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Oxidization fine purification albefaction method for montan wax

A technology for oxidative refining and montan wax, which is applied in the direction of oil/fat refining, fat production, etc., can solve the problems of food waste, glucose consumption, etc., and achieve the effects of low cost, simple operation and feasible technology

Inactive Publication Date: 2009-04-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this method is that glucose is only completely consumed as a reducing agent, which is equivalent to indirectly wasting food.

Method used

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  • Oxidization fine purification albefaction method for montan wax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A, 100 kilograms of thick montan wax flakes with a thickness of 1 to 4mm were placed in 400 liters of industrial grade ethyl acetate solvent and soaked for 24 hours, extracted 5 times at room temperature, and each extraction time was 24 hours, after which the liquid and solid were separated. phase, after reclaiming the residual ethyl acetate solvent in the solid phase, degreasing montan wax is obtained; after the extract solution dissolved with montan wax resin is evaporated and recovered ethyl acetate solvent for recycling, the residual solid is montan wax resin;

[0024] B. Put 50 kilograms of degreased montan wax in the above step A in a container with an agitator with an acid-resistant lining, add 200 kilograms of sulfuric acid solution with a concentration of 50%, heat it to 110°C under stirring, and add 10ml of YPSO dropwise -1, to prevent splashing, add 100 kilograms of concentration afterwards and be 50% sodium dichromate aqueous solution, control the reaction te...

Embodiment 2

[0030] A, 100 kilograms of thick montan wax flakes with a thickness of 1 to 3 mm were placed in 500 liters of industrial-grade ethyl acetate solvent and soaked for 15 hours, extracted 3 times at room temperature, and each extraction time was 15 hours, after which the liquid and solid were separated. phase, after reclaiming the residual ethyl acetate solvent in the solid phase, degreasing montan wax is obtained; after the extract solution dissolved with montan wax resin is evaporated and recovered ethyl acetate solvent for recycling, the residual solid is montan wax resin;

[0031] B. Put 50 kg of degreased montan wax in the above step A in a container with an agitator with an acid-resistant lining, add 300 kg of sulfuric acid solution with a concentration of 30%, heat up to 90°C under stirring, and add 10ml of YPSO dropwise -1, to prevent splashing, add 150 kilograms of concentration afterwards and be 40% potassium dichromate aqueous solution, control the reaction temperature t...

Embodiment 3

[0037] A, 100 kilograms of thick montan wax flakes with a thickness of 1 to 2 mm were placed in 600 liters of industrial grade ethyl acetate solvent and soaked for 5 hours, extracted 2 times at room temperature, and each extraction time was 5 hours, and then the liquid was separated from the solid phase, after reclaiming the residual ethyl acetate solvent in the solid phase, degreasing montan wax is obtained; after the extract solution dissolved with montan wax resin is evaporated and recovered ethyl acetate solvent for recycling, the residual solid is montan wax resin;

[0038] B. Put 50 kg of degreased montan wax in the above step A in a container with an agitator with an acid-resistant lining, add 150 kg of sulfuric acid solution with a concentration of 70%, heat up to 100°C under stirring, and add 10ml of YPSO dropwise -1, to prevent splashing, then add 125 kg of chromium dry aqueous solution with a concentration of 70%, control the reaction temperature at 120°C, stir and r...

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Abstract

The invention provides an oxidation refined blanching method of lignite wax; coarse lignite wax is used as a material; resin is removed by adopting an ethyl acetate solvent; section oxidation is carried out on the degreased wax by using the mixed liquid of bichromate and sulphuric acid; then acid washing, water washing, drying and shaping are carried out on the oxidized wax to obtain the finished product of refined lignite blanching wax. The Cr<6+> in the oxidation liquid during the oxidation process is basically reduced to Cr<3+>; a tannage liquid can be prepared by carrying out treatment on the oxidation liquid. The production technique of the method is convenient to be operated; the technology can be practical; the cost is low and the practicability is high; and the method can produce a tannage agent needed by the tannage production industry simultaneously when producing the refined lignite wax. Considering from the aspects of environment protection and pollution control, the technique has a realistic meaning.

Description

technical field [0001] The invention relates to an oxidative refining bleaching method, in particular to an oxidative refining bleaching method of montan wax, belonging to the technical fields of coal chemical industry and fine chemical industry. Background technique [0002] The wax extracted from lignite is an extremely complex mixture containing thousands of organic compounds, and it is often called crude wax. Due to the dark color of crude wax, it can only be used to make carbon paper, cables and other products that do not have special requirements for color, or as a black polish for shoe polish, leather products, etc. This kind of dark crude wax with small demand and low added value Wax obviously cannot be applied to the products of other industries, so that the scope of application of montan wax is greatly limited, and then restricts the development of montan wax industry. Various light-colored waxes obtained by degreasing, oxidizing and refining, and modifying crude ...

Claims

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Application Information

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IPC IPC(8): C11B3/08
Inventor 李宝才张惠芬角仕云何静戴伟锋李鹏
Owner KUNMING UNIV OF SCI & TECH
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