WO2017050982A1

WO2017050982A1 - Lubricant compositions

Info

Publication number: WO2017050982A1
Application number: PCT/EP2016/072719
Authority: WO
Inventors: Hans-Jürgen SCHOLZ
Original assignee: Addinol Lube Oil Gmbh
Priority date: 2015-09-25
Filing date: 2016-09-23
Publication date: 2017-03-30
Also published as: EP3353271B1; EP3353271A1; CN108138073A; US20190085259A1

Abstract

The invention relates to lubricant compositions suitable in particular for lubricating turbines or (turbo) compressors used for compressing chlorine and/or products containing chlorine. The lubricant composition comprises a base oil, an anti-hydrolysis component, and a rust and oxidation inhibitor.

Description

lubricant compositions

The present invention relates to lubricant compositions which are particularly suitable for the lubrication of turbines or (turbo) compressors, which serve for the compression of chlorine and / or chlorine-containing products.

Lubricating oils for turbines and compressors are known from the prior art. Thus, WO 201 1/070141 describes a lubricating oil composition which contains, in addition to a base oil, a succinic acid derivative and an epoxy compound as additives. WO 2008/074760 also describes lubricating oil compositions known as

Additives contain an aspartic acid derivative and an epoxy compound or a fatty acid ester of a polyhydric alcohol. Lubricants for turbocompressors or turbines, which serve for the compression of chlorine or chlorine-containing products, are known. These lubricants usually comprise a highly refined base oil mixture, an additive combination for rust and oxidation inhibition and optionally defoamers. For the use of lubricants in compressors with gears, the addition of EP (extreme pressure / high pressure) additives is known, see WJ Bartz, additives for lubricants, expert-Verlag, Renningen-Malmsheim 1994. The above-mentioned lubricants from the prior art However, they have the disadvantage of low resistance to chlorine or chlorine-containing products and cause corrosion of metals that come into contact with the chlorine-containing lubricants. Usually, the lubricants of the prior art have a resistance to chlorine of up to at most 50 ppm in the oil. However, this is insufficient because chlorine dissolves in significantly higher quantities in lubricating oils.

In order to prevent the leakage of highly toxic chlorine gas in the compression of chlorine in compressors, special safety measures are required for the sealing to the outside. For example, bushings for lifting movement are equipped with bellows and shaft bushings are additionally sealed with sealing gas. At the tightness and reliability of the valves and Vorleitantriebe used highest demands are made.

Occurs despite these safety measures described chlorine in a lubricant from the prior art, the lubricant is oxidized very quickly and thereby aging within a very short time. Furthermore, an acidification of the lubricant is observed. This manifests itself in a sharp increase in the acid number. By the At the same time destruction of the corrosion protection additives contained in the lubricant is lost the protective function of the lubricant compared to metallic plant materials. As a result, a corrosive attack occurs on bearings and other parts of the system. The unplanned, corrosion-related dismantling of plant components leads to plant shutdowns and shutdowns. The cost of removing the damaged equipment, cleaning the equipment and replacing the damaged equipment is very high. Due to the low resistance to chlorine or chlorine-containing products, the lubricants from the prior art have only a short life.

The present invention is therefore based on the object to provide a lubricant composition which has improved resistance to chlorine and chlorine-containing products and should not cause corrosion. In particular, it is an object of the invention to provide a lubricant composition having the above-mentioned properties, which is suitable for use in the lubrication of turbines or (turbo) compressors, which serve for the compression of chlorine and / or chlorine-containing products.

This object is achieved by a lubricant composition comprising a base oil, a hydrolysis protection component and a rust and oxidation inhibitor.

The present invention therefore relates to lubricant compositions comprising a) a base oil having a viscosity of 30 to 70 mm ² / s at 40 ° C, b) a hydrolysis protective component comprising at least one C ² -C 22 -fatty acid C 1 -C 12 -alkyl ester and / or epoxidized at least one epoxidized C 11 -C 22 fatty acid glyceride, having an epoxide oxygen content of 1 to 10 wt .-%, based on the total mass of epoxidized fatty acid Ci-Ci2-alkyl ester and / or epoxidized fatty acid glyceride, and c) a rust and oxidation inhibitor selected under at least one single or multiple Ci-Ci2-alkyl-substituted phenol, at least one aryl amine and at least one mono- or polysubstituted triazole and mixtures of two or more of these components.

