Method for waste mineral motor oils purification

FIELD: chemistry.

SUBSTANCE: purification of waste mineral motor oil using monoethanolamine, orthophosphoric acid as coagulants and isopropyl alcohol, methyl ethyl ketone as solvents, purification is carried out in two stages, the first stage includes introduction of 1 vol. % of monoethanolamine and 1 vol. % of isopropyl alcohol into the waste oil, followed by heating to 110°C and centrifugation, and the second stage includes introduction of 1 vol. % of monoethanolamine and 1 vol. % of a reagent, consisting of 94% isopropyl alcohol, 3% phosphoric acid and 3% methyl ethyl ketone, into the purified oil, and the mixture is heated to 120°C and centrifuged.

EFFECT: application of the proposed method for waste mineral motor oil purification allows to completely remove insoluble impurities, oxidation products, resins due to two-stage purification, the refined oil has a high degree of clarification.

1 tbl



Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a method of waste oil purification by the preliminary heating of oil and following separation of pollutants, with the addition into the oil of a mixture of isopropyl alcohol and carbamide in a ratio of 1:1, taken in a quantity of 1.0%, counted per dry carbamide from the weight of the oil to be purified.

EFFECT: increased quality of waste oil purification with the simultaneous simplification of the technological process.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to method of waste synthetic motor oil purification by addition of carbamide water solution, taken in quantity 0.5-1% calculated per dry substance from weight of purified oil with introduction of 2.5-3.0% (wt) 0.1 N solution of potassium hydroxide in ethylene alcohol, then mixture is heated to 110-115°C with the following separation of pollutants.

EFFECT: invention ensures removal of large quality of mechanic pollutants from waste synthetic motor oil.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of cleaning engine oil from ageing products and impurities by mixing preheated engine oil with a resolving agent, followed by separation of the cleaned engine oil by centrifuging, wherein the resolving agent used is 0.05-0.1% of 40% ammonia solution of carbamide per volume of the cleaned oil, separation of the cleaned engine oil is carried out is carried out directly in the centrifuge of an internal combustion engine.

EFFECT: simple cleaning method and high quality of cleaning engine oil in use.

1 tbl

FIELD: machine building.

SUBSTANCE: invention relates to thermal-gravity cleaning of turbine and transformer oils of impurities and water. It comprises first vessel, system for oil discharge from first vessel and system to feed oil to first vessel. It comprises oil flow laminator arranged at first vessel, above its bottom. Device differs from know designs in that it comprises extra second vessel, system to discharge oil from second vessel, system to feed oil to second vessel including oil flow laminator arranged above vessel bottom. Note here that system to discharge oil from first vessel is connected with system to feed oil to second vessel. System to feed oil to first vessel is equipped with heater. Said system to discharge oil from second vessel incorporates the extra filter while first vessel is equipped with top wall. Top end wall of first vessel and bottom end wall of second vessel are integrated while second vessel is arranged directly above first vessel.

EFFECT: higher quality cleaning of impurities, water and waxes.

2 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: apparatus for regenerating spent transformer oil includes a waveguide at the ends of which there are stop rings and a hollow cone with a hole at the vertex, capable of moving between the stop rings through a rod which is connected to the base of the hollow cone through a sliding ring.

EFFECT: effective regeneration of transformer oil through coagulation of molecules of water and ageing products with a rotating electromagnetic field.

1 tbl, 7 dwg

FIELD: process engineering.

SUBSTANCE: proposed method comprises placing hollow truncated cone with hole at waveguide end top to place waveguide with hollow truncated cone in electric unit filled with transformer oil. Note here that ions flow down from surfaces of waveguide and hollow truncated cone to induce rotary magnetic field in ambient space. Free radicals in chaotic state come to rotary magnetic lines of force. Distance between free radicals decreases to make free radicals integrate into clusters for recombination of free radicals into neutral molecules. This results in decrease in concentration of free radicals in transformer oil. It brings about transformer oil oxidation retardation.

EFFECT: retardation of transformer oil oxidation by recombination of free radicals.

1 cl, 3 dwg

FIELD: chemistry.

SUBSTANCE: 50% aqueous solution of carbamide in amount of 0.1-0.3% with respect to volume of the oil to be cleaned is mixed with 1-2% of the oil to be cleaned. The obtained mixture is added to the operating engine oil which is preheated to 80-90°C and then stirred for 5-10 minutes, followed by separation of the oil by centrifuging.

EFFECT: high quality of cleaning, longer service life of the oil.

