SU1286619A1 - Method of producing brown coal wax - Google Patents

Abstract

The invention relates to the field of organic chemistry, namely to methods for processing coal by extraction with hydrocarbon solvents in order to obtain lignite wax, which is widely used in the chemical, leather, paper, electrical engineering and plastics industries. The method consists in extracting the brown coal with a gasoline fraction of pyrocondensate discharging at 70-190 ° C, and the extraction is carried out at 11-120 ° C. The solvent distillation from the wax is carried out in the presence of 0.5-1.0 wt.% 4-MeTmi-2j, 6-di-tert-butylphenol (ionyl). The method makes it possible to obtain lignite wax with a yield of up to 27% (4.5 times higher), to significantly improve the quality by reducing the resin content (by a factor of) and increasing the acid and saponification numbers, which makes it possible to eliminate the process of degassing during further processing wax 1 hp f-ly, 1 tab. i SL

Description

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This invention relates to organic chemistry, in particular, to methods for processing coal by extraction with organic solvents in order to obtain brown coal wax, which 5 is widely used in precision casting, chemical, leather, paper, electrical engineering, in the production of records and plastics.

The aim of the invention is to increase the yield and improve the quality of coal wax.

The gasoline fraction of the pyrocondensate is a waste of ethylene production by pyrolysis. As pyrolysis raw materials in EP-300 ethylene plants, use gasoline, gasoline-raffinate or their mixture. Extraction of brown coal is carried out on an integrated laboratory installation with a wax capacity of 2 kg per hour. Extraction parameters are taken from the existing raw lignite production line.

I

wax, namely the moisture of the coal entering the extraction, 17.8%; extraction time 25 minutes; size of coal grains is 1.0-0.2 mm. An example. 6 kg of brown coal with the indicated characteristics are loaded into the extractor and extracted at atmospheric pressure with a gasoline fraction of pyrocondensate (57 kg), boiled away20

25

thirty

also data on the extraction of brown COAL under similar conditions at the factory, i.e. using as a solvent gasoline with T.kip. 70 ° C, as well as with the addition of surfactant. Extraction time 25 min.

As follows from the table, the implementation of the proposed method allows to obtain the target product with a yield of up to 27%, which is 9 times higher than the factory technology, and 4.5 times higher than in the prototype. At the same time, the quality of the product is significantly improved: the amount of insoluble substances in gasoline decreases and the resin content (almost 3 times), the values of acid and saponification numbers increase, the wax becomes much lighter. In terms of its physico-chemical characteristics, the wax obtained by the proposed method occupies an intermediate position between the free and refined wax. With the wax-impregnated wax, it is brought together by some resin content, and with refined wax, by the color and high values of the acid and saponification numbers.

The use of a pyrocondensate gasoline fraction as an extractant, followed by its distillation from the target product, without the presence of antioxidant, is impossible, since the distillation temperature is much higher than

com wax. The use of ionol in the distillation of gasoline from wax obtained by the plant technology does not change its qualitative characteristics at 70–190 ° C, at 110–120 ° C in those-35 of the beginning of the decomposition of the labile component for 25 minutes. The reaction mixture is then separated by filtration to the residue of the extracted carbon and the liquid phase. Extracted brown coal may be sent for further processing after the release of the residual 40 dietary solvent, and the solvent is discharged from the liquid phase in the presence of 0.5-1.0% may. 4-methyl-2,6-di-tert-butylphenol (ionol). Solvent by treating the process temperature to

The increase in the lacquer wax when the gasoline fraction is extracted from the pyrocondensate is due to an increase of 120

can be reused for extraction. The residue after distilling off the solvent is the desired product, and its mass is the yield.

The data of experiments on extraction of brown coal with a gasoline fraction of pyrocondensate and distillation of the solvent from the target product in the presence of ionol, which allow to conclude about the influence of the proposed method on the yield and quality of brown coal wax, are tabulated. For comparison, see

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5 tO

0

five

0

also data on the extraction of brown COAL under similar conditions at the factory, i.e. using as a solvent gasoline with T.kip. 70 ° C, as well as with the addition of surfactant. Extraction time 25 min.

As follows from the table, the implementation of the proposed method allows to obtain the target product with a yield of up to 27%, which is 9 times higher than the factory technology, and 4.5 times higher than in the prototype. At the same time, the quality of the product is significantly improved: the amount of insoluble substances in gasoline decreases and the resin content (almost 3 times), the values of acid and saponification numbers increase, the wax becomes much lighter. In terms of its physico-chemical characteristics, the wax obtained by the proposed method occupies an intermediate position between the free and refined wax. With the wax-impregnated wax, it is brought together by some resin content, and with refined wax, by the color and high values of the acid and saponification numbers.

The use of a pyrocondensate gasoline fraction as an extractant, followed by its distillation from the target product, without the presence of antioxidant, is impossible, since the distillation temperature is much higher than

com wax. The use of ionol in the distillation of gasoline from wax obtained by the plant technology does not change its qualitative characteristics of the decomposition of labile components.

the onset of decomposition of labile components

process temperature up to

The increase in the lacquer wax when the gasoline fraction is extracted from the pyrocondensate is due to an increase of 120

and extracting an additional amount of wax substances, since a wide range of organic compounds of various classes are included in the gasoline fraction of the pyrocondensate.

Claims (2)

1. A method for producing a brown coal wax by extracting brown coal with a hydrocarbon solvent at an elevated temperature, followed by distilling off the solvent, about 1 h of 12–66194 u and with the fact that, in order to increase the presence of 4-methyl-2,6-di-tert-boonie, the yield and quality of wax, extra-tylphenol. This is carried out at 110-120 ° C using as a hydrocarbon 2. Method pop. 1, distinguishing the solvent of the gasoline fraction with and with the fact that 4-methyl-2,6-di-condensate boiling at 70-190 ° C, tert-butylphenol is used in the amount of solvent distillation. -1 wt.%. 2.8 Dark 82 brown 5.7 Dark 84 brown lindensation innovation e 25.7 0.4 26.3 0.5 26.0 0.6 27.1 0.7 27.0 0.8 27.0 Black 84 brown Brown 83 Light 84 brown Light 84 brown Dark 83 red Dark 84 red 0.9 26.7 Red 840.25 5.63 97.9 142.0 0.32 18.7 26.5 81.1 0.34 18.2 28.0 81.6 1.23 5.896.5 138.6 0.42 5.65 97.0 139.2 0.35 5.81 97.0 140.0 0.31 5.74 97.3 140.4 0.30 5.70 97.7 141.1 0.26 5.86 97.7 141.8 1.027.0 Red-84 yellow 1.127.0 Red- 84 yellow 1.0 2.8 Dark 81 brown Indicators on TU 39-01-232-76. Raw brown coal wax.  Table continuation 0.22 5.77 98.0 142.3 0.22 5.79 98.0 142, .1 0.32 18.5 26.2 81.4