The viscosity of the hydrocracking oil is to be understood as meaning the kinematic viscosity, which is determined with a Stabinger Viscometer SVM 3000, Anton Paar GmbH, at 40 ° C. Epoxy oxygen content means the percentage by weight of oxygen, based on the total mass of epoxidized compounds. According to one embodiment, the composition according to the invention comprises, as component a), a base oil with a viscosity index of> 120, in particular 130 130, the viscosity being measured at a temperature of 40 ° C. and 100 ° C. with a Stabinger Viscometer SVM 3000, Anton Paar GmbH , According to another embodiment, the base oil comprises at least one oil of quality group III of the base oils according to the classification of the American Petroleum Institute. Group III base oils are mineral oils which have undergone strong hydrocracking and further dewaxing. These oils are characterized by very good oxidation stability and generally have a viscosity index of more than 120. According to a further embodiment, component a) is thus a base oil comprising at least one hydraulic oil.

In a further embodiment, the base oil of component a) has a viscosity of 40 to 60 mm ² / s at 40 ° C.

The base oil is generally contained in the composition in an amount of at least 80% by weight, preferably at least 90% by weight and in particular at least 95% by weight, based in each case on the total weight of the composition.

In one embodiment, component a) additionally comprises at least one further base oil component selected from mineral oils, natural oils, hydrogenated polyolefins, poly-α-olefins of olefins having 8 to 14 carbon atoms, for example poly-1 -decene or oligomers of different olefins with 8 to 14 carbon atoms, polyisobutenes having a molecular weight of 300 to 6000 g / mol, esters of aliphatic dicarboxylic acids such as azelaic acid, sebacic acid or adipic acid, with a polyglycol having a molecular weight of 500 to 2500 g / mol and a primary C6-Ci8 alcohol or Esters of aliphatic dicarboxylic acids, such as azelaic acid, sebacic acid or adipic acid, with a polyglycol having a molecular weight of 500 to 2500 g / mol and a monocarboxylic acid (complex ester, Ullmann's Encyclopedia of Industrial Chemistry, Volume A15, 1990, pages 438-440), Ce-ds-alkyl esters of phosphorous acid, C6-Ci8-alkyl esters of phosphoric acid, diesters of C6-C12 - Dicarboxylic acids with C6-C18 alcohols, and polyalkyl ether oils which may be perhalogenated, for example perfluorinated, or partially halogenated, for example partially fluorinated. preferential The other Grundol component is selected from mineral oils or hydrogenated polyolefin oils.

If present, the amount of another base oil component is in the range of 1 to 20 weight percent, based on the total amount of Grundol component (a).

The lubricant composition according to the invention comprises as component b) a hydrolysis protection component. The antihydrolysis component is generally contained in the composition in an amount of 0.05 to 1.5% by weight, preferably 0.05 to 0.9% by weight, based in each case on the total weight of the composition.

In one embodiment of the invention, the fatty acid of the fatty acid alkyl esters and fatty acid glycerides of component b) is selected from fatty acids containing natural oils such as soybean oil, thistle oil, grape seed oil, mustard oil, coriander oil, linseed oil, rapeseed oil, borage oil, tung oil, evening primrose oil, walnut oil, Hemp oil, sunflower oil, olive oil, palm oil, peanut oil, coconut oil, castor oil or fish oil are based, preferably among the fatty acids, which are based on soybean oil, linseed oil, rapeseed oil or fish oil.