1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention refers to method for recovery of waste transformer oil which is contained in reservoir and its purification from ageing products, and the above method involves the following operations: installation of waveguide in which a flattened hollow cone is located above transformer oil reservoir. At that, top of flattened hollow cone is directed to transformer oil coaxially to the reservoir. Oil recovery is performed due to action of water ions and molecules dropping off the surface of waveguide and hollow flattened cone and enveloping the above surfaces, due to which interaction of water ions and molecules with radicals of transformer oil, coagulation of ageing products and their settlement at the reservoir bottom occurs; as a result, recovery of waste transformer oil and its purification from ageing products is performed.

EFFECT: method allows improving electrical strength of waste transformer oil, decreasing moisture content and increasing product purity class by means of coagulation of ageing products in rotating ionic field.

1 cl, 2 ex, 2 tbl, 4 dwg

FIELD: machine building.

SUBSTANCE: used oil is heated to 90°C and processed, in mixing, by water solution of electrolyte (silicate and sodium, potassium and lithium carbonate) in amount of 0.4-0.6 wt % of oil weight. Then, water solution of lithium, sodium or potassium salt of perfluoroether-perfluorocarboxylic acid and organic cation-active coagulant in amount of 0.3-0.4 wt % of oil weight are added to said mix. Thereafter, slime and extracted oil are separated.

EFFECT: pollution-free method, higher degree of cleaning.

2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: spent oil is successively passed through three layers, wherein the first layer employs KM or 2/25 calcium carbide or calcium carbide screenings, where acidic impurities are dried and neutralised. The second layer employs a mixture of small-fraction quartz sand with particle size of 0.1-0.63 mm with alumina or fine-grained MSKG or ASKG silica gel in weight ratio (1-10):1, in which adsorption and filtration take place. The third layer employs coarse-grained KSKG silica gel or mixture thereof with coarse sand with particle size 1.6-7 mm, in which, simultaneously with percolation, degassing is carried out using a vacuum and continues in the thin oil layer until collection of the purified oil.

EFFECT: simple and cheap technology owing to realising the method in one apparatus and high quality of purification.

1 tbl, 1 dwg

FIELD: lubricants.

SUBSTANCE: invention relates to purification of light- and middle-group mineral oils exhausted during operation of vehicles. After preliminary magnetic separation-mediated removal of suspended solids, centrifugation, and filtration, oil is additionally stirred at 15 to 80оС with aqueous solution of reagent at reagent-to-water ratio 1:1 and then settled until full clarification. Reagent contains 60-95% orthophosphoric acid, 4.7-39.7% isopropyl alcohol, and 0.3-10% methyl ethyl ketone.

EFFECT: increased degree of purification.

4 ex

FIELD: lubricants.

SUBSTANCE: invention relates to methods for purifying petroleum-derived oils and can be used for removing suspended impurities from waste motor oils at railway enterprises, engineering plants, big fleets, and the like. Waste water is purified by preliminarily heating oil to 70-75оС, adding urea in the form of 30-50% aqueous solution in amount 0.5-1% on the weight of oil, and separating impurities. According to invention, after addition of urea, 2-2.5% of ethyl alcohol is added.

EFFECT: improved refining quality.

1 tbl

FIELD: lubricants.

SUBSTANCE: spent lubricating oil from feed reception stock is settled to remove water and suspended particles and then passed to chemical treatment and coagulation block, to which calculated amounts of coagulant aqueous solution and reagents are added. Mixture is agitated with air and settled to separate waste water, which is sent to oil trap. Thus treated oil is directed to intermediate stock and then to vacuum drying block or to feed preparation stock wherein feed is prepared for vacuum distillation. Dried oil is passed through contact purification and filtration block and then stored in product stock. Oil freed of water and suspended particles may be, after optional vacuum drying, directed to feed preparation stock and then subjected to vacuum distillation. Fuel gases released during vacuum distillation are used to concentrate alkali effluents, light fractions are used as furnace fuel, bottom residue is recovered, and desired lubricating oil fractions are subjected to contact purification and filtration followed by collection of lubricating oil in purified oil stock and mixing them with special additives. Possibility of separately receiving different-quality feed material is also envisaged.

EFFECT: enabled reusing environmental dangerous waste, improved quality of regenerated oils, and simplified technology.

2 cl, 1 dwg

FIELD: petrochemistry.

SUBSTANCE: industrial oil is treated with purifying reagent. As purifying reagent 25-40 % fresh aqueous solution of chloramine, benzene sulfonic acid and calcium chloride mixture in mass ratio of 3-7:1-2:5, respectively, is used. Said reagent is charged into exhaust industrial oil heated to 15-60°C in amount of 5-60 kg per 1 m3 of oil (calculated as dry matter). Process includes 60 cycles comprising sequential steps of mixture agitation for 0.5-3 h and conditioning for 1-12 h. Then obtained product is conditioned for 24-48 h, upper oil layer is drawn off and product is conditioned again at 15-55°C for 7-14 days followed by drawing off of target product-containing upper layer.

