HU180272B - Process for preparing ep-lubricants - Google Patents

Abstract

The invention relates to a process for the production of; T lubricants which have a pronounced wear protection. They are used in particular.in KraftUbortragungs- and storage technology and metalworking. The object of the invention is to produce the base of suitable mineral oil derivatives EP-scraper material o from readily available raw materials which impart both good SP-behavior and good corrosion-inhibiting and oxidative-inhibiting properties to your oil. It has been found that EPs are obtained with good oxidative and corrosion-inhibiting properties, and that suitable mineral oil fractions are obtained from a crude product of unsaturated alcohols, elemental sulfur. Phosphorus pentasulfide md alkylamines mixed. The EP lubricants according to the invention are preferably used in highly loaded hypoid gears, in gear oils for all-season use in outer plants, in mining and in oil-pressure driven mining and dismantling oils.

Description

Knobel Erlisrd, Kolberg Hsni. Röllig Manfied, okay. chemists, Merseburg, German Democratic Republic

VEB Petrolchemlsches Kombinát Schwedt, Schwedt, German Democratic Republic

Process for producing EP lubricants

The present invention relates to a process for preparing EP lubricants. The EP lubricants of the present invention have a high abrasion resistance, especially in the areas of power transmission and lubrication. bearing technology and metalworking.

For the purpose of producing EP lubricants, EP suitable lubricants are mixed with additives such as EP additives, corrosion and oxidation inhibitors, anti-freezing agents and the like. Dithiophosphates and phosphonates, sulfurylated, chlorosulfurylated and phosphorus sulfurylated fatty acid esters and alkyl polysulfides are generally used as EP additives. Sulphonates and organic nitrogen compounds are used as corrosion inhibitors. Alkylnaphthalenes and polymethacrylates are used to reduce the freezing point and alkylphenols and phenothiazines are used to inhibit oxidation.

The factory technology for producing EP lubricants based on these known solutions is quite costly. In addition, starting materials, especially EP additives, are not always available ............ ........ - ................ ...

It is an object of the present invention to provide a suitable mineral oil raffinate-based EP lubricant using readily available additives.

It is an object of the present invention to provide an additive which is a ke? feminine material provides good EP properties and makes it possible to completely or partially omit corrosion and oxidation preservatives and additives to reduce freezing point ^

According to the invention, EP lubricants are prepared by:

180.272 to 1 to 12% by weight of an additive consisting of unsaturated aliphatic C 1 -C 4 alcohols, elemental sulfur, phosphorus pentasulphide and hydrolysed and / or solvent refined and paraffinic free fractions of suitable viscosity. They are derived from the reaction of primary and / or secondary alkylamines containing -18 carbon atoms in several steps.

The EP additive useful in the present invention is prepared by providing an unsaturated aliphatic at 140-220 ° C.

with vigorous stirring with 5 to 15% by weight, preferably 10% by weight, of elemental sulfur. The reaction was continued for 3-5 hours. The product obtained is diluted, if necessary, with mineral oil, then 8 to 18%, preferably 13% by weight of phosphorus pentasulfide is added in small portions at 100-150 ° C, preferably 120 ° C, with vigorous stirring, and The reaction is carried out at 180 ° C, preferably 160 ° C, for 3-5 hours. Subsequently, a solution of a mixture of primary and / or secondary alkylamines containing from 8 to 18 carbon atoms in the alkyl chain in mineral oil is added to the reaction mixture with stirring at 120 ° C. The reaction mixture was maintained at the specified temperature for about 2 hours. All percentages refer to the amount of alcohol, and a total of mineral oil is added to make up about 50% of the active ingredients.

Although EP lubricating oils added with the above product provide excellent anti-corrosion and anti-aging effects, in addition to known additives and pressurizers for specific applications.

