SU1298244A1 - Method for removing fouling from used lubricating oils - Google Patents

Abstract

The invention relates to the regeneration of used lubricating oils, in particular, to the stage of preliminary purification of oils from contaminants, and can be used in the oil refining industry and in oil refining and regeneration plants in other branches of the national economy. The purpose of the invention is to improve the quality of the oils and reduce the duration of the process. The method of purification of used lubricating oils from contamination is that the oils are mixed with a 5-10% gasoline solution of a block copolymer of ethylene oxide and propylene based on ethylenediamine, the mixture is heated to a temperature of 100-150 ° C at a pressure of 0.3-1.0 MPa, after which the resulting sludge is separated. The method allows to purify waste oils at 100% of water and at 85-87% of mechanical impurities while reducing the time by more than 10 times. 1 tab. sl y eo y 4

Description

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The invention relates to the regeneration of used lubricating oils, in particular, to the stage of preliminary purification of oils from contamination, and can be used in the oil refining industry and on the oil of purifying and regeneration plants in other national economy.

The purpose of the invention is to improve the quality of the oils produced and to reduce the duration of the process,

The most polluted oil is used as the initial waste oil, the quality of which is given in the table.

Example 1 (known method). 1000 kg of waste oil is heated to BOC, 2 kg of a 5% aqueous solution of ethylene diamine-based propylene block copolymer based on ethylenediamine (diproxamin) is added, the mixture is stirred for 20 minutes, after which stirring and heating are stopped and settled for 14 hours, then the resulting sludge is drained. 820 kg of purified oil and 182 kg of psham are obtained.

Example 2, 1000 kg of waste oil, preheated to 80 ° C, is mixed with 5 kg of 10% gasoline solution of diproxamine, the mixture is stirred for 20 minutes and heated to 140 ° C at a pressure of 0.6 MPa for 1 h, after which stirring and heating is stopped, and the oil is centrifuged. 935 kg of purified oil and 70 kg of sludge are obtained.

Prize, 1000 kg of waste oil is treated with 2 kg of 10% gasoline solution of diproxamin, the mixture is stirred and heated to a pressure of 0.3 MPa for 0.2 h, after which the oil is centrifuged. Get 900 kg of purified oil and 102 kg of sludge,

PRI me R 4, Used oil in an amount of 500 kg, heated to 70 ° C, is mixed with 1 kg of gasoline with 0.05 kg of diproxamine dissolved in it, the mixture is stirred for 0.2 h and heated to 150 ° C at a pressure of 1, 0 MPa for 0.8 h, after which the oil is centrifuged. Get 470 kg of purified oil and 31 kg of sludge.

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25

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35

50 PRI me R 5, 500 kg of waste oil heated to 80 ° C are pre-cleaned, 1 kg of gasoline is added with 0.05 kg of diproxamin dissolved in it, the mixture is stirred for 0.2 h and / is heated for 1 h to 165 ° C at a pressure of 1.05 MPa, after which the oil is centrifuged # coziness. Get 470 kg of purified oil and 25 kg of sludge,

For example, in a preheated oil up to 85 ° C in an amount of 50 kg, 0.5 kg of 10% gasoline solution of diproxamine is added, stirred for 0.2 hours, held at 85 ° C for 0.5 hours, after what is centrifuged. Get 30 kg of purified oil and 20.5 kg of sludge.

Physical and chemical indicators of waste and cleaned engine oil are given in the table.

As can be seen from the above examples, heating the mixture at 150 ° C at a pressure of 1.10 MPa (Example 5) practically does not improve the degree of purification, and energy costs increase, as the heating temperature drops below 100 ° C (Example 6), the cleaning efficiency is unsatisfactory.

Verification of the proposed method of purification of used lubricating oils in the laboratory and on the pilot unit shows that it allows the purification of used oils to 100% of water and 85-87% of mechanical impurities while reducing the time by more than 10 times.

Claims (1)

Invention Formula The method of purification of used lubricating oils from contamination by treating them with a 5-10% solution of block copolymer of ethylene and propylene oxides based on ethylene diamine when heated, followed by separation of the sludge, in order to improve the quality of oils and shorten the duration process, use a gasoline solution of the specified blockcopolymer and the treatment is carried out at a temperature of 100-150 C and a pressure of 0.3-1.0 MPa, Mass fraction of water,% Mass fraction of mechanical impurities,% Coking ability,% Ash content,% The degree of purification of oil,%: from water from mechanical impurities Cleaning time (excluding download time), h 4.0 1.72 1.48 0.60 0,5SledySledySledySledy 0,35 1,260,250,230,220,211.0 0,970,550,570,480,430,85 0,450,220,250,200,200,45 75,100 27 100 100 85 82 86 14.3 1.3 0.5 1.0 100 91 86 41 1.2 0.7 Compiled by L.Ivanova Editor N.Rogulich Tehred A.Kravchuk Proofreader I.Erdeyi Order 862/26 Circulation 464 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 100 100 100 91 85 82 86 86 41 0.5 1.0 1.2 0.7