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Energy-saving efficient resin-removing method and device for coarse lignite wax

A montan wax and resin removal technology, applied in the field of coal chemical industry, can solve the problems of low resin removal efficiency, high resin content in wax, and low yield of degreasing wax, so as to save steam consumption, reduce the loss of pure wax, and save energy in the process and environmental protection

Active Publication Date: 2014-07-02
QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problems in the prior art are: low yield of degreasing wax (removed resin contains more wax components); high resin content in wax (low resin removal efficiency); high solvent consumption and high toxicity (especially aromatic hydrocarbons solvent); low extraction efficiency, long extraction time; large steam consumption (higher boiling point of solvent)

Method used

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  • Energy-saving efficient resin-removing method and device for coarse lignite wax
  • Energy-saving efficient resin-removing method and device for coarse lignite wax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, take the crude montan wax whose resin content accounts for 26.7%, after pulverization, sieve through sieves with apertures of 0.5 mm and 1.5 mm to remove fine powder and coarse particles, and obtain montan wax particles with a particle size of 0.5 to 1.5 mm; Put 50kg of montan wax particles and 250L of acetone solvent into the leaching device, soak and stir at 20°C for 4 hours, and then separate the solid and liquid to obtain the leaching solution and montan wax solids; put the montan wax solids into the separation device, heat Remove the remaining acetone by evaporation to obtain deresinized montan wax and acetone with a resin content of 1.6%; put the leaching solution in a separation container, add water to separate the resin from acetone, and obtain acetone insolubles and acetone aqueous solution through solid-liquid separation , the acetone aqueous solution recovers acetone through rectification, the separated water is recycled, and the ac...

Embodiment 2

[0045] Take the crude montan wax with a resin content of 28.4%, and after crushing, sieve through sieves with apertures of 1.5 mm and 3.0 mm to remove fine powder and coarse particles, and obtain montan wax particles with a particle size of 1.5 to 3.0 mm; crush and sieve the montan wax particles 30kg is placed in a continuous leaching device. Before the first leaching, the liquid level of acetone solvent in the leaching device is higher than the height of the pre-leached montan wax particles. During leaching, 30L of acetone solvent is gradually added, and continuously soaked for 4 hours at an ambient temperature of 10°C After the solid-liquid separation, the leaching solution and the montan wax solids are obtained; the montan wax solids are placed in a separation device, and the remaining acetone is removed through heating and evaporation to obtain deresinized montan wax and acetone with a resin content of 1.8%; Put the leaching solution into a separation container, add water t...

Embodiment 3

[0047] Take the crude montan wax with a resin content of 28.1%, crush it and sieve through sieves with apertures of 1.0 mm and 2.0 mm to remove fine powder and coarse particles, and obtain montan wax particles with a particle size of 1.0 to 2.0 mm; crush and sieve the montan wax particles Put 30kg into the leaching device, spray 240L of acetone solvent on the top of the lignite particles at an ambient temperature of 15°C, extract and spray the solvent leaked from the bottom, and separate the solid and liquid after 2 hours to obtain the leaching solution and solid montan wax Thing; Put the montan wax solid into the separation device, remove the remaining acetone through heating and evaporation, obtain the deresinized montan wax and acetone with a resin content of 1.4%; put the leaching solution into the separation container, add water to make the resin and acetone Acetone separation, acetone insoluble matter and acetone aqueous solution are obtained through solid-liquid separati...

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Abstract

The invention discloses an energy-saving efficient resin-removing method and device for coarse lignite wax. The resin-removing method comprises the following steps: smashing coarse lignite wax and sieving the smashed coarse lignite wax by a 0.5-3.0mm sieve; then, leaching the sieved lignite wax particles and acetone in a solid-to-liquid ratio of 1:1-1:8kg / L at constant temperature for 2-4 hours and separating to obtain a leaching liquid and a solid; placing the solid in a separating device, and heating, evaporating and removing residual acetone to obtain degreased lignite wax; placing the leaching liquid in a separating container, adding water to separate resin from acetone, and carrying out solid-liquid separation to obtain acetone insolubles and an acetone aqueous solution; and recovering acetone by rectifying the acetone aqueous solution; and evaporating the acetone insolubles to obtain walchowite. The degreasing device comprises a degreasing kettle, a ceride-removing desolventizing tank, a resin desolventizing separating tank, a rectifying device, an acetone storage tank and a condenser. According to the energy-saving efficient resin-removing method and device disclosed by the invention, as resin in lignite wax is easy to dissolve in acetone at constant temperature, wax and asphaltos are not dissolved, and the resin content in wax is reduced by digestion and separation at constant temperature, so that the device is simple and energy-saving and environment-friendly in process.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and specifically relates to an energy-saving and high-efficiency deresinizing method and device for crude montan wax that can effectively reduce the resin content in montan wax, have high yield of degreasing wax, and are energy-saving and environment-friendly. Background technique [0002] Montan wax generally refers to a natural hard wax containing pure wax, resin and bitumen extracted from waxy coal (mainly lignite or some peat) with organic solvents, also known as montan wax. Due to its superior physical and chemical properties, montan wax is widely used as a substitute and supplement for expensive natural animal wax and vegetable wax, and is an indispensable and important chemical product in the national economy. [0003] At present, the domestic crude montan wax resin content is as high as 23% to 30%, and some even exceed 30%, which has a relatively large negative impact on it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/00
Inventor 刘长胜罗国林
Owner QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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