RU2451061C2 - Composition of turbine oil additive - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention can be used in turbine oil for lubricating gas, steam and water turbines, turbo-compressors, as hydraulic fluids in control systems of said assemblies. The composition of the turbine oil additive contains the following, wt %: acid ester of alkenyl succinic acid 1.04-1.57; nitrogen-containing block-copolymer of ethylene and propylene oxides 1.04-3.68; alkyl toluene alkyl aminotriazole 1.04-2.63; 2,6-dialkylphenol-p-ethylalkylate 10.42-26.32; alkylthiophosphate ester 1.04-2.63; mixture of imidazolines based on plant organic acids and amines 1.04-5.26; hydroxyl-containing copolymer of ethylene and propylene oxides 1.04-5.26; 2,6-di-tert-butyl-4-methylphenol - 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 first thermally treated at 30-90°C for 0.5-2 hours.

EFFECT: improved demulsifying and anticorrosion properties.

4 tbl, 11 ex

Description

The invention relates to turbine oils, in particular additive compositions in their composition. Turbine oils are used in hydraulic turbocharger oil systems as a hydraulic fluid.

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 additive composition 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, pentadecylate acid ester, 1- (diethylaminomethyl) benzotriazole, nitrogen-containing block copolymer oxides of ethylene and propylene.

A known composition of additives 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'-dioxiphenylmethane.

The disadvantages of the above compositions are that the latter do not provide the necessary level of demulsifying and anticorrosive properties of turbine oil, and also do not improve the chemical stability and lubricity of the oil.

Closest to the proposed composition is a composition for turbine oil Tp-22 s (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), an acid ester of alkenyl succinic acid (additive B 15/41), a nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine -157) and alkyltoluenolalkylaminotriazole (Irgamet 39).

The disadvantages of the known additive composition are that it does not provide a high level of antioxidant, anti-corrosion, anti-wear and demulsifying properties of turbine oil.

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

The problem 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 alkenylate acid, a nitrogen-containing block a copolymer of ethylene and propylene oxides, alkyltoluenealkylamino-triazole, 2,6-dialkylphenol-p-ethylalkylate, alkylthiophosphate ester, hydroxyl-containing copolymer of ethylene and propylene oxides, a mixture of imidazolines based on organic acids of plant origin and amines in the following co wearing components, wt.%:

alkenyl succinic acid ester 1.04-1.57 nitrogen block copolymer ethylene and propylene oxides 1.04-3.68 alkyltoluenealkylaminotriazole 1.04-2.63 2,6-dialkylphenol-p-ethylalkylate 10.42-26.32 alkyl thiophosphate ester 1.04-2.63 a mixture of imidazolines based organic vegetable acids origin and amines 1.04-5.26 hydroxyl-containing copolymer ethylene and propylene oxides 1.04-5.26 2,6-di-tert-butyl-4-methylphenol up to 100

wherein the additive composition 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 previously heat-treated at a temperature of 30-90 ° C for 0.5-2 hours

The technical result achieved in this case is that this composition improves the demulsifying and anticorrosive properties of turbine oil, and also further enhances the antioxidant and antiwear properties of the described oil.

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, it is 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 pH 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, 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 PS-193 specification. 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 ;

- alkylthiophosphate ester (Hitec 511T) is produced by Afton Chemical. Liquid from orange to yellow, kinematic viscosity at 40 ° C 95 mm ² / s, acid number no more than 175 mg KOH / g, n _d ²⁰ no more than 1,550, density at 20 ° C no more than 1150, autoignition temperature 390 ° C , flashes in a closed crucible 95 ° С (Pensky-Martens device), phosphorus content 9-10 wt.%, sulfur content 18-20 wt.% (Afton Chemical. HiTEC 511Т Performance Additive. Material safety data sheet. Preparation information, 07.11 .2008; US 2010/0009881, 01/14/2010);

- a mixture of imidazolines based on organic acids of plant origin and amines (Neftekhimeko-1) is produced according to TU 2483-022-17197708-94; mass fraction of the basic substance 40%, acid number not more than 10 mg KOH / 1 g, pour point not higher than -40 ° C, flash point in an open crucible not lower than 30 ° C. The Neftekhimeko-1 inhibitor is obtained as a result of interaction at a temperature of 120-140 ° С of polyethylene polyamines and high molecular weight C ₁₂ -C ₁₈ fatty acids of vegetable (tall oil). (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. Influence of polar solvents on the properties of inhibitors of the NEFTECHIMEKO series);

- hydroxyl-containing copolymer of ethylene and propylene oxides (Neftenol BS, grade B-1) -TU 0258-027-17197708-97 with a density at 20 ° C of 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 kinematic viscosity at 50 ° C 20-23 mm ² / s with a composition of additives taken in the above concentrations. The additive composition is administered in an amount of 0.96-1.90 wt.% Per base oil.

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

Table 2 presents the compositions of turbine oils with a composition of additives in accordance with examples (compositions) 1-11 of table 1.

