RU2439137C1 - Additives composition for turbine oil - Google Patents

Abstract

FIELD: machine-building industry.

SUBSTANCE: additives composition for turbine oil on the basis of petroleum oil with cinematic viscosity at 50°C 20-23 mm²/s contains, wt %: acid ether of alkelin succinic acid - 0.96-1.54; nitrogen containing block -copolymer of ethylene and propylene oxides - 0.96-3.59; alkyltoluene alkyl aminotriazol - 0.96-2.56; 2.6- dialkylphenol-p-ethylalkilat - 9.6-25.64; product of oleic acid and diethanolamine borate condensation - 9.62-10.26; hydroxyl containing co-polymer of ethylene and propylene oxide - 0.96-5.13; 2,b - di-tret.butyl-4-methylphenol - to 100.

EFFECT: improved de-emulsifying, anti-oxidant and anti-frication properties.

2 tbl, 11 ex

Description

The invention relates to compositions of turbine oils, in particular additive compositions added to oil. Turbine oils are used in oil systems for the lubrication of gas, steam turbines, turbochargers, as a hydraulic fluid in the control systems of these units.

Known turbine oil (US No. 3785975, 1974) with a composition of additives: the antioxidant 2,6-di-tert-butyl-4-methylphenol and anti-rust additive.

Turbine oil is known (SU No. 288213, 1970), which includes an additive composition containing polysiloxane liquid PMS-200A, pentadecylate acid ester, diproxamine-157, ionol.

A known composition of additives for turbine oil (SU No. 810768, 1981), comprising: 2,6-di-tert-butyl-4-methylphenol, quinizarin, alkenyl succinic acid ester, polyoxypropylene glycol ether of ethylene diamine or propylene glycol or alkyl phenol, polymethylsiloxane.

Known additive composition for turbine oil (RU No. 2058376, 1996), which includes additives: 2,6-di-tert-butyl-4-methylphenol, acid ester of pentadecylate acids, 1- (diethylaminomethyl) benzotriazole, nitrogen-containing block copolymer ethylene and propylene oxides.

A known additive composition for turbine oil (RU No. 2144943, 2000) containing an acid ester of alkenyl succinic acid, 1- (diethylaminomethyl) benzotriazole, 2,6-di-tert-butyl-4-methylphenol, 3.3 ^/ , 5.5 ^/ -tetra-tert-butyl-4,4 ^/ -dioxidiphenylmethane.

The disadvantages of the above compositions are that the latter do not provide the necessary level of operational performance of turbine oils, in particular, the latter have low chemical stability and lubricity.

Closest to the proposed composition is a composition for turbine oil Tp-22s (grade 1) according to TU 38.101821-2001 (RU No. 2114157 of 02/05/97. Bull. Inventory No. 18, 1998) of the following composition: agidol-1 (Ionol ), alkenyl succinic acid ester (additive B 15/41), a nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine-157) and alkyltoluenealkylaminotriazole (Irgamet 39). The disadvantages of the known additive composition are that it does not provide high de-emulsifying, antioxidant and antifriction properties of turbine oil.

The objective of the invention is to create a composition of additives for turbine oil, providing improved oil quality.

This object is achieved by creating a composition of additives for turbine oil based on petroleum oil with a kinematic viscosity at 50 ° C of 20-23 mm ² / s, containing 2,6-di-tert-butyl-4-methylphenol, an acid ester of alkenyl succinic acid, a nitrogen-containing block a copolymer of ethylene and propylene oxides, alkyltoluenealkylamino-triazole, which according to the invention further comprises 2,6-dialkylphenol-p-ethylalkylate, the condensation product of oleic acid with diethanol borate and a hydroxyl-containing copolymer of ethylene and propylene oxides in the wake following ratio, wt.%:

alkenyl succinic acid ester 0.96-1.54 nitrogen block copolymer ethylene and propylene oxides 0.96-3.59 alkyltoluenealkylaminotriazole 0.96-2.56 2,6-dialkylphenol-p-ethylalkylate 9.62-25.64 oleic acid condensation product with diethanolamine borate 9.62-10.26

hydroxyl-containing oxide copolymer

ethylene and propylene 0.96-5.13 2,6-di-tert-butyl-4-methylphenol up to 100.

