RU2451060C2 - Turbine oil - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: turbine oil contains the following in wt %: acid ester of alkenyl succinic acid 0.01-0.03, 2,6-di-tert-butyl-4-methylphenol 0.8-1.0, nitrogen-containing block-copolymer of ethylene and propylene oxides 0.01-0.07, alkyl toluene alkyl aminotriazole 0.01-0.05, 2,6-dialkylphenol-p-ethylalkylate 0.1-0.5, alkylthiophosphate ester 0.01-0.05, hydroxyl-containing copolymer of ethylene and propylene oxides 0.005-0.1, mixture of imidazolines based on plant organic acids and amines 0.01-0.10, petroleum oil with kinematic viscosity at 50°C of 20-23 mm²/s - up to 100. The mixture of imidazolines based on plant organic acids and amines and the hydroxyl-containing copolymer of ethylene and propylene oxides is in form of a mixture which is thermally treated at 30-90°C for 0.5-2 hours.

EFFECT: improved demulsifying and anticorrosion properties of the oil.

3 tbl, 11 ex

Description

The invention relates to compositions of turbine oils used in oil systems for lubricating turbochargers, as a hydraulic fluid in the control systems of these units.

Known turbine oil (US No. 3785975, 1974) containing the antioxidant 2,6-di-tert-butyl-4-methylphenol and an anti-rust additive.

Known turbine oil (SU No. 288213, 1970) composition,% wt .: polysiloxane liquid ПМС-200А - up to 0.005, pentadecylate acid ester - up to 0.02, diproxamine-157 - up to 0.01, ionol - up to 1.00 oil base is the rest.

Known turbine oil (SU No. 810768.1981) composition,% wt .: 2,6-di-tert-butyl-4-methylphenol - 0.2-1.0, quinizarin - 0.01-0.05, acidic ether alkenyl succinic acid - 0.02-0.1, polyoxypropylene glycol ether of ethylene diamine or propylene glycol or alkyl phenol - 0.02-0.2, polymethylsiloxane - 0.003-0.005, petroleum oil - the rest.

Known turbine oil (RU No. 2058376, 1996) of the following composition,% wt .: 2,6-di-tert-butyl-4-methylphenol - 0.2-1.0, acid ester of pentadecylate acid - 0.01-0, 1, 1- (diethylaminomethyl) benzotriazole - 0.01-0.2, mineral oil - up to 100. The oil may contain a nitrogen-containing block copolymer of ethylene and propylene oxides in an amount of 0.01-0.05 wt.%.

Known turbine oil (RU No. 2144943, 2000) of the following composition,% wt .: acid ester of alkenyl succinic acid - 0.01-0.03, 1- (diethylaminomethyl) benzotriazole - 0.01-0.1, 2.6-di tert-butyl-4-methylphenol - up to 1.0; 3.3 ', 5.5'-tetra-tert-butyl-4,4'-dioxiphenylmethane - 0.1-2.0, mineral oil - up to 100.

The oil may contain a demulsifying additive Diproxamine-157 - a nitrogen-containing block copolymer of ethylene oxide and propylene in an amount of 0.01-0.07% wt., And to improve antifoam properties under operating conditions may contain polymethylsiloxane (PMS-200A) in an amount of 0.003- 0.005 wt.%.

The above oils have not enough high demulsifying and anti-corrosion properties, as well as low chemical stability and lubricating ability.

Closest to the proposed oil is Tp-22s turbine oil (grade 1) according to TU 38.101821-2001 (Pat. No. 2114157, 1998) of the following composition,% wt .: agidol-1 (Ionol) - 0.2-0, 8, acidic, alkenyl succinic acid ester (additive B 15/41) - 0.01-0.05, a nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine-157) - 0.01-0.03 and alkyltoluene alkylaminotriazole (Irgamet 39) - 0.005-0.1, petroleum oil - the rest.

The disadvantages of this oil are both unsatisfactory antioxidant, anti-corrosion and anti-wear properties, as well as low demulsifying ability.

The objective of the invention is to improve the properties of turbine oil.

