SU910613A1 - H-octylbutylxanthogenate as antiscorching additive to lubrication oils - Google Patents

Description

This invention relates to a novel compound, n-octylbutyl xanthate of formula

ti Hj-o-C-iS-daH,

(15

which has anti-seize action and therefore can be used as an additive to lubricating oils.

The literature describes compounds from the class of xanthates, for example, 0-alkyl-5-chloroalkylxanthates of the formula

K-0-C (5) 5-Cg, H (1 „.х4лС1х,

where R is C ((5-alkyl,

P ; 5-25,

X 2-20,

which have anti-seize properties and can be used as additives for lubricating oils 1.

However, the known additives contain a large percentage of chlorine (35), which, as is well known, increases surface wear. In addition, when using such additives at elevated temperatures, hydrogen chloride can be easily split off, which increases the oxidability of the oils and their corrosive aggressiveness over the steel ratio.

The aim of the invention is to expand the arsenal of extreme pressure additives that would have high anti-seize activity.

A novel compound of Formula I is proposed which has anti-seize activity.

This compound is obtained by reacting an alkali metal butyl xanthate with n-octyl chloride in an aqueous medium in the presence of an emulsifier (fatty acid based Lotus powder) at 40–80 ° C for 3–6 h. Yield + 2.8%. 3 Example 1. n-Octylbutylxan togeiat (T-28). In a reaction flask equipped with a stirrer, 376 g (2 mol) of potassium butyl xanthate, 250 ml of water and 6-8 g of emulsifier (Lotus powder or Astra powder) are placed. The contents were heated to and, with vigorous stirring, 296 g (2 mol) of n-chloride octyl were slowly added. The mixture is stirred for 5 hours, cooled to room temperature. The oil is separated, washed twice with water, and dried with calcium chloride. Unreacted n-chloride actil is distilled off, the residue is distilled in vacuum. Get 22k g (2.8%) of the additive T-28 in the form of a light yellow oil, so Kip, 138-1 5 ° C / 2 mm Hg. 335345 ° C / 760 mm Hg, Art ,, d 0.9% 3. Anti-backing properties of the additive T-28. Bench tests of T-28 additive in a composition with carbon-hydrogen oil (USM) (MAC-3/30 alkyl benzenes (AB) (fraction C 0300 C), pentaerythritol ether of synthetic fatty acids of the Cj-C-7 fraction a four-ball friction machine (ChSM stand) using the method of step loading of balls at a temperature of 20 s and a rotation speed of 1500 rpm. A critical load (P) was determined for the initial dispersion media and for their compositions with 3 weight, T-28 additives. , 1. Tests have shown that the additive is n-octyl butyls ntogenat (T-28) significantly improves the anti-seize

Table 2 3. -4 properties (Pyt) of hydrocarbon oils (1.3 times), alkyl benzenes (1, 58 times) and essential liquids (1.88 times). The performance of the T-28 additive in a composition with hydrocarbon oil (MAS-Z / ZO) was investigated on a five-ball machine. Trayi (PMT). This was taken as 3 pts of this additive. On the PIM-2 instrument, the evaporation of the additive in a thin layer at 120 ° С was determined. . The results are shown in Table. 2. Additive T-28 increases the operating time of the oil MAS-Z / ZO at high temperatures (at 250 ° C 1.5 times). The evaporability of the oil compositions with an additive T-28 at 120 s for 2 h did not exceed 2, wt., Which is a completely acceptable value. Table 1 Critical Name of the environment load, kg and compositions of CM (MAS-Z / ZO) B (fractions Z + O50 ° C) CM + 3 weight L T-28 B + 3 weight.% T-28 EE + 3 weight. T-28

90 -10

USM (MAS-Z / ZO)

100 3715 USM + 3 weight T-28

0.0

0.01 0.0

Claims (1)

2. 1.8 2.0 5 Formula of the invention n-Octyl butyl xanthate of formula. s in S 910613 4 as an anti-seize lubricant additive. Sources of information 5 taken into account in the examination 1. Review Journal of Chem (1975), 5П 253П.