SU20239A1 - Method for isolating the soapbox - Google Patents

Description

The proposed image relates to

to methods of excretion; soapbox from

resulting from the cleaning. petroleum

Distillates of Alkaline Waste By

rtsalivani last.

Usually, to isolate myolaph, alkaline wastes, which are obtained during the purification of petroleum distillates (solution of yaften soap), are pumped into special tanks and are subjected to a slow

boiling with water vapor flowing through pipe coils. In some cases, the designated alkaline dusts, before they fall into

The above boiling steamers are pre-boiled in special iron boxes or boilers heated with direct fire. Upon reaching the required specific concentration of the solution, a saturated solution of the first salt or dry salt in the powder is fed into the vat in one way or another, after which salification begins, which means that release of naphthenic soaps from the solution, collecting on the surface of the liquid

;. (brine) in the form of more or less dense

g mass of color from light yellow to dark brown. Then, at the end of the salting out process, the new soaps obtained with naphtha undergo compaction by evaporation to a content of 51-g53%

organic matter. However, not always after salting out naphthenic soaps, a sharp separation of the solution into soap and brine occurs. In most cases, an intermediate layer is formed between salted soaping paper (naphthenic soaps) and brine, which is highly enriched in a mixture of sodium chloride and glauber salt. Often the amount of this glue reaches 40-50% of the weight of the processed mass, due to which the yield of the useful product decreases and the productivity decreases, and the need for additional fuel for processing the glue mixed with fresh alkaline waste into the useful product greatly increases the cost of the latter. Along with this, the resulting glue, highly enriched with a mixture of sodium chloride and sulphate salts, burns with a hard crust to the coils of the milk-oil tank, which makes it extremely difficult to transfer heat from the water pads circulating through the coil pipes to alkaline wastes and many times the process of compaction naphthenic soap, where mylonaph is obtained with a significant content of sodium chloride and sulphate salts, reaching up to 15%.

For the purpose of) the above mentioned; disadvantages in the proposed method

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The alkaline wastes obtained during the purification of naphthenic V distillates are acidified before salinization so that only a very small amount of free naphthenic acids is released.

The method consists in the fact that the alkaline wastes that are obtained during the purification of naphthenic distillates are loaded into any dishes (tank, boiler, etc.) and treated with some acid, which is convenient to use sulfuric acid of one or another strength in the refineries. or acidic waste (sour tar). After this treatment, carried out with stirring until a slight decomposition of the naphthenic soaps with the release of a very small film of naphthenic acids, the above alkaline wastes are treated with sodium chloride, which can be introduced either in a dry form or as a saturated solution. Following the addition of table salt, an intensive separation of the bilium (drying) on the surface of the yalonafta begins slowly, which later can easily be separated from the brine in one way or another by either desoldering the salt or removing it from the surface.

The subject of the patent.

The method for separating mylonaph from the alkaline waste generated during the purification of petroleum distillates is the loss of salting of the latter, characterized in that the alkaline waste is acidified before it is acidified so that only very small amounts of free naphthenic acids are released.