The technical result achieved in this case is that this composition provides an improvement in the demulsifying and antioxidant properties of turbine oil. In addition, the antifriction properties of turbine oil are also enhanced.

The following is a description of the additives used:

- 2,6-di-tert-butyl-4-methylphenol (Ionol) - is produced according to TU 38.5901237-90, used as an antioxidant in oils, fuels and other products. Temperature: melting 69.5-70, crystallization 69 ° C;

- alkenyl succinic acid ester (anti-rust additive B-15/41) is produced according to TU 6-14-866-86, used in oils. It is a liquid from light yellow to brown in color with an acid number of 180-205 mg KOH / g;

- nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine-157) - is produced according to TU 6-14-614-76, used as a demulsifier in oils and oils. The nitrogen content is 0.50-0.55%, the hydrogen index is not less than 10.5, the ash content is 0.5%;

- alkyltoluenealkylaminotriazole (Irgamet 39) - metal deactivator, produced by Ciba according to the specification PS-184210 Version 6. Kinematic viscosity at 40 ° С 70-90 mm ² / s, total alkaline number 138-155 mg KOH / g, n _d ²⁰ 1,503 -1.513, density at 20 ° C 940-960 kg / m ³ ;

- 2,6-dialkylphenol-p-ethylalkylate (Irganox L 135) is a high molecular weight alkylphenol type antioxidant produced by Ciba according to specification PS-193. Kinematic viscosity at 40 ° C 95-150 mm ² / s, acid number less than 10 mg KOH / g, n _d ²⁰ 1.493-1.499, density at 20 ° C 950-990 kg / m ³ .

The condensation product of oleic acid with diethanolamine borate (Telaz) with a molecular weight (cryoscopy) of 380, content (wt.%) Of C - 67.3, N - 10.7, N - 3.6, B - 2.0, the rest - oxygen, the amine number is 46 mg HCl / g. To obtain a condensation product, 400 g (1.4 M) of oleic acid, 315 g (3.0 M) of diethanolamine and 62 g (1.0 M) of boric acid are charged into a reaction vessel equipped with a stirrer and a thermometer. The temperature rises to 200-220 ° C. The reaction mass is stirred until the water evolution ceases. 5 g of 1,2,3-benzotriazole are added to 200 g of the obtained condensate at 140 ° C, and the mixture is stirred until a clear solution is obtained. The resulting product with an amine number of 46 mg HCl / g was tested for solubility in mineral oil;

- hydroxyl-containing copolymer of ethylene oxide and propylene (Neftenol BS, grade B-1) with a density at 20 ° C 1030-1040 kg / m ³ , a cloud point of 2% solution in distilled water 39-44 ° C, hydroxyl number 71.0- 75.0 mg KOH / g, kinematic viscosity at 40 ° C 200.0-240.0 mm ² / s.

Turbine oil is prepared by mixing at 20-40 ° C oil with a kinematic viscosity at 50 ° C 20-23 mm ² / s with a composition of additives taken in the above concentrations.

Table 1 shows the composition of the additive composition for turbine oil.

The additive composition is introduced into the base oil - petroleum oil with a kinematic viscosity at 50 ° C of 20-23 mm ² / s in an amount of 1.04-1.95 wt.%.

Prepare samples of turbine oils with a composition of additives according to examples 1-11 (table 1).

The composition of these samples is presented in table 2. These compositions are tested to determine the time of demulsification (τ _d ) according to GOST 12068, stability against oxidation according to GOST 981 with an estimate of the acid number (r.h.), the mass fraction of sediment and volatile acids after oxidation, pour point (T _c ) according to GOST 20287, lubricity according to GOST 9490 and density at 15 ° C (ρ ₁₅ ) according to GOST 51069.

