SU364659A1 - METHOD OF OBTAINING SOLID HYDROCARBONS - Google Patents

Description

one

The invention relates to the refining industry and relates to a method for producing solid hydrocarbons, such as high melting waxes and a wax additive, to protect rubber products from ozone cracking.

A known method for producing a wax additive is that the gatch or the gatch fraction with m. Pl. 55-58 ° C and an oil content of 20-25% is deoiled with a temperature of (+5) - (- | -10) ° C, the resulting deiaf is obtained at this m. 5) - (0) ° С. The resulting paraffin wax after contact cleaning can be used as a wax additive. The disadvantages of this method include obtaining protective wax on two installations (de-oiling installation and dewaxing installation). The process using this technology is rather cumbersome; In order to obtain a wax additive in two plants, it is necessary to have two crystallization systems, four regeneration systems, as well as full working for two plants.

In order to simplify the process, it is proposed to perform deoiling at a temperature of (+5) - (-5) ° C until the oil content of 1.0-1.5% in the cake is given, followed by its deoiling at 20-25 ° C. In this case, high-melting paraffin with low oil content is obtained in the form of a solid phase, and protective wax in the form of a filtrate. The method is carried out as follows. The raw material (Gacha fraction) is shifted with the solvent and cooled in the molds to a temperature of (+5) - (-5) ° C. The mixture of raw materials with solvent is fed to the first stage.

filtration, where it is obtained a granule and filtrate of the first stage. The filtrate of the first stage is removed for regeneration, and the filter of the first stage is directed to the second stage of filtration.

Stage II filtrate returns to dilute the feed to the crystallizers. Shiver

Stage II should contain 1.0-1.5% oil. If this cannot be achieved, then it should be filtered through another step. Pellet with a content of 1.0-1.5%

the oil is diluted with a solvent to a temperature of 20-25 ° C and filtered on

III-stage filtration, where high-melting paraffin with low oil content (1.0%) is obtained as a solid phase and a wax additive (protective wax) with t. Il. As a liquid phase (third stage filtrate) is obtained. 50 ° C, with an oil content of less than 3%, with the amount of hydrocarbons that do not form complex compounds with urea, higher

40%. Staple III bag and step filtrate P1 are each sent to their own regeneration system to distill off the solvent.

To wash the cake, a solvent with the appropriate temperature is supplied.

The proposed method for producing solid hydrocarbons was tested in factory and laboratory conditions. Below are the results of these tests.

Example 1. In an industrial installation, a cake with an oil content of 1.4% is obtained from the Gacha fraction by demasing.

Solvent-acetone: benzene in the ratio of 30: 70.

The quality indicators of the initial gacha fraction and the resulting cake are given in table. one.

Table 1

1uskg1, as well as the requirements of TU-38-1-146-67 on

IN 1

table 2

; The pellet is diluted with a warm solvent in a ratio of 1: 4 to a temperature of 23 ° C and filtered under laboratory conditions. In this case, in the form of a solid phase, high-melting paraffin is obtained with m. Pl. 62 ° C and with an oil content of 0.6%, in the form of a filtrate - zapshtny wax with t. Pl. 50 ° C.

In tab. 2 shows the characteristic of high-melting paraffin, obtained protective

Thus, according to the proposed method, a protective wax can be obtained from the Gacha fraction by means of a single installation, which meets the requirements of TU-38-1-146-67 and high melting paraffip with a low content of oil.

Subject invention

The method of obtaining solid hydrocarbons and dehydrating Gache, characterized in that, in order to simplify the process, the bleaching is carried out at a temperature (-pb) - (-5) ° C to an oil content of 1.0-1.5% its subsequent deoiling at a temperature of 20-25 ° С.