RU2238301C1 - Preservative grease - Google Patents

Abstract

FIELD: lubricants.

SUBSTANCE: grease for protection of metallic structure against corrosion contains, as base oil, asphalt-tar-paraffin deposits formed during oil production and is composed of 10-20% petrolatum, 80-90% mentioned asphalt-tar-paraffin deposits, and 0.9-1.1% (above 100%) anticorrosion additive.

EFFECT: simplified grease composition, reduced consumption of petrolatum, extended resource of raw materials, and reduced cost.

2 tbl

Description

The invention relates to preservation hydrocarbon greases for general purposes, in particular to gun greases, and can be used to protect metal structures from corrosion.

A known lubricant composition, representing an alloy of the following components, wt.%:

Petrolatum 60-70

Base oil 25-35

Ceresin 3-5

Corrosion Prevention Agent

MNI-7 0.9-1.1

(see VV Sinitsyn. Greases in the USSR. - M.: Chemistry, 1984, p.144-147). This lubricant composition is selected as a prototype.

The signs of the prototype, which coincides with the features of the claimed invention, are petrolatum, base oil, anti-corrosion additive MNI-7.

The disadvantages of this composition are: multicomponent and the use of expensive and scarce materials - petrolatum, oil, ceresin. These are oil refining products, which are specially obtained at the refinery, which complicates and increases the cost of the lubricant production process.

The task of the invention is to simplify the composition, reduce the consumption of petrolatum, expand raw materials and reduce the cost of lubrication.

The problem is solved due to the fact that the known lubricant, including petrolatum, base oil, anti-corrosion additive MNI-7, contains base oil as a base oil - asphalt-resin-paraffin deposits (ASPO) in the following ratio of components, wt.%:

Petrolatum 10-20

ASPO 80-90

and in excess of 100% - anti-corrosion additive MNI-7 0.9-1.1

Signs that distinguish the claimed composition of the lubricant from the composition of the prototype - the use of oil as the base waste of oil production - paraffin, as well as the quantitative content of the ingredients used, wt.%: Petrolatum 10-20; ASPO 80-90 and over 100% - anti-corrosion additive MNI-7 0.9-1.1.

For the preparation of grease, petrolatum according to TU 38-401166-90, ASPO and anti-corrosion additive MNI-7 are used.

ASPO - oil waste of oil-producing complex enterprises, which is formed during the cleaning of technological equipment - oil storage tanks, bullets, sewers, steaming tubing using special installations for dewaxing. Unlike other solid wastes of oil production, paraffin deposits are a pure organic product, not mixed with the ground and containing wt.%:

Hydrocarbons 85-95

Mechanical impurities 1-5

Water 1-5

Sulfur 1-3

In chemical terms, paraffin deposits are hetero-organic high-molecular compounds. They have a complex composition and structure formed from hydrocarbons. The group chemical composition of paraffin deposits is determined by hydrocarbon complexes - oils, resins, asphaltenes, the content of which is, wt.%: 3-8 asphaltenes; 11-16 pitches; 71-81 oils.

The method of obtaining preservation grease is carried out in the following sequence. First, the paraffin is loaded into an environmentally sound solid waste treatment plant, where the separation of solids, heating of oil waste to 50-80 ° C, and water separation takes place. Next, the prepared paraffin and petrolatum are poured into a cooker equipped with heating, using electric energy or steam through a jacket and a mechanical mixing device. Then the temperature is raised to 90 ° C and the dissolution process is carried out for 30 minutes until the product is completely homogeneous. Next, the anti-corrosion additive MNI-7 is loaded into the solution and at the same temperature the contents of the apparatus are mixed for 10 minutes until completely uniform. Lubricants are produced at atmospheric pressure. The finished grease is cooled, analyzed and drained.

As raw materials were used:

- petrolatum according to TU 38-401166-90

- anti-corrosion additive MNI-7

- paraffin composition, wt.%:

Paraffins 42.3

Oils 40.9

Asphaltenes 3.0

Resins 11.1

Sulfur 1.8

Water 1.3

Mechanical impurities 1.4

According to the described method, lubricant samples were made, the composition of which is given in table 1.

The prepared lubricant formulations passed laboratory tests. For experimental verification of the claimed lubricant composition were made five mixtures, three of which showed optimal results in comparison with the known lubricant (table 2).

The study of the basic physicochemical properties of the samples of the proposed lubricant was carried out in accordance with the requirements of GOST 19537-83, namely, the dropping point was determined according to GOST 6793-74, the creep temperature was determined according to GOST 6037-75, and the corrosion effect on metals was determined according to GOST 9.080-77, acid number - according to GOST 5985-79, mass fraction of mechanical impurities - according to GOST 2477-65, water-soluble acids - according to GOST 6307-75, test of protective properties at 50 ° C for 30 hours on plates of steel grade 50 - according to GOST 9.054-75.

As can be seen from the data table. 2, the main characteristics of the proposed grease satisfy the requirements of GOST 19537-83, presented to gun grease. The dropping point of the proposed lubricant is not lower than 63-66 ° C; in all samples there are no mechanical impurities allowed by GOST; all samples pass the corrosion test and do not contain water; the content of water-soluble acids and alkalis, as well as the acid number of the lubricant within normal limits; creep temperature not lower than 50 ° С.

A prohibitive excess of the content in the composition of the ARPD lubricant, possible with a prohibitive decrease in the amount of petrolatum, does not provide the normative quality of the grease in terms of a creep temperature of 48 ° C at a rate of 50 ° C and a dropping point of 58.2 ° C at a rate of 60 ° C (Table 2, sample 1).

A decrease in the amount of paraffin in the lubricant composition below the proposed range with a corresponding increase in the amount of petrolatum above the optimum does not lead to a significant increase in the dropping point and creep of the lubricant (Table 2, sample 5), which shows the inappropriateness of such a change in the ratio of the components of the composition.

The invention will allow:

- to simplify the composition of the lubricant by eliminating scarce straight-run fractions of oil refining, in particular oil ceresin, base oil;

- reduce the consumption of petrolatum for the preparation of lubricant from 60-70% to 10-20%;

- expand raw materials and reduce the cost of lubrication through the use of oil recovery paraffin.

Claims (1)

Conservation grease containing petrolatum, base oil and anti-corrosion additive MNI-7, characterized in that it contains waste oil as base oil - asphalt-resin-paraffin deposits of paraffin deposits in the following ratio of components, wt.%: Petrolatum 10-20 ASPO 80-90 and over 100% - anti-corrosion additive MNI-7 0.9-1.1.