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.), mass fraction of sediment and volatile acids after oxidation, lubricity according to GOST 9490. Corrosion conditions tests in accordance with 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 to a concentration of about 3000 mg / l.

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

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, in the described additive composition is dictated by the fact that when using an additive composition containing the above additives that have not undergone heat treatment in turbine oil, a positive effect is not observed (presumably due to the interaction of the additives with each other).

Heat treatment of a mixture of these additives blocks the process of reducing the demulsifying and anticorrosive properties of turbine oil and stabilizes these properties.

Mixing of these additives at normal or low temperature + 20-25 ° C does not activate the mixture and 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 speeds up 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.

Table 4 illustrates the effectiveness of using the heat-treated mixture of additives in the described composition: a mixture of imidazolines based on organic acids of plant origin and amines and a hydroxyl-containing copolymer of ethylene and propylene oxides. In this case, the heat treatment of the additive mixture is carried out at 60 ° C for an hour.

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

The described effect of using a heat-treated mixture of additives in the described additive composition is unexpected.

From the data of table 3 it follows that a significant improvement in the operational performance of turbine oil is achieved, namely, demulsifying, anti-corrosion, as well as antioxidant and anti-wear properties of the 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 oil containing the described additive composition, the time of demulsification is reduced to 40 s, i.e. 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 in the composition were selected.

Thus, the lower limit of additive concentrations of 2,6-dialkylphenol-p-ethylalkylate (Irganox L 135), an alkylthiophosphate ester, a hydroxyl-containing copolymer of ethylene and propylene oxides, 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 seconds and the corrosion rate in a hydrogen sulfide-containing medium 1.14 g / m ² h. The upper limit of the concentration of the added additives is determined by the period of time the water is removed from the turbine oil and the corrosion rate ali in the environment of hydrogen sulfide, which practically do not change with a further definite 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 additive composition can improve the performance of turbine oil, in particular demulsifying, anticorrosive, antioxidant and antiwear properties, which leads to an increase in the service life of the 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 Acid Acid Ester ( _Additive B _15/41 ) 0.90 1,04 1,54 1,57 2.07 1.15 1.12 1,11 1.05 0.91 0.85 2.22 2 Nitrogen-containing block copolymer of ethylene and propylene oxides (Diproxamine 157 additive) 0.90 1,04 3.08 3.68 3.63 2,30 2.24 2.22 2.10 1.82 1.71 3.33 3 Alkyltoluenealkylaminotriazole (additive Irgament 39) 9.04 1,04 2,31 2.63 3.11 1.72 1.68 1,67 1,58 3.64 4.27 5.56 four 2,6-dialkylphenol-p-ethylalkylate (additive Irganox L 135) 8.04 10,42 15.38 26.32 20.72 28.74 33.71 38.89 42.10 45.45 47.01 - 5 A mixture of imidazolines based on organic acids of plant origin and amines (additive Neftekhimeko-1) 0.90 1,04 3.08 5.26 5.18 6.32 2.25 2.22 2.10 1.82 1.71 - 6 Hydroxyl-containing copolymer of ethylene and propylene oxides (additive Neftenol BS 0.90 1,04 3.07 5.26 5.18 6.32 6.74 2.22 2.10 1.82 1.71 - brand B-1 7 Alkylthiophosphate ester (Hitec511T) 9.04 1,04 2,31 2.63 3.11 1.72 1.68 1,67 1,58 3.64 4.27 - 8 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 3 The results of comparative tests of samples of turbine oils No. Indicators The values of the examples (compositions) of table 2 p / p one 2 3 four 5 6 7 8 9 10 eleven Tp-22 turbine oil from 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. Lubricity (CWM): the 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. The corrosion rate at 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 4 The effectiveness of using the heat-treated mixture of additives in the described composition: 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 Composition 3 turbine oil obtained using an additive composition containing a mixture of additives without heat treatment Composition 3 turbine oil obtained using an additive composition containing a heat-treated additive mixture (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 The corrosion rate at Art. 3, g / m ² 3.24 3.21 1.14 four Lubricity (CWM): - diameter of the wear spot, mm, at load 63 kgf 1.99 1.98 0.39 - badass index 19.60 19.64 23.30 - critical load, kgf 56 58 63 - welding load, kgf 112 114 118

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, alkylthiophosphate ester, hydroxyl-containing copolymer of ethylene and propylene oxides, a mixture of imidazolines based on organic acids of plant origin and amines in the following regard, wt.%:
alkenyl succinic acid ester 1.04-1.57 nitrogen block copolymer ethylene and propylene oxides 1.04-3.68 alkyltoluenealkylaminotriazole 1.04-2.63 2,6-dialkylphenol-p-ethylalkylate 10.42-26.32 alkyl thiophosphate ester 1.04-2.63 organic imidazoline mixture plant acids and amines 1.04-5.26 hydroxyl-containing copolymer ethylene and propylene oxides 1.04-5.26 2,6-di-tert-butyl-4-methylphenol up to 100,
wherein the additive composition 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 previously heat-treated at a temperature of 30-90 ° C for 0.5-2 hours