Examples of fatty acids which may be based on the abovementioned oils are unsaturated fatty acids having 1 to 22 carbon atoms, for example undecylenic acid, myristoleic acid, palmitoleic acid, petroselinic acid, oleic acid, elaidic acid, vaccenic acid, gadoleic acid, losenoic acid, cetoleic acid, erucic acid, Linoleic acid, alpha-linolenic acid, gamma-linolenic acid, calendic acid, punicic acid, alpha

Elaeostearic acid, beta-elaeostearic acid, arachidonic acid, timnodonic acid, cervonic acid or clupanodonic acid.

Among the C 1 -C 12 -alkyl esters of the epoxidized fatty acids are the C 6 -C 10 -alkyl esters, in particular the C 8 -alkyl esters, e.g. the 2-ethylhexyl esters, preferred. By C1-C12-alkyl are meant linear or branched saturated hydrocarbon radicals having 1 to 12 carbon atoms.

Among the fatty acid glycerides mentioned are triesters of glycerol with C11-C22 fatty acids to understand. The glycerol can be esterified in triplicate with the respectively identical fatty acid or with two or three different fatty acids. The epoxidized Cn-C22-fatty acid-Ci-Ci2-alkylester and epoxidized C11-C22-Fettsäureglyceride can each be present individually or together as mixtures as a component of the hydrolysis protection component. Preferably, component b) comprises mixtures of epoxidized Cn-C22-fatty acid-Ci-Ci2-alkyl esters and epoxidized Cn-C22-Fettsäureglyceriden.

The fatty acid alkyl esters may be present as a fatty acid alkyl ester or as a mixture of two or more fatty acid alkyl esters. The fatty acid glycerides may be present as a fatty acid glyceride or as a mixture of two or more fatty acid glycerides.

The percentage by weight of oxygen, based on the total mass of epoxidized fatty acid C 1 -C 12 -alkyl ester and / or epoxidized fatty acid glyceride, in one embodiment of the lubricant composition according to the invention is 3 to 8% by weight.

The production of the Cn-C22-fatty acid-Ci-Ci2-alkylester and epoxidized C11-C22-Fettsäureglyceride is carried out in the usual manner, for example according to the in J. Am. Chem. Soc. 62 (1945), pp. 412-414. The determination of the epoxide content is carried out in a customary manner, for example according to the method described in EP 1693359 or DIN 16945.

The lubricant composition of the invention comprises as component c) a rust and / or oxidation inhibitor. The rust and / or oxidation inhibitor is generally contained in the composition in an amount of 0.05 to 2% by weight, preferably 0.05 to 1.0% by weight, based in each case on the total weight of the composition.

In one embodiment of the invention, component (c) comprises at least one mono- or polysubstituted C1-C12-alkyl-substituted phenol or at least one arylamine or at least one singly or multiply substituted triazole. In a further embodiment of the invention, component (c) comprises at least one singly or multiply C 1 -C 12 -alkyl-substituted phenol and at least one arylamine or at least one singly or multiply substituted triazole. In a further embodiment of the invention, component (c) comprises at least one arylamine and at least one singly or multiply substituted triazole. In a further embodiment of the invention, component (c) comprises at least one singly or multiply C 1 -C 12 -alkyl-substituted phenol and at least one arylamine and at least one singly or multiply substituted triazole. In one embodiment of the invention, the Ci-Ci2-alkyl-substituted phenol of the component c) is selected from Ci-Ci2-alkyl-substituted phenols with sterically demanding substituents, such as isopropyl or tert. Butyl. The phenol can be substituted with one substituent or with 2, 3, 4 or 5 substituents. Preferably, the phenol is substituted twice or three times.

In one embodiment, the Ci-Ci2-alkyl-substituted phenols are selected from 2,6-di-tert-butylphenol, 4-methyl-2,6-di-tert-butylphenol, 2,4,6-tri-tert-butylphenol , 2-tert-butylphenol, 2,6-diisopropylphenol, 2-methyl-6-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol and 4-ethyl-2,6-di-tert-butylphenol.

Component c) may comprise a C 1 -C 12 -alkyl-substituted phenol or a mixture of two or more C 1 -C 12 -alkyl-substituted phenols.