The results of comparative tests of samples of turbine oils with various concentrations of additives are presented in table 3.

Based on the obtained test results, the optimal concentration limits of the additives in the composition are selected.

From the table it follows that a significant improvement is achieved in the operational performance of turbine oil, namely, the demulsifying, antioxidant and antifriction properties of turbine oil.

So, from the table it follows that the demulsification time for Tp-22s turbine oil (grade 1) is 120 s, and for turbine oil samples according to examples 2-5 (table 1 and 2), the demulsification time is reduced to 40 s, i.e. decreases by 3.0 times. Turbine oil with the described additive composition has higher antioxidant and antifriction properties. So, during oxidation according to GOST 981, the performance of turbine oil - the acid number decreases, virtually no precipitate and no volatile acids are released. The lubricating properties of turbine oil are also improved.

The deaeration time is also determined, s according to GOST 12068, corrosion on steel plates, g / m ² according to СО 34.43.204-01, pour point (Т _з ) according to GOST 20287, lubricity according to GOST 9490 - wear spot diameter, mm at load 196 N and density at 15 ° С, kg / m ³ according to GOST 51069. So, for turbine oil of the composition according to example 3 in comparison with the well-known Tp-22s oil (grade 1), the deaeration time decreases from 280 s to 90 s., T .e. 3.1 times, there is no corrosion on steel plates (as well as for well-known oil), the pour point does not change and is minus 22 ° C, the diameter of the wear spot decreases by 1.2 times, the density does not change and is 874 kg / m ³ .

The effect of the introduction of the additive composition - increasing the deaeration properties, antioxidant stability and lubricity of turbine oil - is synergistic and is observed only at certain concentrations of additives.

Turbine oil containing these components in amounts that go beyond the specified concentrations does not have the necessary quality characteristics.

The lower limit of additive concentrations of 2,6-dialkylphenol-p-ethylalkylate (Irganox L 135), the product of the condensation of oleic acid with diethanolamine borate and a hydroxyl-containing copolymer of ethylene and propylene oxides is determined by the possibility of achieving a minimum demulsification time of 40 s, maximum oxidative stability - the acid number changes minimum practically no precipitate is formed and volatile acids are not released during oxidation, and the diameter of the wear spot decreases from 1.99 to 0.55 mm. The upper limit is determined by the demulsifying, antioxidant and lubricating properties of turbine oil, which practically do not change with a further increase in additive concentrations.

The resulting technical effect - improving the demulsifying properties of turbine oil reduces its loss with separated water condensate, increasing antioxidant properties leads to an increase in the service life of turbine oil, increasing the antifriction properties of turbine oil reduces the wear of equipment parts.

Improving the operational properties of turbine oil reduces the cost of operating equipment.

Table 1 The composition of the additive No. p / p Name of components Composition, wt.% one 2 3 four 5 6 7 8 9 10 eleven Famous composition one. _Alkenyl succinic acid ester ( _Additive B _15/41 ) 0.99 0.96 1.43 1,54 1.92 1.09 1.00 0.93 0.87 0.77 0.71 2.22 2. Nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine 157 additive) 0.99 0.96 2.88 3,59 3.85 2.17 2.01 1.87 1.75 1,54 1.42 3.33 3. Alkyltoluenealkylaminotriazole (additive Irgament 39) 0.99 0.96 2.16 2,56 2.88 1,63 1.51 1.40 1.31 3.09 3.56 5.56 four. 2,6-dialkylphenol-p-ethylalkylate (additive Irganox L135) 8.83 9.62 14,4 25.64 19.23 27.18 30.15 32.71 34.94 38.61 39.15 - 5. The condensation product of oleic acid to you with diethanolamine borate (additive Telaz) 9.93 9.62 10.80 10.26 12.02 16.30 17.59 18.69 19.65 19.31 21.35 - 6. Hydroxyl-containing copolymer of ethylene and propylene oxides (additive Neftenol BS) 0.99 0.96 3.60 5.13 7.21 2.71 2,51 2,34 2.18 1.93 1.78 - 7. 2,6-di-tert-butyl-4-methylphenol (Ionol additive) Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100