The problem is achieved by creating a turbine oil containing petroleum oil with a kinematic viscosity at 50 ° C of 20-23 mm ² / s, 2,6-di-tert-butyl-4-methylphenol, an acid ester of alkenyl succinic acid, a nitrogen-containing block copolymer of ethylene oxides and propylene, alkyltoluenealkylaminotriazole, which according to the invention further comprises 2,6-dialkylphenol-p-ethylalkylate, alkylthiophosphate ester, a mixture of imidazolines based on organic acids of plant origin and amines, a hydroxyl-containing copolymer of ethylene oxides and propyl at the following component ratio,% wt .:

2,6-di-tert-butyl-4-methylphenol 0.8-1.0 alkenyl succinic acid ester 0.01-0.03 nitrogen block copolymer ethylene and propylene oxides 0.01-0.07 alkyltoluenealkylaminotriazole 0.01-0.05 2,6-dialkylphenol-p-ethylalkylate 0.1-0.5 alkyl thiophosphate ester 0.01-0.05 a mixture of imidazolines based organic vegetable acids origin and amines 0.01-0.10 hydroxyl-containing copolymer ethylene and propylene oxides 0.01-0.1 kinematic oil viscosity at 50 ° С - 20-23 mm ² / s up to 100,

however, turbine oil contains a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides in the form of a mixture heat-treated at a temperature of 30-90 ° C for 0.5-2 hours

The technical result achieved in this case is to improve the demulsifying and anticorrosive properties of turbine oil. In addition, the antioxidant and antiwear properties of the described 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. Temperatures: melting - 69.5-70 ° С, crystallization - 69 ° С;

- 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 at least 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, n _d ²⁰ 1,503-1,513, density at 20 ° С 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 ;

- alkyl thiophosphate ester (Hitec 511T), produced by Afton Chemical. Liquid from orange to yellow, kinematic viscosity at 40 ° C 95 mm ² / s, acid number not more than 175 mg KOH / g, n _d ²⁰ 1,450-1,500, density at 20 ° C 1111 kg / m ³ , autoignition temperature 390 ° С, flashes in a closed crucible 95 ° С (Pensky-Martens device), phosphorus content 9-10% wt., Sulfur content 18-20% wt. (Afton Chemical. HiTEC 511T Performance Additive. Material Safety Data Sheet. Preparation information, 11/7/2008; US 2010/0009881, 01/14/2010);

- a mixture of imidazolines based on organic acids of plant origin and amines (Neftekhimeko-1 inhibitor) is produced according to TU 2483-022-17197708-94 “Neftekhimiko-1 corrosion inhibitor”, mass fraction of the main substance 40%, acid number not more than 10 mg KOH / 1 g, pour point no higher than -40 ° C, flash point in an open crucible not lower than 30 ° C. Obtained by the interaction at a temperature of 120-140 ° C of polyethylene polyamines and high molecular fatty acids C ₁₂ -C ₁₈ vegetable oils (Scientific and technical journal "Environmental Protection in the Oil and Gas Complex", Moscow, 2007, No. 3, p. 18-21, R. S. Magadov, M. A. Silin, N. M. Nikolayeva and others. The effect of polar solvents on the properties of inhibitors of the NEFTECHIMEKO series);

- hydroxyl-containing copolymer of ethylene oxide and propylene - nonionic surfactant (Neftenol BS, grade B-1) - TU 0258-027-17197708-97 with a density at 20 ° C 1030-1040 kg / m ³ , cloud point 2% solution in distilled water 39-44 ° C, hydroxyl number 71.00-75.00 mg KOH / g, kinematic viscosity at 40 ° C 200.00-240.00 mm ² / s.

The described oil is prepared by mixing at 20-40 ° C oil with kinematic viscosity at 50 ° C 20-23 mm ² / s with a composition of additives taken in the above concentrations. In this case, a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides are used as a mixture heat-treated at a temperature of 30-90 ° C for 0.5-2 hours.