In one embodiment of the invention, component c) comprises at least one arylamine which is selected from

Alkyldiphenylamines of the general formula (I)

where R ¹ , R ² , R ³ and R ^{4 are} identical or different and represent hydrogen or C ¹ -C ⁶ -alkyl,

Phenyl-a-naphthylamines of the general formula (II)

wherein R ^{5 is} hydrogen or Ci-Cis-alkyl and

Phenyl-.beta.-naphthylamines of the general formula (III)

wherein R ^{6 is} hydrogen or Ci-Cis-alkyl.

R ¹ , R ² , R ³ and R ⁴ may each stand for hydrogen. Preferably, however, at least one of the radicals is an alkyl group having 1 to 18 carbon atoms, especially 8 to 18 carbon atoms. The alkyl groups may be linear or branched. Such an alkyl group may include a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, amyl group, hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, isononyl group , Decyl, undecyl, dodecyl, tridecyl, isotridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, or octadecyl.

In the general formula (II), R ^{5 is} a hydrogen atom or an alkyl group having 1 to 18 carbon atoms. Preferably, R ^{5 is} an alkyl group of 1 to 18 carbon atoms, more preferably 8 to 18 carbon atoms. The alkyl group having 1 to 18 carbon atoms is as defined for R ¹ to R ⁴ .

In the general formula (III), R ^{6 is} a hydrogen atom or an alkyl group having 1 to 18 carbon atoms. Preferably, R ^{6 is} an alkyl group of 1 to 18 carbon atoms, more preferably 8 to 18 carbon atoms. The alkyl group having 1 to 18 carbon atoms is as defined for R ¹ to R ⁴ .

Component c) may comprise an alkyldiphenylamine of the general formula (I) alone, but also mixtures of two or more alkyldiphenylamines of the general formula (I). Furthermore, component c) may comprise a phenyl-alphanaphthylamine of general formula (II) alone, or else mixtures of two or more phenyl-alpha-naphthylamines (II). Furthermore, component c) may comprise a phenyl-beta-naphthylamine of the general formula (III) alone, or else mixtures of two or more phenyl-alpha-naphthylamines (III). com- Component c) may additionally comprise mixtures of two or more of the arylamines (I), (II) and (III).

Preferably, mixtures of at least two different arylamines are part of component c).

Component c) may comprise a mono- or polysubstituted triazole.

In one embodiment, the substituted triazole is selected from alkyl- and / or aryl-substituted triazoles, preferably Ci-Ci2-alkyl and / or C6-Ci8-aryl-substituted 1, 2,3-triazoles and 1, 2,4- triazoles.

Ci-Ci2-alkyl are linear, branched or cyclic alkyl radicals having 1 to 12 carbon atoms to understand. By C 6 -C 18 aryl are aromatic radicals having 6 to 18 carbon atoms, e.g. mononuclear aromatic radicals or two or more nuclear aromatic radicals which may be fused or bridged by a chemical compound or a Ci- C6-alkyl bridge to understand.

Examples of monosubstituted 1,2,4-triazoles are 1-alkyl or aryl-substituted-1H-1, 2,4-triazoles, 3-alkyl or aryl-substituted-1H-triazoles or 4-alkyl or aryl substituted-4H-1, 2,4-triazoles. Examples of di-substituted 1,2,4-triazoles are 1,3-alkyl and / or aryl-disubstituted-1H-1, 2,4-triazoles, 1,5-alkyl and / or aryl-disubstituted-1H- 1, 2,4-triazoles, 3,4-alkyl and / or aryl-disubstituted-4H-1, 2,4-triazoles or 3,5-alkyl and / or aryl-disubstituted-s-triazoles. Examples of triply substituted 1,2,4-triazoles are 1,3,5-alkyl and / or aryl-trisubstituted-1H-1, 2,4-triazoles or 3,4,5-alkyl and / or aryl-trisubstituted -4H-1, 2,4-triazoles.

