SU910614A1 - Sec-octylbutylxanthogenate as antiscorching additive to lubrication oils - Google Patents

Description

The invention relates to a new compound sec-octylbutylxanthogenate of the formula ^ -ocS-ch ^ ₍₁₎

S which has anti-seize and anti-wear action and can therefore find application as an additive to lubricating oils.

Compounds from the class of xanthates are described in the literature, for example, O-alkyl-B-chloroalkyl xanthates of the formula R-0-C (S) -SC _n H ^ _n -) (+ 4C1x, where R C ^ -Cde-alkyl; η = 5 “ 25 of them are 2-20, which have extreme pressure properties and can be used as additives to lubricating oils (13.

However, well-known additives contain a large percentage of chlorine (32%), which is known to increase surface wear. In addition, when using

FDI of such additives at elevated temperatures can easily split off hydrogen chloride, which increases the oxidation of oils and their corrosiveness to steel.

The aim of the invention is the expansion of the arsenal of extreme pressure and antiwear additives, which would have high extreme pressure and antiwear activity.

A new compound of formula I is proposed as an extreme pressure and antiwear additive to lubricating oils.

This compound is prepared by reacting an alkali metal butyl xanthogenate with sec-octyl chloride in an aqueous medium in the presence of an emulsifier (Lotus or Astra fatty acid powder) at 7080 ° C for 4-5 hours. 52% yield.

9106

Example 1. sec-Octylbu.tilksan.togenat (additive T-35)

376 g (2 mol) of potassium butyl xanthogenate, 250 ml of water and 6-8 g of emulsifier (Lotus or Astra powder) are placed in a reaction flask equipped with a stirrer. The contents of the flask are heated to 7 ° C ^{, g} C, and with vigorous stirring, 296 g (2 mol) of sec-octyl chloride are slowly added. The mixture was stirred for 4.5 hours and cooled to room temperature. The oil is separated, washed twice with water, dried with calcium chloride. Unreacted sec-octyl chloride is distilled off, the residue is distilled in vacuo. Obtain 270 g (52%) of T-35 additives in the form of a yellow oil, b.p. 118-130 ° C / 2 mm Hg, b.p. ЗУ-330 ° С / 720 mm Hg; n * ° 1.4e43.

Example 2. Anti-seize ν and anti-wear properties of Additives T-35.

The tests are carried out on the bench of the CWM at given axial loads and temperatures by a known method. For testing, T-35 additive compositions (3 wt.%) With hydrocarbon synthetic oil (USM) MAS-Z / ZO, with pentaerythritic ester of synthetic fatty acids of the Cj.-Cg fraction (PET) and with a mixture of alkylbenzene (AB) fraction 340 are prepared. -500 ° C with PET (1: 1 ratio). At the ChShM stand ”critical loads (₽k) are determined for pure dispersion media and for their compositions with T-35 additive at 20 ° C and a rotation speed of 1500 rpm. To study the anti-wear properties of this additive, the diameters of the wear spots (djg) at 120 ° C and a rotation speed of 1500 rpm are also determined for pure dispersion media and for their composition with the T-35 additive (3 wt.%). The test results are shown in the table.

4 4 The name of the media and compositions Critical The diameter of the wear spot, d hs, mm kaya cha load PK, kg USM MAS-Z / ZO 56 0.55 AB + PET (1; 1) 47 0.89 PAT 67 0.95 USM + 3 wt.% T-35. 106 0.44 AL + PET + 3 weightD T-35 71 0.72 PET + 3 wt.% T-35 100 0.71

Tests have shown that the additive T ~ 35 ~ sec-octylbutylxanthogenate significantly improves the extreme pressure properties (P ^) of hydrocarbon oils (1.89 times), alkylbenzenes (1.51 times) and essential liquids (1.49 times). This additive reduces wear in the composition with hydrocarbon oil by 20.0% in the composition with alkylbenzenes by 19.1%, in the composition with pentaerythritol ether by 25.3%. Thus, the T-35 additive has good anti-wear properties and does not cause corrosion of plates made of copper-containing alloys and steel at 150 “1 ° C.

Claims (1)

CLAIMS sec-0ktipbutilksantogenat formula ₄ e _e n -O-C - ^ - CH ^ $ ¹³ as an extreme pressure and antiwear additive to lubricating oils.