EFFECT: decreased energy consumption; increased purifying ratio.

1 ex

FIELD: petrochemical industry; methods of purification of the waste hydrocarbon oils with the purpose of their reuse as the base oil.

SUBSTANCE: the invention is pertaining to the method of purification of the waste hydrocarbon oils for their reuse as base lubricants The method provides, that after extraction and removal of the aliphatic solvent conduct the following phases: a) continuous flash vaporization at atmospheric or close to it atmospheric pressure for the purpose of separation of the light fractions at presence of the small amounts of the main compound or the reducing agent, or the mixture of that and other; b), continuous distillation in the fractionating column of the ground fluid received at the stage (a) at the moderate vacuum and temperatures at presence of the main compound or the reducing agent or the mixture of that and other with application of recycling of the ground product of the column into the raw, separation in the form of side extract torrents of the vacuum gas oil or the spindle oil and the base oils, and also the boiler fuel or then asphalt component from the bottom of the column. The technical result of the invention is improvement of the color and reduction of acidity without additional phases of purification of the waste oil products.

EFFECT: the invention ensures improvement of the color and reduction of acidity of the lubricants without additional phases of purification.

11 cl, 4 ex, 2 dwg

FIELD: chemical technology.

SUBSTANCE: method involves filtration of depleted mineral oils through a mixture of Fe3+ oxide and sand taken in the weight ratio sand : Fe3+ oxide = 1:(0.5-1.0). Method provides enhancing degree of purification of depleted mineral oils.

EFFECT: improved method of treatment.

1 tbl, 8 ex

FIELD: physics.

SUBSTANCE: method is used for cleaning oil contaminated with weighed particles using a centrifugal separator. The liquid separation medium, which is denser than the cleaned oil and insoluble in it, is put into a separation chamber in such a quantity that the layer of this medium forms a liquid valve in the rotating centrifugal rotor, covering the output opening for the heavy phase. After this, the oil and the liquid separation medium are put into the separation chamber of the rotating centrifugal rotor. The cleaned oil is output through a central output opening for the light phase of the separation chamber, and the liquid separation medium and the separated particles are output through the output opening for the heavy phase. Heavy polymer is the preferred separation medium.

EFFECT: increased degree of purity of the oil contaminated with hard-to-remove small dispersed particles.

7 cl, 1 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical technology of purification of disperse media and colloid solutions. The method of purification of solutions is claimed. It contains disperse and colloid particles, using superhighmolecular element-organic floculant or inter-polymer complexes based on it, general formula where m=1-9; Radicals: R1=(CH2)nPol, where n=2-4; R2 and R3 are selected from H; CH3; C2H5; C3H5; C3H7; C4H9; R4 and R5 are selected from CH3; C2H5; C3H5; C3H7; C4H9; C6H5; OH; OM; M=Na; K; Cs; R6=(CH2)k, O; where k=1-4; R7=R4; [NR1R2R3]O; Pol=Organic polymer, for instance, polyacrilate. Invention can be used for purification of liquid vegetable, mineral and synthetic oils, purification of sugar-containing solutions, preparation and purification of sewage waters, as well as in all industries, where it is necessary to purify solutions from disperse and colloid components.

EFFECT: simplification and increase of effectiveness of the process of purification of disperse media and colloid solutions with reduction of power expenditure.

3 cl, 3 ex

FIELD: technological processes.

SUBSTANCE: invention is related to method for regeneration of spent mineral oils. Substance: method includes the following stages: (a) demetallisation of spent mineral oil by means of its treatment with aqueous solution of ammonium salt containing anions of phosphate and sulfate groups, with further separation of demetallised oil, (b) distillation of demetallised oil produced at the stage (a), at atmospheric pressure and in presence of alkaline hydroxides and (c) distillation of liquid residue produced in process of atmospheric distillation at the stage (b), in vacuum and in presence of alkaline hydroxides with preparation of basic lubrication oils.

EFFECT: improved quality of oils, method simplification, reduction of hard wastes production and contamination of equipment.

13 cl, 1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in petrochemical industry, industrial power engineering and on facilities which use transformer oil. The oil to be purified in an adsorber successively passes through a layer consisting of a mixture of quartz sand with fine particles and alumina in mass ratio of (1-5):1, and then through a layer of a coarse-grained sorbent (or a mixture of coarse-grained sorbents). The oil flows from the adsorber in form of a thin film into a collector. Degassing is carried out at the collection line of the purified oil using a vacuum. The method is realised in a single apparatus.

EFFECT: simplification and reduction of the cost of the technology of purifying transformer oil which meets quality requirements for reclaimed oil.

1 tbl, 2 ex, 1 dwg