Oil samples are prepared according to examples 1-11, the composition of which is shown in table 1, and subjected to tests to determine the demulsification time (τ _d ) according to GOST 12068, stability against oxidation according to GOST 981 with an estimate of the acid number (r.h.), mass fractions of sediment and volatile acids after oxidation, lubricity according to GOST 9490, corrosion rate according to GOST 9.506 (metal plates made of grade 3 steel, temperature 20 ± 2 ° С, time - 6 hours, medium - 3% aqueous NaCl solution saturated with hydrogen sulfide up to concentration of about 3000 mg / l).

The results of comparative tests of samples of turbine oils with various concentrations of additives and known oils are presented in table 2.

The need to use additives: a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides in the form of a mixture heat-treated at a temperature of 30-90 ° C for 0.5-2 hours is dictated by the fact that when used in turbine oil of the above additives that have not undergone heat treatment, a positive effect is not observed (presumably due to the interaction of the additives with each other).

Preliminary heat treatment of a mixture of these additives before introducing them into turbine oil blocks the process of reducing the demulsifying and anticorrosive properties of turbine oil and stabilizes these properties.

The mixing of additives at normal or low temperatures + 20-25 ° C does not activate the mixture and the improvement of demulsifying and anticorrosive properties of turbine oil does not occur.

Mixing the additive composition at 30 ° C, i.e. weak heat treatment for 2 hours, already activates the mixture. Raising the heat treatment temperature to 90 ° C accelerates the activation process and the heat treatment time decreases to 0.5 hours. A temperature below 30 ° C increases the duration of the process, above 90 ° C it can cause thermal degradation of the least stable components of the mixture.

The described effect of using a heat-treated mixture of these additives is unexpected.

Table 3 illustrates the efficiency of using a heat-treated mixture of additives - a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides.

As can be seen from the table, the use of a mixture of the above two additives in a turbine oil without heat treatment under the above conditions does not practically improve the properties of turbine oil. The use of a heat-treated mixture of additives dramatically improves the performance of the oil.

From the data of table 2 it follows that a significant improvement in the operational performance of turbine oil is achieved, namely, demulsifying and anti-corrosion, as well as additional antioxidant and anti-wear properties of the described oil are improved.

So, the time of demulsification (removal of water) for oil Тп-22с (grade 1) is 120 s, and for samples (for example, for sample 3) of the described oil with a composition of additives, including a heat-treated mixture of the above additives, the time of demulsification is reduced to 40 s, those. 3.0 times, the corrosion rate of Art. 3 is reduced by 2.8 times, and the antioxidant stability and antiwear properties of turbine oil are further improved.

Based on the test results obtained, the optimal ranges of additive concentrations were selected.

So, the lower limit of additive concentrations of 2,6-dialkylphenol-p-ethylalkylate (Irganox L 135), an alkylthiophosphate ester, a hydroxyl-containing copolymer of ethylene oxide and propylene, a mixture of imidazolines based on organic acids of plant origin and amines is determined by the possibility of achieving a minimum time for removing water from oil 40 s and a corrosion rate of 1.14 g / m ² h. The upper limit of the concentration of added additives is determined by the time period for removing water from the turbine oil and the corrosion rate of steel, which practically do not change with a further increase in the concentration of additives and, therefore, such an increase becomes economically inexpedient (see data on the composition of 5 tables 1–3).

Thus, the described turbine oil has high performance, in particular demulsifying, anti-corrosion, anti-oxidative and anti-wear properties, which leads to an increase in the service life of the equipment.

Table 1 Turbine Oil Composition No. p / p Name of components Composition,% wt. one 2 3 four 5 6 7 8 9 10 eleven Famous brand TP-22s oil 1 one. 2,6-di-tert-butyl-4-methylphenol (Ionol additive) 0.7 0.8 0.9 1.0 1,0 0.9 0.9 0.9 0.9 0.9 0.9 0.8 2. _Alkenyl Acid 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 0,07 0.04 0.04 0.04 0.04 0.04 0.04 0,03 four. Alkyltoluenealkylamotriazole (additive Irgament 39) 0.09 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. A mixture of imidazolines based on organic acids of plant origin and amines (additive Neftekhimeko-1) 0.009 0.01 0.04 0.10 0.10 0.11 0.04 - 0.04 0.04 0.04 - 7. Hydroxyl-containing copolymer of ethylene and propylene oxides (additive Neftenol BS grade B-1 0.009 0.01 0.04 0.10 0.10 0.11 0.12 0.04 0.04 0.04 0.04 - 8. Hitec 511T Lkylthiophosphate Ether 0.09 0.01 0,03 0.05 0.06 0,03 0,03 0,03 0,03 0.08 0.10 - 9. Kinematic viscosity oil at 50 ° C 20-23 mm ² / s Up to 100.00

