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Purification method and system of lignite wax crude extract

A purification method and crude extraction technology are applied in the field of purification of lignite crude wax extract, and achieve the effects of low solvent residue, increased economic value and high purity

Pending Publication Date: 2022-05-20
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems existing in the existing montan wax purification field, the present invention provides a method for purifying the crude montan wax extract

Method used

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  • Purification method and system of lignite wax crude extract
  • Purification method and system of lignite wax crude extract
  • Purification method and system of lignite wax crude extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] use figure 1 The system purifies the crude montan wax extract raw material, crushes 50g of the montan wax crude extract raw material to 20-50 mesh, puts it into the extraction tank, and removes the CO in the solvent tank 2 After being pressurized to 30MPa by the solvent pump, it is preheated to 35°C by the preheater and 400mL is passed into the extraction tank; the temperature in the extraction tank is controlled at 35°C and the pressure is 30MPa. After reacting for 2 hours, the raffinate in the lower layer of the extraction tank enters the flash tower to be separated from the solvent, and asphalt is precipitated. The solvent and extract in the upper layer of the extraction tank are slowly heated to 40°C and then enter the separator I; the montan wax in the lower layer of the separator I enters the flash tower. The distillation tower I is further separated from the solvent, and the montan wax is precipitated. The solvent and extract in the upper layer of the separator I...

Embodiment 2

[0076] use figure 2 The system purifies the crude montan wax extract raw material, crushes 50g of the montan wax crude extract raw material to 20-50 mesh, puts it into the extraction tank, and the CO in the solvent tank 2 and the ethanol in the entrainer tank are respectively pressurized to 30MPa by the solvent pump and then enter the mixer to mix to obtain the extractant, CO 2 The molar ratio with ethanol is 1:0.04, the extractant is preheated to 35°C by a preheater, and then 400mL of extractant is passed into the extraction tank; the temperature in the extraction tank is controlled at 35°C and the pressure is 30MPa. After reacting for 2 hours, the raffinate in the lower layer of the extraction tank enters the flash tower for separation, and the asphalt is precipitated. The solvent and extract in the upper layer of the extraction tank are slowly heated to 40°C and then enter the separator I; the montan wax in the lower layer of the separator I enters the flash tower I is fu...

Embodiment 3

[0080] use figure 2 The system purifies the crude montan wax extract raw material, crushes 50g of the montan wax crude extract raw material to 20-50 mesh, puts it into the extraction tank, and the CO in the solvent tank 2 and the ethanol in the entrainer tank are respectively pressurized to 30MPa by the solvent pump and then enter the mixer to mix to obtain the extractant, CO 2 The molar ratio with ethanol is 1:0.04, the extractant is preheated to 40°C by a preheater, and then 400mL of extractant is passed into the extraction tank; the temperature in the extraction tank is controlled at 40°C and the pressure is 30MPa. After reacting for 4 hours, the raffinate in the lower layer of the extraction tank enters the flash tower for separation, and the asphalt is precipitated. The solvent and extract in the upper layer of the extraction tank are slowly heated to 40°C and then enter the separator I; the montan wax in the lower layer of the separator I enters the flash tower I is fu...

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Abstract

The invention aims to provide a purification method of a lignite wax crude extract, which comprises the following steps: S2, extracting a lignite wax crude extract raw material by using an extracting agent to obtain an extract and a raffinate; wherein the extraction agent comprises a supercritical solvent and an optional entrainer. Compared with a traditional solvent washing method, the method for purifying the product from the lignite wax crude extract is low in energy consumption, the obtained wax product is high in quality, the obtained lignite wax product is high in purity, low in solvent residue and high in economic value, meanwhile, the lignite resin is high in purity, and the economic value is greatly increased.

Description

technical field [0001] The invention relates to the field of montan wax purification, in particular to a method and system for purifying lignite crude wax extract. Background technique [0002] The main components of montan wax are pure wax, resin and asphalt, and the composition of montan wax extracted from coal in different coal-forming plants and coal-forming environments is different. In the crude wax of German montan wax, the resin content is generally 10-30% lower, which can basically directly meet the needs of many industrial applications; in the crude wax of Chinese montan wax, the resin content is usually higher in 20-50%. Too much resin can make montan wax sticky. The influence of asphalt in montan wax affects its viscosity, chroma and utilization pathway, affects the co-solubility of montan wax and other additives, deteriorates the physical and chemical properties and mechanical properties of montan wax, and also affects the subsequent refining process of montan ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/00B01D11/00B01D11/04C09F1/02
CPCC10G73/00B01D11/00B01D11/0403C09F1/02
Inventor 张翠清张中华李晓峰芦海云
Owner CHNA ENERGY INVESTMENT CORP LTD