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Method for co-producing resin and montan wax from lignite

A technology of montan wax and lignite, which is applied in the field of montan wax preparation, can solve the problems of high wax loss, low resin purity, and inability to achieve the effect of high co-production rate and simple operation

Active Publication Date: 2021-03-16
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in the existing montan wax extraction process, the lignite crude wax is extracted first, and then the lignite crude wax is degreased, resulting in high wax loss, and the resin in the degreasing product has low purity and cannot be used as a product.

Method used

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  • Method for co-producing resin and montan wax from lignite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment is used to illustrate the method for the co-production of resin and montan wax by lignite of the present invention.

[0043] (1) Take 50g of lignite particles and 200g of ethyl acetate and stir and mix at 15°C and 100r / min for 3h to carry out the first extraction treatment, and then centrifuge to obtain a liquid phase and a solid phase;

[0044] (2) The gained liquid phase is evaporated to obtain the resin product, and the steam is condensed and refluxed to obtain ethyl acetate;

[0045] (3) After the solid phase obtained in step (1) was heated at 60°C for 1h to evaporate the remaining solvent, it was stirred and mixed with 200g of toluene at 80°C and 100r / min for 1h to carry out the second extraction treatment, then filtered, and the filtrate was evaporated to obtain For montan wax products, steam is condensed and refluxed to obtain toluene; the filter cake is dried to obtain degreasing and dewaxed lignite products.

[0046] Wherein, the content of relev...

Embodiment 2

[0048] This embodiment is used to illustrate the method for the co-production of resin and montan wax by lignite of the present invention.

[0049] (1) Take 50g lignite particles and 150g methyl acetate and stir and mix at 20°C and 100r / min for 2h to carry out the first extraction treatment, and then centrifuge to obtain liquid phase and solid phase;

[0050] (2) Rotary evaporation of the gained liquid phase is carried out to obtain a resin product, and the steam is condensed and refluxed to obtain methyl acetate;

[0051] (3) After the solid phase obtained in step (1) was heated at 50°C for 1.5h to evaporate the remaining solvent, it was stirred and mixed with 180g of toluene at 90°C and 100r / min for 1.5h to carry out the second extraction treatment, and then filtered, and the filtrate The montan wax product is obtained by rotary evaporation, the steam is condensed and refluxed to obtain toluene; the degreasing and dewaxing lignite product is obtained by drying the filter cak...

Embodiment 3

[0054] This embodiment is used to illustrate the method for the co-production of resin and montan wax by lignite of the present invention.

[0055] According to the method described in embodiment 1, wherein the duration of the first extraction process in step (1) is 6 hours.

[0056] The resin product and the montan wax product are finally obtained, and the relevant component contents thereof are shown in Table 1, and the resin yield and the montan wax yield are shown in Table 2.

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Abstract

The invention relates to the field of preparation of montan wax, particularly to a method for co-producing a resin and montan wax from lignite. The method comprises: (1) carrying out first extractiontreatment on lignite particles and a first solvent to extract fat, and carrying out solid-liquid separation to obtain a first solid phase and a first liquid phase; (2) evaporating the first liquid phase to separate a resin and the first solvent; and (3) carrying out second extraction treatment on the first solid phase and a second solvent to extract wax, carrying out solid-liquid separation to obtain a second solid phase and a second liquid phase, and removing the solvent from the second liquid phase to prepare montan wax. According to the present invention, with the method, the high-purity resin product and the low-resin montan wax can be directly prepared from lignite, the co-production yield is high, the operation is simple, and the method is suitable for industrial application.

Description

technical field [0001] The invention relates to the field of montan wax preparation, in particular to a method for co-producing resin and montan wax from lignite. Background technique [0002] Montan wax is a mineral wax containing wax, resin and bitumen extracted from lignite by using organic solvents. The composition of montan wax extracted from coal in different coal-forming plants and coal-forming environments is different. The chemical composition of montan wax is complex, it has good physical and chemical properties, and it has no carcinogenic effect. The characteristics of montan wax are high melting point, hard and brittle, moisture resistance, good chemical stability, high mechanical strength, bright mirror-like surface, and low conductivity. And it can be melted together with other waxes, such as paraffin, beeswax, stearic acid and ozokerite, as well as some synthetic materials, such as polyethylene and polypropylene, to form a uniform wax paste. Therefore, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/36C10G1/04
Inventor 张中华张翠清崔鑫赵帅
Owner CHNA ENERGY INVESTMENT CORP LTD