Examples of monosubstituted 1,2,3-triazoles are 1-alkyl or aryl-substituted-1H-1,2,3-triazoles or 2-alkyl or aryl-substituted-2H-1,2,3-triazoles. Examples of di-substituted 1,2,3-triazoles are 1,4-alkyl and / or aryl-disubstituted-1H-1,2,3-triazoles or 2,4-alkyl and / or aryl-disubstituted-2H -1,2,3-triazoles. Examples of triply substituted 1,2,3-triazoles are 1, 4,5-alkyl and / or aryl-trisubstituted-2H-1,2,3-triazoles or 2,4,5-alkyl and / or aryl-trisubstituted 1 H-1,2,3-triazoles. Suitable representatives of component c) are commercially available.

In a further embodiment, the composition according to the invention additionally comprises a defoamer. The antifoam may be used, for example, in an amount of 0.001 to 0.1% by weight, preferably 0.005 to 0.05% by weight, based on the total composition of the composition according to the invention, be included in the composition.

Suitable defoamers which are suitable as an additive to the composition of the invention are homopolymers of (meth) -Ci-Ci8-alkyl acrylates, copolymers of at least two (meth) -Ci-Ci8-alkyl acrylates or mixtures thereof in question.

In one embodiment, the defoamers used are homopolymers of (meth) -Ci-Cs-alkyl acrylates, copolymers of at least two (meth) -Ci-C8-alkyl acrylates or mixtures thereof. Alkyl stands for linear or branched alkyl groups, such as methyl, ethyl, propyl, n-butyl, isobutyl, pentyl, hexyl, 2-ethylhexyl, heptyl or octyl groups. Preference is given to the methyl, ethyl, n-butyl and 2-ethylhexyl groups. The polymers may also contain other monomers incorporated, such as (meth) acrylic acid, (meth) acrylamide, hydroxy-C 2 -C 6 -alkyl (meth) acrylate.

In a preferred embodiment, copolymers of at least two (meth) -Ci-C8-alkyl acrylates are used as antifoams. An example of such defoamers are copolymers of n-butyl acrylate and / or 2-ethylhexyl acrylate and methyl acrylate and / or ethyl acrylate. In one embodiment, the defoamer is substantially free of silicone. Substantially silicone-free means that, based on the total mass of the defoamer, less than 1% by weight, preferably 0% by weight, of silicones is contained in the defoamer. Suitable defoamers are commercially available.

In a further embodiment, the composition according to the invention additionally comprises an extreme pressure agent. The high pressure additive can be contained in the composition, for example, in an amount of 0.001 to 0.1 wt .-%, preferably 0.002 to 0.03 wt .-%, based on the total mass of the composition according to the invention.

High pressure additives useful as an additive to the composition of the present invention are generally oil soluble. Suitable high-pressure additives are selected, for example, from oil-soluble organic esters of phosphoric acid, oil-soluble organic esters of phosphinic acid, oil-soluble organic esters of phosphonic acid, oil-soluble organic esters of sulfuric acid, oil-soluble organic esters of sulfurous acid, oil-soluble organic esters of sulfonic acid, amine salts of hydroxy -substituted phosphetanes, amine salts of hydroxy-substituted Thiophosphetanen, amine salts of partial esters of phosphorous acid and amine salts of partial esters of thiophosphorigenic acid.

Phosphoric acid, phosphinic acid, phosphonic acid, sulfuric acid, sulfurous acid and sulfonic acid are, for example, with alcohols with e.g. 4 to 18 carbon atoms esterified.

Examples of amine salts of hydroxy-substituted phosphetanes, hydroxy-substituted thiophosphetanes, partial esters of phosphorous acid and partial esters of thiophosphorous acid are the C 6 -C 12 -alkylamine salts thereof, preferably the octylamine salts thereof.

Partial esters of phosphorous acid and thiophosphorous acid are not completely esterified at all OH groups of the underlying free acids. The partial esterification of the phosphorous acid and the thiophosphorous acid can be carried out, for example, with alcohols with e.g. 4 to 18 carbon atoms take place.