Example 1

For a mixture of aliphatic unsaturated alcohols with an average of 18 carbon atoms / OH number 198 mg KOH / g; iodine 83/180 ° C is added continuously in 10 wt. and the mixture is stirred at the above temperature under nitrogen for 3.5 hours. Thereafter, 40 weight% mineral oil (12 cSt) at a viscosity of 50 ° C is added to the product, whereby the temperature is reduced to 120 ° C. Subsequently, 13.5% by weight of phosphorus pentasulfide was added and the mixture was heated to 150 ° C for 5 hours, with 5% by weight of primary alkylamines having an average of 8 carbon atoms in the alkyl group and 5% by weight of secondary alkylamines having 12 to 18 carbon atoms. 30 g of mineral oil in mineral oil are added to the reaction mixture, which is stirred at 120 [deg.] C. for a further two hours, flushed with nitrogen and filtered. Total weight refers to the initial amount of alcohols. 6.5 volumes of the EP additive thus obtained are added to the refined petroleum (viscosity 230 cSt at 50 ° C) to give gear oil, which is heavily loaded on large trucks; suitable for lubricating the rear axle drive of hlpoid gears.

Example 2 To a suitable mixture of paraffin-depleted petroleum refinates having a viscosity of 80 cSt at 2 ° C, 2% by weight of the EP additive prepared in Example 1, and 1% by weight of zinc dialkyldithiophosphate and 4% by weight of polymethacrylate type V1 enhancer. This results in excellent gear oil, which is particularly suitable for all-year machines in open-pit mining.

-2180 272

3 «example

An average of 18 aliphatic unsaturated alcohols to a mixture of / OH value 198 mg KOH / g, iodine value: below 83 / nitrogen atmosphere of 7% and 0.3% by mass ^{1-cinketilfenil} ditiokarbamátoü was 170 ° C while stirring. The mixture was stirred at 170 ° C for 5 hours, followed by addition of 35% by weight mineral oil (viscosity at 50 ° C 12 cSt) at 110 ° C; decrease. At this temperature, 10% by weight of phosphorus pentasulfide was added and the reaction mixture was heated to 160 ° C and stirred at this temperature for 5 hours. Subsequently, in the alkyl group

A solution of 5% by weight of an industrial grade secondary alkylamine having 12 to 18 carbon atoms in 35% by weight mineral oil is added to the reaction mixture, stirred for a further 2 hours at 120 ° C, then purged with nitrogen and filtered. The weight percent data refers to the amount of starting alcohol.

Suitable for paraffin-depleted mineral oil raffinate / viscosity at 50 ° C of 30 ° C / 8% by weight of the above EP additive and 0.01% by weight of polyisobutylene type adjuvant to give a spe- cial oil, which ensures safe operation of air-powered mining machines, and can be used as hydraulic oil.

Example 4

A machining oil suitable for machining high impact steel is obtained by adding 10% by weight of a 10% w / w EP additive of Example 3 and 5% by weight chlorparaffin to a paraffin-depleted petroleum raffinate / 50 ° C viscosity at 50 ° C.

Claims (3)

A process for the preparation of EP lubricants using hydro-refined and / or solvent-refined, paraffin-free petroleum components and from 1 to 12% by weight of EP additive, characterized in that an additive is added to the mineral oil component which is unsaturated aliphatic C-. It is derived from the reaction of multiple alcohols, elemental sulfur, phosphorus pentasulfide and primary and / or secondary alkylamines containing from 8 to 18 carbon atoms in the alkyl group. Process according to claim 1, characterized in that 5 to 15% by weight, preferably 10% by weight of elemental sulfur, 8 to 18% by weight, preferably 13 to 13% by weight of phosphorus pentasulfide and 3 to 8% by weight of alcohol are used for the reaction. %, preferably 5% by weight of alkylamine is used. The method of claim 1 or 2, wherein the reaction with sulfur is carried out at 180 ° C, the reaction with phosphorus pentasulfide at 160 ° C and the reaction with alkylamine at 120 ° C.