SU565930A1 - Additive for lubricating oils - Google Patents

Description

I

This invention relates to petrochemistry, in particular to formulations of additives that increase the antioxidant stability of lubricating oils.

It is known that additives, such as metal compounds or organic compounds of the amine or phenolic type, are used to enhance the antioxidant properties of lubricating oils.

A disadvantage of the known additives is the inability to inhibit the oxidation process at high temperatures.

So an additive consisting of 0.5% phekaphaphamin and 0.5% diphenylamine at 25 ° C is only functional for

20 MHh.

An antioxidant lubricant additive is known, consisting of 75-9% of a mixture of K-phenyl-oC-naphthylamide and diphenylamine and 10-25% of the complex compound of the transition metal I or USh groups of the Periodic System. However, this additive has insufficient efficacy.

The aim of the invention is to increase

antioxidant stability additive. For this additive, in addition to the complex compound of the transition metal I or VIU of the Periodic System, it additionally contains 5–95% by weight organic base selected from the group consisting of pyridine, quinoline, hydroquinone, or H

derivatives.

Very often, complexes and organic bases have practically no antioxidant properties. An antioxidant additive consisting of an organic base and a chelate complex of transition metals of 1 or VU1 groups, for example, copper, cobalt, nickel, is introduced into lubricating oils in an amount of 0.01-10 wt.%.

Example 1. An antioxidant additive is obtained by adding to the solution 0.02 g of bis-3-tert-butylsalicylaldoxymate) oxygenyl cobalt (P) in 4.53 g of pentaerythritol ester (synthetic oil), 0.45 g of quinoline and stirring the mixture at 60% g70 C for 10 min.

Example 2. Antioxidant additive is obtained by adding to plant liupy 0, OO25 g of bis- (sarnyaldoximate) oxyginyl cobalt (I) in 4.9 g of pentaern TrHiOboro ester (synthetic oil) 0.09 I ° C -nifnlamin and stirring the mixture at GO-70 C for 10 min. Example 3. Antioxidant L (ис) is prepared by adding O, приб 125 g of bis- (salicylaldoximat) oxygeiyl cobalt (P) to a solution of 4.94 g of pentaery tritic ester of a synthetic oil), 0, 55 g of hydride № quinone, and mixing the mixture at 60 -70 C for 10 min. Example 4. Antioxidant additive is obtained by adding to the solution 0.02 g of bis- (3-tertbutylsalidylaldoxime oxygenyl cobalt (P) in 4.88 g of pentaerythritol ester (synthetic oil) 0.1 g of benzylgaridine and stirring the mixture for 10 micron at 6O -70 C. Example 5. An antioxidant additive is obtained by adding bis- (H-tertbutylsalicylaldoxime nickel (P) to a solution of OOL OL) in 4.83 g of pentaerythritol ester 0.05 g-hydroquinone and stirring the mixture for 1 O min at 60 -7O C. Example 6. Antioxidant additive is obtained by adding to races 0.02 g of bis (3-trvbutylsalicylaldoximate) copper (II) solution in 4.88 g of pentaerythritol ester (synthetic oil) 0.1 g of benzyl / brosidine and stirring the mixture for 10 min at GO-70 C. Antioxidant properties of oils The additives are evaluated according to the ampoule technique.The results of the research are presented in Table 1. The efficacy ({) efficiency of the antioxidant effect of the additives is determined by the time (1), during which the total absorption of oxygen (3.9 ml) in the ampoule occurs (the more t, the more effective additive), in table. Figure 2 shows the results of the study of the antioxidant efficacy of an oil with known and proposed additives. Compared to the known, the proposed reduction of the acid number of the Oil after oxidation by 13% i and a decrease in viscosity at -4 ° C by 17%. Table 1

Pentaerythritol ester

Pentaerythrin ester with an additive (VI-phenyl-ot-naphthylamine-0.5%; diphenyl-0.5%)

Pentaerythritol ester with 0.4% bis- (3-tr-butylsalshlaldoxymate) oxygenyl cobalt (PU

Pentaerythritol 0-4% bis

(S-tert-butylsalicylaldoximag) - nickel (P)

Pentaerythritol ester with 0.4% bis (-3-tert-butylsalicylaldoxime) copper (GT)

Pentaerythritol ester with 9% henoli

Pentaerythritol ester with 1.75% tJt-naphthylamine

Pentaerythritol ester with 2% benzylpyridine

Pentaerythritol ester with 1% hydroquinone

Pentaerythritol ether with 9.4% of the additive in example 1

ten

o-.20 20

10 10

40 20

80

SO

Obras pepper oil

Peitaerythritol ether from charge in Example 2

Giteit | Erit)) ntovy ether with kk in example 3

Pentaerythritol ether from charge in example 4

Pentaerythritol ether from charge in example 5

Pentaerythritol ether from charge in example 6

Note. Test temperature 250 С

Oil sample

G

Continuation of table 1

Oxygen absorption time (), min

60

140

420

42О

300

Table 2

Viscosity, eats Acid Corrosion