SU715611A1 - Method of gasoline purification from sulfuric and acidic compounds - Google Patents

Description

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The invention relates to the field of oil refining, oil refining, in particular, liquid oil, hydrocarbons - gasolines from sulfur, sulfurous and acidic compounds. The oil can be applied at refineries in the petrochemical industry.

A known method of purification of gasolines is adsorbed on solid adsorbents: molecular sieves, bauxite, etc., {. Closer to the invention is the cleaning method by alkaline washing with caustic soda ZJ.

In the implementation of a known oisoba solution, the silkworms quickly work and need to be replaced periodically.

During the operation of the replacement of the alkali solution (pumping out the treated solution and pumping fresh), the cleaning of the solution is disturbed, the quality of the cleaned material is deteriorated.

As the liquor ly solution triggers, the cleaning of the mortar worsens in the loop of the junction mode.

Periodic skidding of alkali with gasoline into the tanks leads to the loss of the finished gasoline during tank cleaning.

The problem of using waste; The tree is still solved (dumped). The aim of the invention is to increase the efficiency of the cleaning process, namely the degree of cleaning of gasoline, to ensure a sustainable process, thereby achieving constant quality of gasoline, intensifying the process continuous process) to liquidation. production wastes (sulfur bumps).

According to the invention, gasoline is washed with water with a nosleduk dei treatment 2-. 5% - “th aqueous solution of monoethanolamine and re-washing the resulting product with water.

The desired treatment with mono-ethanols is carried out in a pump.

In addition, it is desirable to conduct the process with the weight ratio of gasoline and 37 of 1-ionoethanolamine solution equal to 0.5: 11: 1 and the ratio of gasoline and water equal to 1; 0.8-1: 1. After purification, monoethanolamine (MEA) iodine regenerates and circulates by known methods, and gasoline impurities not recovered in the regeneration process are adsorbed with activated carbon from the regenerated monoethanolamine solution. The drawing shows a schematic flowchart for the purification of gasoline from cepiaHCTbfx and acidic compounds according to the invention. The source gasoline enters the wash column 1, where the primary removal of water-soluble impurities takes place, settles in the sump 2 and is sent to the suction line of apparatus 3. This is also supplied with the MEA solution from tank 4. Oles enters the absorber pump Z. where the process of absorption of sulfur and acid compounds proceeds vigorously and is fed into a sump 5, where rapid separation of the phases takes place: from the bottom - saturated a sorbent which is fed to the desorption of the stripper 6, from above - purified benznn which is guided for dopolnitelshoy gfomyshlennoy washing water in the sump 7 and then is discharged into tanks tovarnogChe park. The proposed method is implemented under the following process conditions: 1 Pressure in the absorber, atti4-6 Absorption temperature, ° C35-45 Water washing temperature, "C30-50 Desorber temperature, top 102-105 niza112-115 Pressure in desorber, attiDo 0.7 Under the following conditions, gasoline indicators are shown in the table: MEA solution concentration, wt.% Gasoline to MEA ratio (weight) Consumption coefficient of MEA per 1 ton of gasoline, kg / tOD1 Gasoline to water ratio (weight) 1: 0 , 8 The consumption coefficient of industrial water per 1. t (gasoline, W / t0,8

Claims (2)

Total sulfur content,. wt.% Up to 0.4 To 0.25 Hydrogen sulphide content,. Weight.% Up to 0.1 No Acidity, mg KOH per 1OO ml of gasoline Up to 6.5 To 0.05 Claim 1. The method of cleaning gasoline from sulfur and acid compounds using an alkaline wash with reagents, characterized in that, in order to increase the efficiency of the process, the gasoline is washed with water followed by treatment with a 2-5% aqueous solution up to 0.4 up to 0.2 up to 0.1 None up to 6.5 To 0.04 rum monoethanolamine and re-washing the resulting product with water. 2. The method according to claim 1, wherein the treatment with monoethanolamine is carried out in a pump. but. A method according to claim 1, in which the process is carried out with a weight ratio of gasoline and 5-7156116 a solution of monoethanolamine, 0.5: 1-1. Berlin I. I. Oil refining n light 1: 1, gasoline and water, equal to 1: 0.8-1: 1. Sources of information taken in vnvmanve during examination oil products. TsNIIPI. M ,, 1965, p. 7 2. Ibid, p. 5 (prototype).