SU730797A1 - Method of spent oil regeneration - Google Patents

Description

The invention relates to refining and can be applied to restore the properties of used motor, industrial and other types of oils. During operation, the conversion of hydrocarbon components of mineral oils occurs with the formation of resinous substances, asphaltenes, carbenes and carboids, acidic products such as carboxylic acids, oxyketoxides, estolides. Salts of fatty and naphthenic acids, ash and mechanical impurities, metals gradually accumulate in the oil. To remove undesirable components and impurities, methods are used to treat waste oils with sulfuric acid, bleaching with earth, vacuum distillation, alkalization, and filtration 1. A known method of oil regeneration is where waste oil is sent to a mixer, where it is mixed with soda diluent and then settled. After descent of the alkaline selection, the oil at 70-80 ° C is washed with hot water, then treated with bleaching earth 2. The disadvantages of the known methods are that when regenerating waste mineral oils, the properties of the oil are not fully restored. As a result of regeneration, asphaltites, carbenes and carboids, acidic compounds, ash inclusions are removed from the oil; gums, salts of acids, polycyclic aromatics, sulfur is almost not removed from the purified oil. The resulting oil has a dark color and does not respond in all major indicators to GOST standards. The purpose of the invention is to improve the quality of the regenerated oils. The goal is indicated by the fact that in the method of regeneration of laboratories-oils by treating them with bleaching earth, the oil is additionally treated with a complex of aa hamine-gasoline chloride at 70-80 ° C. The treatment is carried out with a complex of the following composition, wt.%; Aluminum chloride O-bb Gasoline 34-40 Gasoline is a carrier of chloride a.puminium in the liquid phase and does not take an active part in complexing with undesirable components of the oil. Aluminum chloride forms coordination compounds with resinous substances, polycyclic aromatic hydrocarbons, with sulfur-containing compounds due to the donor-acceptor interaction.

After the second stage of purification, the resulting oil has a slightly yellowish tint. The oils are almost completely removed from the resin, the main part of polycylic aromatic hydrocarbons and organosulfur. The viscosity index of the oil rises to 110-120.

For the regeneration of the complex, it is treated with one and a half volumes of the solvent (the treatment is carried out twice at). At the same time, undesirable components are extracted from the complex and the complex re-acquires the previous activity. In laboratory conditions, the complex works for 4 months and does not lose its activity,

The recovery of waste oils by the complex can be carried out in a continuous pattern using a rotary disc contactor.

Example 1. Used autol after bleaching with ground cleaning has the following quality characteristics:

Density at, 8998

Refractive index -Ni, 4972

Kinematic viscosity at 50 ° С, cSt39.58 Kinematic viscosity at cSt8,03 Conradson coking ability, wt.% 2.89 Sulfur content, wt.% 0.71

In countercurrent, with the use of a rotary disc contactor, the oil is purified by an aluminum chloride / galosh complex. The concentration of aluminum chloride in the complex is 60 wt.% Purification temperature. The ratio of complex to raw materials is 2: 1 by volume. Oil yield 75%.

The following oil quality is obtained:

Density at 20 ° С0.8587

Refractive index at 20 ° С1.4770 kinematic viscosity at 50 ° С, cSt26,6 kinematic viscosity at cSt 6,69 viscosity index 114,9 Conradson coking ability,. weight. % 0.0 Sulfur content, wt.% 0.0 Pour point, C.-13 The group hydrocarbon composition is determined for the obtained purified oil. The quality of the adsorbent used silica gel brand ASC. Methano-naphthenic

, 2.0

hydrocarbons up to 1.4900,%

88.1

20 Lightly aromatic p up to 1.3300,% 19.15

20 Average aroma p

up to 1.5900%

T zhe aromatika G (°

T)

above . 1.5900,%

Missing

Resins,% 0.75

The resulting purified oil was added with MACK - 3.8%, PMS 2, 0%, DM - 2.5%, PMCd - 1.0%, DF-11 2, 2%, PMS-200A - 0.003%.

Product characteristics of the oil are shown in Table 1.

Table 1

Ash content is sulfonate, not more,%

Alkalinity, not less, mg KOH / H

Water content

Flash point in an open crucible,

Pour point, not higher

Corrosion on plastic

lead C tincture no higher g / m

1.27

8.98 Footprints

217 -36

There is no

Thermo-oxidative stability by Folders at, not lower than, min

-. As can be seen from the above data, the regenerated oil is superior in its high-quality characteristic of factory high-index oils.

Especially in terms of viscosity index, pour point, and by sample formation,

PRI me R 2, The qualitative characteristic of an oil after cleaning with clay has the same quality indicators as in the previous example.

Level of quality

Viscosity at 100 s, cSt

Viscosity index, not lower

Ash content is sulphate, not higher,%

Alkalinity, not less than, mg KOH / g

Water content

Flash point, not lower, С

Pour point, not higher

Corrosion on the plates

from lead. C and C2, not higher, g / m

Thermo-oxidative stability by Folders at, not lower than, min

Stability against oxidation in the instrument

a) sediment, not more,%

b) viscosity at, not higher than / cSt

Content of mechanical impurities

not higher, %

Sulfur content,% High index masps, obtained by the proposed method even with dark additives, are amenable to analysis. As can be seen from the above data, regenerated high index oil has better quality indicators than factory high index oil. The viscosity is regenerated by Data m with a lEM eGs -bgs a and weak,

continuation of the table. one

69

50

The purification is carried out with a complex in which the concentration of aluminum chloride is increased to 66%. The ratio of complex to raw materials, the temperature in the rotary-disk contactor according to example 1.

The same additives are added to the resulting regenerated oil base.

Commercial characteristics of the oil are presented in table 2,

table 2

Per en erirov anise oil

8.78

116

1.19

8.73

Sledgl

 210

-36

69.0 is missing

0.002 9.11

Claims (2)

0.006 0.09 acid number after an intensive increase remains at the same level, and the alkalinity of the operating oil remains high. Claims 1. Method for regeneration of waste oils using bleach treatment pug. 730 tons of earth, characterized in that, in order to improve the quality of oils, they are additionally processed using aluminum chloride complex gasoline at a temperature of 70-80 ° C. 2. The method according to the pl, -o and tly, and the fact that the treatment is carried out with a complex of the following composition, H6C f 978 Aluminum chloride 60-66. Gasoline 34-40 Sources of information taken into account during the examination 1. I. I. Zv, Transformer Oil Regeneration, Chem., 1972, p.47-48. 2. Ibid, pp. 99-100 (prototype).