased from a commercial source.

[0077] Example 1

[0078] The centrifugal compressor oil of this embodiment is obtained by mixing the centrifugal compressor oil additive shown in Table 1 with a Class II base oil;

[0079] Wherein, based on the total mass of the centrifugal compressor oil, the mass percentage content of the centrifugal compressor oil additive is 1%.

[0080] Table 1

[0081]

[0082]

[0083] Example 2

[0084] The composition of the centrifugal compressor oil of this embodiment is substantially the same as that of the centrifugal compressor oil of Embodiment 1, except that the centrifugal compressor oil additive shown in Table 2 is used to replace the centrifugal compressor oil additive in Embodiment 1.

[0085] Table 2

[0086] name Mass percentage / % Ionic liquid (n=4) 20 2,6-Di-tert-butyl-p-cresol 20 Octylbutyldiphenylamine 20 Succinic acid 10 Tolyltriazole 5 Amine and ethylene oxide condensation product 5 Polyacrylate 15 Inert neutral oil 5

[0087] Example 3

[0088] The composition of the centrifugal compressor oil of this embodiment is substantially the same as that of the centrifugal compressor oil of Embodiment 1, except that the centrifugal compressor oil additive shown in Table 3 is used to replace the centrifugal compressor oil additive in Embodiment 1.

[0089] Table 3

[0090]

[0091]

[0092] Example 4

[0093] The composition of the centrifugal compressor oil of this embodiment is substantially the same as that of the centrifugal compressor oil of Embodiment 1, except that the centrifugal compressor oil additive shown in Table 4 is used to replace the centrifugal compressor oil additive in Embodiment 1.

[0094] Table 4

[0095] name Mass percentage / % Ionic liquid (n=9) 15 Styryl octyl diphenylamine 29 Barium dinonylnaphthalenesulfonate 10 Tolyltriazole 10 Fatty alcohol and ethylene oxide condensation product 5 1# Composite antifoaming agent 5 Inert neutral oil 26

[0096] Example 5

[0097] The composition of the centrifugal compressor oil of this embodiment is substantially the same as that of the centrifugal compressor oil of Embodiment 1, except that the centrifugal compressor oil additive shown in Table 5 is used to replace the centrifugal compressor oil additive in Embodiment 1.

[0098] Table 5

[0099]

[0100]

[0101] Example 6

[0102] The composition of the centrifugal compressor oil of this embodiment is substantially the same as that of the centrifugal compressor oil of Embodiment 1, except that the centrifugal compressor oil additive shown in Table 6 is used to replace the centrifugal compressor oil additive in Embodiment 1.

[0103] Table 6

[0104] name Mass percentage / % Ionic liquid (n=9) 20 2,6-Di-tert-butyl-p-cresol 2 Dioctyldiphenylamine 3 Isononylphenoxyacetic acid 6 Alkyl thiadiazole 8 Oil soluble polyether 3 1# Composite antifoaming agent 5 Inert neutral oil 53

[0105] Comparative Example 1

[0106] The composition of the centrifugal compressor oil of this comparative example is substantially the same as that of the centrifugal compressor oil of Example 1, except that the centrifugal compressor oil additive shown in Table 7 is used to replace the centrifugal compressor oil additive in Example 1.

[0107] Table 7

[0108]

[0109]

[0110] Comparative Example 2

[0111] The composition of the centrifugal compressor oil of this comparative example is substantially the same as that of the centrifugal compressor oil of Example 1, except that the centrifugal compressor oil additive shown in Table 8 is used to replace the centrifugal compressor oil additive in Example 1.

[0112] Table 8

[0113] name Mass percentage / % 2,6-Di-tert-butyl-p-cresol 20 Dioctyldiphenylamine 40 Isononylphenoxyacetic acid 10 Alkyl thiadiazole 10 Oil soluble polyether 1 1# Composite antifoaming agent 1 Inert neutral oil 18

[0114] Comparative Example 3

[0115] The composition of the centrifugal compressor oil of this comparative example is substantially the same as that of the centrifugal compressor oil of Example 1, except that the centrifugal compressor oil additive shown in Table 9 is used to replace the centrifugal compressor oil additive in Example 1.

[0116] Table 9

[0117]

[0118]

[0119] Comparative Example 4

[0120] The composition of the centrifugal compressor oil of this comparative example is substantially the same as that of the centrifugal compressor oil of Example 1, except that the centrifugal compressor oil additive shown in Table 10 is used to replace the centrifugal compressor oil additive in Example 1.

[0121] Table 10

[0122] name Mass percentage / % Ionic liquid (n=9) 32 2,6-Di-tert-butyl-p-cresol 30 Dioctyldiphenylamine 3 Isononylphenoxyacetic acid 10 Alkyl thiadiazole 5 Oil soluble polyether 5 1# Composite antifoaming agent 10 Inert neutral oil 5

[0123] Performance Characterization

[0124] 1. The performance of Group II base oil was tested. The test results are shown in Table 11.

[0125] Table 11

[0126]

[0127]

[0128] 2. The performance of the centrifugal compressor oils in Examples 1-6 and Comparative Examples 1-4 was tested. The test results are shown in Table 12.

[0129] Table 12

[0130]

[0131] It can be seen from Table 12 that the centrifugal compressor oil prepared in the embodiment of the present invention has relatively excellent antioxidant, corrosion resistance, anti-foaming and anti-emulsification properties.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal compressor oil additive, characterized in that: According to the mass percentage, it includes: Wherein, the ionic liquid comprises the following structure: Wherein, n is a positive integer selected from 4 to 9; The antioxidant includes 2,6-di-tert-butyl-p-cresol and dioctyl diphenylamine, or the antioxidant includes 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine; The mass ratio of the antioxidant to the ionic liquid is 1:(0.1-2); The demulsifier is selected from at least one of a condensate of amine and ethylene oxide and a condensate of fatty alcohol and ethylene oxide.

2. The centrifugal compressor oil additive according to claim 1, characterized in that: According to the mass percentage, it includes: Diluent oil balance.

3. The centrifugal compressor oil additive according to claim 1 or 2, characterized in that: The rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

4. The centrifugal compressor oil additive according to claim 1 or 2, characterized in that: The metal deactivator is selected from at least one of alkylthiadiazole, methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

5. The centrifugal compressor oil additive according to claim 1 or 2, characterized in that: The antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate and polyacrylate; and / or, The diluent oil is an inert neutral oil.

6. A centrifugal compressor oil, characterized in that: The centrifugal compressor oil additive comprises the centrifugal compressor oil additive according to any one of claims 1 to 5.

7. A centrifugal compressor, characterized in that: Comprising the centrifugal compressor oil as claimed in claim 6.

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