SU1004449A1 - Method for deparaffinizing oil cuts - Google Patents

Description

(54) METHOD OF DEFINITION the raw material solution, separating the oil kohvosterat from gacha followed by deactivation of the latter) on continuous drum vacuum filters by supplying a solvent for rinsing amplifier Cl3 because of the lack of technical means for cleaning Gacha contains oil therein, even with a significant increase in the supply of solvent for washing, remains high, so the main direction of increasing odds, separating paraffin crystals from oil is reducing its concentration in the liquid phase of the suspension, as this greatly reduces oil washout. from the precipitate of paraffins when washing on the filter with a solvent. Snvg

The oil concentration of the oil in the suspension can be reduced by simply increasing the dilution of the raw material with a pure solvent, but this is expensive because the production of the need to take a large amount of the solution of the body and cool the suspension to a lower temperature is reduced. In addition, the supply of more than 1% w wrs raw material and liquid liquid type slightly affects the completeness of washing oil from gacha. There is a method of two-step dvarafinkization of oil fractions of oil with selective solvents, which consists of the following main stages: heat treatment of the raw material, dilution with a solvent, cooling of the raw material solution, separation of paraffin crystals from the liquid phase of filtrapium with washing of the gachi cake dissolve the solvent. After the first filtration stage, the solid precipitate melts. After washing, the gachi pellet is blown off with an inert gas, removed with a knife and conveyed to the container by the screw. In the auger the screw is diluted with a solvent and fed to filters II cTjTteHH. Gachi cake and stiteny are washed with a solvent and then sent to the regeneration of the solvent: the filtrate of the second stage after cooling is used to dilute the raw material before the filters of the first stage. In order to improve the oil washout with two-stage dewaxing, the redistribution of the supply of the solvent and the recycle filter to the raw material and the washing of the sediment is dried out: the whole amount of dry solvent is supplied to the washing 0 returns to the dilution of the raw material in the crystal: congestion The disadvantage of the known method is in 1L that even during processing it is distilled: the PO of the raw material creates conditions for the clotting of solid matter. The basics (during the processing of residual raw materials, such polymers are created specifically by using various additives), which binds the oil solution and limits the solvent consumption for washing because of low porosity, therefore, for a higher extraction of oil and a decrease in oil content in the heap, it is necessary to recrystallize solid hydrocarbons At one of the stages of pre-washing sediment. The purpose of the invention is to reduce the oil content in the solid sediment and increase oil recovery. The goal is achieved by the fact that in the method of dewaxing oil oil fractions by cooling and mixing them with a solvent with rinsing of solid sediment and npo-i by filtering solid sediment after the first filtration stage after the first filtration stage, the solid precipitate after the first filtration stage is dispersed and mixed with dispersed cooled solvent. In the proposed method, the flow of dry solvent to the first stage sludge is reduced (up to 1-2 per filter) and in augers of filters of the first stage (up to 1 MV4 for each filter); the solid precipitate is melted from the filters of the first degree due to heating up to 6O100 of a part of the precipitate and returning it for mixing with the initial precipitate; the molten precipitate before the second-stage filters is subjected to recrystallization due to the cold of the released dry solvent and the dispersion of the nozzles and the subsequent mixing of the dispersed streams of the molten precipitate and the dry solvent, PM. At the industrial depot installation (}, the method of dewaxing the oil fractions of oil is carried out; the crystallization scheme of the oil before the first stage filters remains unchanged.

Raw dewaxing plant

Performance, MV4

Submission of wet solvent to the N92 installer,

Dilution filtrate consumption, m / h

The cooling temperature of the mixture before the filters of the first stage, C

Consumption of dry solvent, m / h:

a) for industrial; first stage filters

The raffinate fraction 420-500 ° C as the mixture of West Siberian oil

20

2O 40

minus 22

b) in the first stage filter augers

c) to flush the second

steps

d) on the pyrekrstalisasppo raspapavletsnogo sediment with filters of the first stage, ° C

Dry solvent temperature for washing filters, С

a) first stage

b) second stage

The temperature will return for spraying solid sediment from the filters. As can be seen from the data in the method according to the invention, the oil content is lower and the oil withdrawal is increased. Ph, o m m o l a and 3 o bre n i e Method of dewaxing oil –fractions of oil by two-stage filtration of the cooled mixture with solvent and washing the resulting sediment at a solid precipitate and intermediate melting of the solid precipitate after the first stage filtering, from the continuation table

ten

30 minus 22

kanus 5 characterized in that, in order to reduce the oil content in the solid sediment and increase the oil recovery, the melted solid residue after the first filtration stage is dispersed and mixed with the dispersed cooled solvent. Sources of information taken into account in the examination 1. Chemicals and fuel and oil technologists. 1964, №1O, p. 23-28. 2. D. O. Galdberg and others. Oviaaochnye oils from oils of eastern deposits. M., Himi, 1972, p. 117-119 (protyp.).

Claims (1)

Claim The method of dewaxing oil fractions of oil by two-stage filtration of a cooled mixture of them with a solvent, washing the solid precipitate formed during filtration and intermediate melting of the solid precipitate after the first filtration step, characterized in that, in order to reduce the oil content in the solid precipitate and increase oil selection, the molten solid precipitate after the first · stage of filtration is dispersed and mixed with a dispersed cooled solvent.