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A method of continuously producing resin-removed lignite wax and resin and a device thereof

A montan wax and resin technology, which is applied in natural resin refining, mineral wax recovery/refining, petroleum industry, etc., can solve the problems of high resin content, low degree of automation, high solvent consumption, etc., to ensure acid value and saponification value, Low solvent consumption and high desolventization efficiency

Active Publication Date: 2014-03-26
QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic Shulan in Jilin and Xundian Wax Factory in Yunnan used to produce degreasing wax in a one-pot and indirect form of deresinization and wax desolvation. However, due to the difficulty in balanced control of the production process and the small scale of production, continuous large-scale production cannot be automated. Low degree, low yield of degreasing wax (about 70%), high resin content (about 10%), high solvent consumption (a ton of wax is more than 300kg), etc.

Method used

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  • A method of continuously producing resin-removed lignite wax and resin and a device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0020] The ambient temperature when the montan wax in step A enters the rotary extractor 1 is 10-20°C, and the temperature of the organic solvent is 13-17°C.

[0021] The weight ratio of the montan wax wax described in A step and fresh organic solvent is 1:1.

[0022] The degreased montan wax described in step B is melted and preheated to 90-100°C and sent to the desolventization device. The desolventization device is indirectly heated with saturated steam, directly stripped with superheated steam, and desolventized under an absolute pressure of 0.03Mpa.

[0023] The preheating temperature in step C is 90-100°C. The first steaming is the rising film long tube evaporation, and the second steaming is the falling film long tube evaporation, both of which are heated by saturated steam. Extraction; first steaming, second steaming, and stripping operations are evaporating and desolventizing under an absolute pressure of 0.03Mpa.

[0024] like figure 1As shown, the device of the pr...

Embodiment 1

[0031] With toluene as solvent, the weight ratio of montan wax to fresh organic solvent is 1:1.2. The montan wax with a particle size of 0.5~3mm is sent into the pan extractor 1 at a temperature of 10°C, and rotates with the operation of the pan extractor 1; the toluene in the solvent turnover tank 112 is cooled to 13°C, and then sprayed into the horizontal extraction device 1; toluene and montan wax countercurrent contact, the solvent circulation pump 104 will extract the toluene in the horizontal rotation extraction device 1 and then spray it into the horizontal rotation extraction device 1, so that the toluene is pressed Concentration gradient cycle contact with montan wax for mass transfer, such cycle leaching for 240min. The resin-rich toluene solvent is sent to the hydrocyclone 105 by the resin-rich solvent extraction pump 103, and the montan wax is separated and returned to the horizontal rotary extractor 1, and the rest enters the resin-rich solvent tank 3 for further ...

Embodiment 2

[0033] With ethyl acetate as the solvent, the weight ratio of montan wax to fresh organic solvent is 1:1. Send the montan wax with a particle size of 0.5~3mm into the pan extractor 1 at a temperature of 20°C, and rotate with the operation of the pan extractor 1; the ethyl acetate in the solvent turnover tank 112 passes through the solvent condenser 106 Cool down to 14°C, then spray into the rotary leaching device 1; ethyl acetate and montan wax are in countercurrent contact, and the solvent circulation pump 104 extracts the ethyl acetate in the rotary leaching device 1 and then sprays it into the rotary leaching device Device 1, make ethyl acetate circulate in contact with montan wax for mass transfer according to the concentration gradient, and leaching in this way for 150min. The resin-rich ethyl acetate solvent is sent to the hydrocyclone 105 by the resin-rich solvent extraction pump 103, and the montan wax therein is separated and returned to the horizontal rotation extrac...

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Abstract

The invention discloses a method of continuously producing resin-removed lignite wax and resin and a device thereof. The method includes continuously leaching lignite wax in a rotocel extractor by utilization of organic solvent, and removing the resin and recovering the solvent. The device comprises a solvent turnover pot, a leaching system, a solvent removing system of resin-removed lignite wax, a resin solvent removing system, a vacuum system and a steam distributor. According to the method and the device, a manner of low-temperature (lower than 20 DEG C) counter-current mass transfer and cyclic leaching is adopted. Benzene, toluene or ethyl acetate is adopted as the solvent, or a mixture of ethyl acetate and benzene or toluene is adopted as the solvent to highly dissolve the resin to be removed. The resin-removed lignite wax with high quality and the byproduct resin can be obtained by solvent removing treatment. The leaching efficiency is high and operation is cyclic. Large-scale continuous production is achieved. The yield of the resin-removed lignite wax is more than 80%. The resin content is lower than 5%. The solvent consumption is low with less than 100 kg of the solvent being consumed by per ton of the wax. A manner of removing the solvent under negative pressure is utilized, and therefore the solvent removing efficiency is high and the solvent removing temperature is low, decarboxylation of the lignite wax is prevented effectively and the acid value and the saponification number of the wax are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of montan wax production, and in particular relates to a method and a device for continuously producing degreasing montan wax co-production resin. Background technique [0002] Montan wax is a kind of fossilized animal and vegetable wax extracted from lignite, and the resin content in the wax is relatively high. The resin in montan wax belongs to the plant resin class, containing about 70% neutral substances (terpenes and polyterpenes) and 30% acidic substances (resin acids), which are of the same kind as fossilized amber, and some of its properties are similar In natural rosin. Degreasing wax is the wax obtained by removing the resin from montan wax. It is a product of montan wax upgrading, and it is also a light-colored refined wax raw material, which belongs to high-quality wax raw material. Resin has a great influence on product quality, such as making carbon paper sticky, glazing wax not smooth when w...

Claims

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Application Information

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IPC IPC(8): C10G73/00C09F1/02
Inventor 刘长胜罗国林
Owner QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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