table 2 Turbine Oil Composition No. p / p Name of components Composition, wt.% one 2 3 four 5 6 7 8 9 10 eleven Famous Turbine Oil * one. 2,6-di-tert-butyl-4-methylphenol (Ionol additive) 0.7 0.8 0.9 1,0 1,1 0.9 0.9 0.9 0.9 0.9 0.9 0.8 2. _Alkenyl succinic acid ester ( _Additive B _15/41 ) 0.009 0.01 0.02 0,03 0.04 0.02 0.02 0.02 0.02 0.02 0.02 0.02 3. Nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine 157 additive) 0.009 0.01 0.04 0,07 0.08 0.04 0.04 0.04 0.04 0.04 0.04 0,03 four. Alkyltoluenealkylaminotriazole (additive Irgament 39) 0.009 0.01 0,03 0.05 0.06 0,03 0,03 0,03 0,03 0.08 0.10 0.05 5. 2,6-dialkylphenol-p-ethylalkylate (additive Irganox L135) 0.08 0.10 0.20 0.50 0.40 0.50 0.60 0.70 0.80 1.00 1.10 - 6. The condensation product of oleic acid to you with diethanolamine borate (additive Telaz) 0.09 0.10 0.15 0.20 0.25 0.10 0.30 0.40 0.45 0.50 0.60 - 7. Hydroxyl-containing copolymer of ethylene and propylene oxides (additive Neftenol BS) 0.009 0.01 0.05 0.10 0.15 0.05 0.05 0.05 0.05 0.05 0.05 - 8. Kinematic viscosity oil at 50 ° C 20-23 cSt Up to 100 * - Tp-22s oil (grade 1)

Table 3 Turbine oil performance No. p / p Indicators The values of the examples (table 1) one 2 3 four 5 6 7 8 9 10 eleven Famous Turbine Oil * one. Stability against oxidation at 150 ° C, 16 h and an oxygen consumption of 3 dm ³ / h: - mass fraction of sediment, wt.% 0.007 0.001 0.001 0.001 0.001 0.006 0.006 0.006 0.007 0.007 0.007 0.007 - acid number, mg KOH / g 0.12 0.05 0.05 0.05 0.05 0.10 0.10 0.10 0.12 0.12 0.12 0.12 - volatile acids mg KOH / g. 0,112 0.004 0.004 0.004 0.004 0.008 0.008 0.009 0.009 0.009 0.009 0,112 2. Lubricity (CWM): - diameter of the wear spot, mm at a load of 63 kgf 0.67 0.55 0.55 0.55 0.55 0.59 0.59 0.59 0.65 0.65 0.67 0.67 3. The time of demulsification, s 120 40 40 40 40 117 117 120 118 118 118 120 * - Tp-22s oil (grade 1), the acid number of the Tp-22s oil (grade 1) is 0.04 mg KOH / g

Claims (1)

Additive composition for kinematic viscosity oil-based turbine oil at 50 ° C 20-23 mm ² / s, containing 2,6-di-tert-butyl-4-methylphenol, alkenyl succinic acid ester, nitrogen-containing ethylene oxide block copolymer and propylene, alkyltoluenealkylaminotriazole, characterized in that it further comprises 2,6-dialkylphenol-p-ethylalkylate, the condensation product of oleic acid with diethanolamine borate and a hydroxyl-containing copolymer of ethylene and propylene oxides in the following ratio, wt.%:
alkenyl succinic acid ester 0.96-1.54 nitrogen block copolymer ethylene and propylene oxides 0.96-3.59 alkyltoluenealkylaminotriazole 0.96-2.56 2,6-dialkylphenol-p-ethylalkylate 9.62-25.64 oleic acid condensation product with diethanolamine borate 9.62-10.26 hydroxyl-containing oxide copolymer ethylene and propylene 0.96-5.13 2,6-di-tert-butyl-4-methylphenol up to 100