table 2 Turbine oil performance No. p / p Indicators The values for examples (compositions) of table 1 one 2 3 four 5 6 7 8 9 10 eleven Famous Tp-22s oil brand 1 one. Stability against oxidation at 150 ° C, 16 h and an oxygen consumption of 3 dm ³ / h: - mass fraction of sediment,% wt. 0.006 0.001 0.001 0.001 0.001 0.001 0.006 0.006 0.007 0.007 0.007 0.006 - acid number, mg KOH / g 0.10 0.05 0.05 0.05 0.05 0.05 0.10 0.10 0.12 0.12 0.12 0.10 - volatile acids mg KOH / g 0.08 0.009 0.009 0.009 0.009 0.04 0.08 0.08 0.09 0.09 0.09 0.08 2. Lubricating ability (ChShM); - diameter of the wear spot, mm, at a load of 63 kgf 1.99 0.39 0.39 0.39 0.39 1.99 1.55 1.99 1.55 1.55 1.99 1.99 - badass index 19.6 23.3 23.3 23.3 23.3 19.6 20.8 19.6 20.8 20.8 19.6 19.6 - critical load, kgf 56 63 63 63 63 56 58 56 58 58 56 56 - welding load, kgf 112 119 119 119 119 112 114 112 114 114 112 112 3. The time of demulsification, s 120 40 40 40 40 118 119 118 119 118 119 120 four. Corrosion rate Art. 3, g / m ² 3.24 1.14 1.14 1.14 1.14 1.18 3.20 3.22 3.24 3.23 3.24 3.24

Table 3 Efficiency of using a heat-treated mixture of additives: a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides No. p / p Indicators Famous turbine oil Turbine oil composition 3, obtained using a mixture of additives without heat treatment Composition 3 turbine oil obtained using a heat-treated mixture of additives (60 ° C, 1 hour) one The time of demulsification, s 120 118 40 2 Stability against oxidation (150 ° C, 16 h, oxygen consumption 3 dm ³ / h): - acid number, mg KOH / g 0.006 0.006 0.001 - sediment,% wt. 0.10 0.11 0.05 - volatile acids, mg KOH / g 0.08 0.09 0.009 3 Corrosion at St.3, g / m ² 3.24 3.21 1.14 four Lubricity (CWM): 1.99 1.98 0.39 - diameter of the wear spot, mm, at a load of 63 kgf - badass index 19.60 19.64 23.30 - critical load, kgf 56 58 63 - welding load, kgf 112 114 118

Claims (1)

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 copolymer of ethylene and propylene oxides and alkyltoluenealkylaminotriazole, characterized in that it further comprises 2,6-dialkylphenol-p-ethylalkylate, an alkylthiophosphate ester, a mixture of imidazolines based on organic acids of plant origin and amines, a hydroxyl-containing copolymer of ethylene oxides and propylene in the following ratio of component s, wt.%:
2,6-di-tert-butyl-4-methylphenol 0.8-1.0 alkenyl succinic acid ester 0.01-0.03 nitrogen block copolymer ethylene and propylene oxides 0.01-0.07 alkyltoluenealkylaminotriazole 0.01-0.05 2,6-dialkylphenol-p-ethylalkylate 0.1-0.5 alkyl thiophosphate ester 0.01-, 05 a mixture of imidazolines based organic vegetable acids origin and amines 0.01-0.10 hydroxyl-containing copolymer ethylene and propylene oxides 0.01-0.1 kinematic oil viscosity at 50 ° С 20-23 mm ² / s up to 100,
in this case, turbine oil contains a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides in the form of a mixture heat-treated at a temperature of 30-90 ° C for 0.5-2 hours