In a preferred embodiment, the composition of the invention comprises a high pressure additive selected from alkyl thiophosphate esters.

Examples of alkyl thiophosphate esters are C 1 -C 6 -alkyl esters of thiophosphoric acid. The alkylthiophosphoric acid esters may have three identical alkyl radicals, two or three different from one another. Suitable high pressure additives are commercially available.

In one embodiment, the lubricant composition of the invention comprises a high pressure additive or a mixture of two or more high pressure additives different from each other.

In a preferred embodiment of the invention, the lubricant composition comprises at least one defoamer and at least one high pressure additive, wherein the defoamer and the high pressure additive are as defined above. In a further embodiment, the lubricant composition according to the invention comprises a) the base oil having a viscosity of 30 to 70 mm ² / s at 40 ° C., in particular a hydrocracker oil having a viscosity of 40 to 50 mm ² / s at 40 ° C., b) 0.05 to 1, 5 wt .-%, in particular 0.05 to 0.9 wt .-%, of the hydrolysis protection component, c) 0.05 to 2 wt .-%, in particular 0.05 to 1, 0 D) optionally from 0.001 to 0.1% by weight, in particular from 0.005 to 0.05% by weight, of an antifoam, and e) optionally from 0.001 to 0.1% by weight of the rust and oxidation inhibitor; .-%, in particular 0.002 to 0.03 wt .-%, of a high pressure additive, each based on the total weight of the composition, wherein the components a) to e) are as defined above.

In a further embodiment, the lubricant compositions according to the invention contain no succinic acid ester and / or no aspartic acid derivative, in particular no aspartic acid acylated on the nitrogen atom or an ester thereof. The succinic esters correspond to the formula

wherein Xi and X2 independently of one another are H or alkyl, alkenyl or hydroxyalkyl having 3 to 6 carbon atoms and X3 has 1 to 30 carbon atoms and is alkyl, alkenyl, alkyl having ether bonds or hydroxyalkyl,

the aspartic acid derivatives correspond to the formula

wherein Xi and X2 are H, alkyl or hydroxyalkyl having 3 to 6 carbon atoms, X3 is alkyl having 1 to 30 carbon atoms, alkyl having ether bonds or hydroxyalkyl and X ₄ for saturated or unsaturated carboxylic acid groups having radicals, in particular alkyl or alkenyl radicals, with 1 to 30 carbon atoms, alkenyl or hydroxyalkyl. The lubricant compositions according to the invention have the advantage of high resistance to chlorine or chlorine-containing products. In particular, the lubricant compositions according to the invention are resistant to chlorine contents of more than 50 ppm up to 2000 ppm. Thus, the lubricant compositions according to the invention for the lubrication of turbines or (turbo) compressors, which serve for the compression of chlorine and / or chlorine-containing products are suitable.

The invention further relates to the use of the lubricant compositions according to the invention for the lubrication of turbines or (turbo) compressors.

The lubricant compositions according to the invention are particularly suitable for use in the lubrication of turbines or (turbo) compressors, which serve for the compression of chlorine and / or chlorine-containing products.

The lubricant compositions of the invention are prepared, for example, by mixing (using a suitable stirrer) the above components in a suitable device, e.g. a mixing kettle, received. Applying the compositions to the parts to be lubricated, e.g. Feedthroughs for strokes of a turbine or a (turbo) compressor can be done, for example, by spraying and / or spreading of the compositions on said parts. The following examples serve to illustrate the invention without limiting it.

Example 1 The following components were charged in the proportions indicated in a mixing vessel and mixed therein to form a lubricant composition. a) 87.5% by weight, based on the total mass of the composition, of a hydraulic oil with a viscosity of 40 to 55 mm ² / s at 40 ° C .; b) 1 1, 6 wt .-% of a formulation, based on the total mass of the composition containing about 4 wt .-% of at least one epoxidized C11-C22- Fatty acid C 1 -C 12 -alkyl ester based on rapeseed oil with a total oxygen content of about 7% by weight (remainder rapeseed oil); c) 0.8% by weight, based on the total weight of the composition, of a formulation containing about 15% by weight of 2-tert-butylphenol and phenyl-a-naphthylamine

(Weight ratio 2: 1) contains (balance oil); and d) 0, 1 wt .-%, based on the total weight of the composition, of at least one polymeric defoamer (balance oil).

Determination of corrosion protection properties and resistance to chlorine:

To determine the anti-corrosive properties, a standard method for the determination of corrosion according to DI N ISO 7120 was modified in the lubricant industry. Instead of water and oil, a 2000 ppm chlorine offset lubricant composition according to Example 1 was presented as a test liquid and the test specimens used for 24 hours at 60 ° C with stirring (1000 rev / min) left. The specimens used were both the specimens described in DIN ISO 7120 made of steel, and of white metal, which is usually used as a bearing metal in compressors. After 24 hours, the stirring was stopped and the test pieces were taken out of the test liquid. After draining, the test piece was rinsed with cleaning solution and the degree of corrosion was assessed according to the DI N ISO 7120 classification. A specimen is considered rusted if any rust or rust streak is visible. Are both specimens stainless, the

Lubricant composition passed the test.

Stainless: No rust or rust marks visible

Light rust: Not more than 6 rust spots of 1 mm diameter or less. Moderate rust: More rust than light rust, but less than 5% of rust

Surface of the test specimen covered

Strong rust: The rust covers more than 5% of the surface of the specimens.

Evaluation of the experiments:

It has been found that with the lubricant composition according to Example 1, even at a concentration of 2000 ppm chlorine in the oil no corrosion is observed, ie the lubricant composition has passed the test. In addition, the lubricant composition was neither discolored nor precipitated. The lubricant composition has thus proved to be resistant even to a chlorine content of 2000 ppm.

Claims

claims

A lubricant composition comprising (a) a base oil having a viscosity of 30 to 70 mm ² / s at 40 ° C,

(B) a hydrolysis protective component comprising at least one epoxidized Cn-C22 fatty acid Ci-Ci2-alkyl ester and / or at least one epoxidized Cn-C22 fatty acid glyceride, having an epoxy oxygen content of 1 to 10 wt .-%, based on the total mass epoxidized fatty acid C 1 -C 12 -alkyl ester and / or epoxidized fatty acid glyceride, and

(C) a rust and oxidation inhibitor selected from at least one single or multiple Ci-Ci2-alkyl-substituted phenol, at least one arylamine and at least one mono- or polysubstituted triazole and mixtures of two or more of these components.

2. Composition according to claim 1, containing 0.05 to 1, 5 wt .-% of component (b).

3. Composition according to claim 1 or 2, containing 0.05 to 2 wt .-% of component (c), each based on the total weight of the composition.

4. The composition according to any one of the preceding claims, wherein the

Grundolkomponente has a viscosity index of> 120.

5. A composition according to any one of the preceding claims, wherein the

Grundolkomponente (a) comprises at least one hydrocrack oil.

6. The composition according to any one of the preceding claims, wherein the component (a) additionally at least one other Grundolkomponente selected from mineral oils, natural oils, hydrogenated polyolefin oils, poly-α-olefins, alkyl esters of dicarboxylic acids, esters of dicarboxylic acids with a polyglycol and a C6 -Ci8-alcohol, C6-Ci8-alkyl esters of carboxylic acids, C6-C18-

Alkyl esters of phosphorous acids and hydrofluorocarbon oils. A composition according to any one of the preceding claims wherein the fatty acid of the fatty acid alkyl esters and fatty acid glycerides of component (b) is selected from soybean oil, thistle oil, grapeseed oil, mustard oil, coriander oil, linseed oil, rapeseed oil, borage oil, tung oil, evening primrose oil, walnut oil, hemp oil, sunflower oil, olive oil , Palm oil, peanut oil, coconut oil, castor oil or fish oil based fatty acids.

8. The composition according to any one of the preceding claims, wherein the Cn-C22 fatty acid Ci-Ci2-alkyl ester is a Cn-C22 fatty acid C6-Cio-alkyl ester.

A composition according to any one of the preceding claims, wherein component (c) comprises:

i) at least one mono- or poly-C 1 -C 12 -alkyl-substituted phenol and at least one arylamine or at least one singly or multiply substituted triazole;

ii) at least one arylamine and at least one singly or multiply substituted triazole; or

iii) at least one singly or multiply Ci-Ci2-alkyl-substituted phenol and at least one arylamine and at least one singly or multiply substituted triazole.

A composition according to any one of the preceding claims, wherein the C 1 -C 12 alkyl-substituted phenol of component (c) is selected from 2,6-di-tert-butylphenol, 4-methyl-2,6-di-tert-butylphenol, 2,4,6-tri-tert-butylphenol, 2-tert-butylphenol, 2,6-diisopropylphenol, 2-methyl-6-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol and 4-ethyl 2,6-di-tert-butyl phenol.

A composition according to any one of the preceding claims wherein the arylamine of component (c) is selected from alkyldiphenylamines of general formula (I)

where R ¹ , R ² , R ³ and R ^{4 are} identical or different and denote hydrogen or C 1 -C 18 -alkyl, phenyl-a-naphthylamines of the general formula (II) where R ^{5 is} hydrogen or C 1 -C 6 -alkyl and phenyl-β-naphthylamines of the general formula (III)

(III)

wherein R ^{6 is} hydrogen or Ci-Cis-alkyl.

12. The composition according to any one of the preceding claims, wherein the substituted triazole is selected from 1, 2,3-triazoles and 1, 2,4-triazoles, which are substituted by Ci-Ci2-alkyl and / or C6-Ci8-aryl.

Composition according to one of the preceding claims, additionally comprising a defoamer.

14. The composition of claim 13, wherein the defoamer is selected from homopolymers of (meth) -Ci-Ci8-alkyl acrylates, copolymers of at least two (meth) -Ci-Ci8-alkyl acrylates or mixtures thereof.

A composition according to claim 13 or 14 comprising from 0.001 to 0.1% by weight of the defoamer, based on the total weight of the composition.

16. Composition according to one of the preceding claims additionally comprising at least one high pressure additive selected from oil-soluble organic esters of phosphoric acid, oil-soluble organic esters of phosphonic acid, oil-soluble organic esters of phosphonic acid, oil-soluble organic esters of sulfuric acid, oil-soluble organic esters of sulfuric acid. acid, oil-soluble organic esters of sulfonic acid, amine salts of hydroxy-substituted phosphetanes, amine salts of hydroxy-substituted thiophosphetanes, amine salts of partial esters of phosphorous acid and amine salts of partial esters of thiophosphoric acid.

A composition according to claim 16, wherein the high pressure additive is selected from alkyl thiophosphate esters.

A composition according to claim 16 or 17 comprising from 0.001 to 0.1% by weight of the high pressure additive, based on the total weight of the composition.

Composition according to one of the preceding claims, comprising a) the base oil having a viscosity of 30 to 70 mm ² / s at 40 ° C, in particular a hydrocracking oil having a viscosity of 40 to 50 mm ² / s at 40 ° C, b) 0 , 05 to 1, 5 wt .-%, in particular 0.05 to 0.9 wt .-%, of the hydrolysis protection component, c) 0.05 to 2 wt .-%, in particular 0.05 to 1, 0 wt. d) optionally from 0.001 to 0.1% by weight, in particular from 0.005 to 0.05% by weight, of an antifoam, and e) optionally from 0.001 to 0.1% by weight , in particular 0.002 to 0.03% by weight, of a high pressure additive, in each case based on the total weight of the composition.

A composition according to any one of the preceding claims, which contains substantially no succinic acid ester. 21. Use of the lubricant composition according to any one of the preceding claims for the lubrication of turbines or (turbo) compressors. 22. Use of the lubricant composition according to claim 20 for the lubrication of turbines or (turbo) compressors, which serve for the compression of chlorine and / or chlorine-containing products.