Method for preparing magnetic carbonized resin microspheres

A technology of resin microspheres and carbonized resins, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve problems such as unsatisfactory effects and residues, and achieve high mechanical strength, strong impact resistance, and strong adsorption. effect of effect

Inactive Publication Date: 2011-11-23
滕丽华
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are also adsorption methods that use resin as an adsorbent to directly adsorb pollutants in waste water. However, the effect of this method of decontamination with resin adsorption is not very satisfactory. There are still a large amount of sulfur and chromium remaining, and COD However, how to prepare a resin adsorbent with good adsorption effect, high mechanical strength, effective removal of sulfur and chromium in pollutants, and effective reduction of COD value has always been a research hotspot in this field.

Method used

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  • Method for preparing magnetic carbonized resin microspheres
  • Method for preparing magnetic carbonized resin microspheres
  • Method for preparing magnetic carbonized resin microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 0.2g of potassium ferricyanide in 50mL of distilled water, then add 2g of anion exchange resin D 280 , fully mixed and stirred at room temperature for 6 hours, fully washed with deionized water for 2 to 3 times, dried overnight at 80°C, and finally placed in a fixed bed reaction tube and roasted at 800°C for 6 hours under nitrogen protection. The nitrogen flow rate is 450ml·min -1 . Spherical carbon-based composites with strong magnetic properties and high crush strength were obtained.

[0029] The sample prepared in embodiment 1 is characterized and analyzed:

[0030] The D 280 (N 2 , 800℃) and Fe / D 280 (N 2 , 800°C) for characterization experiments, the results are shown in Table 1

[0031] Table 1 Specific surface area and porosity analysis data

[0032]

[0033] It can be seen from Table 1 above that: Fe / D 280 (N 2 , 800°C) has a specific surface area of ​​449m 2 / g, the adsorption mesopore volume is 0.247cm 3 / g; while D 280 (N 2 , 800°C) ...

Embodiment 2

[0037] use D 201 Carbonized resin is made raw material, and other is with embodiment 1.

Embodiment 3

[0039] use D 301 Carbonized resin is made raw material, and other is with embodiment 1.

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Abstract

The invention discloses a method for preparing magnetic carbonized resin microspheres, comprising the following steps of: (1) dissolving potassium ferricyanide into distilled water, then adding anion exchange resins, wherein the charging weight ratio of potassium ferricyanide to anion exchange resins is 1: (8-12) and the concentration of the anion exchange resins in the distilled water is 32-48g/L, and mixing and stirring for 5-8 hours at room temperature; and (2) washing the mixed and stirred material with deionized water for 2-3 times, drying and staying overnight at the temperature of 75-85 DEG C, and roasting for 5-7 hours in a fixed bed reaction tube at the temperature of 700-850 DEG C while nitrogen protective gas is introduced so as to obtain the magnetic carbonized resin microspheres, wherein the flow of nitrogen is 400-500ml/min. The method provided by the invention has the advantages of being simple to operate, capable of effectively reducing COD (chemical oxygen demand) value of leather plant waste water and capable of effectively reducing sulphur and chromium contents in the leather plant waste water.

Description

technical field [0001] The invention relates to a preparation method of magnetic carbonized resin microspheres. Background technique [0002] Due to the high concentration of pollutants and complex composition, leather wastewater has become one of the most difficult industrial wastewaters to treat. Due to the high concentration and chromaticity of organic matter, strong odor and strong toxicity, the treatment process of leather wastewater is long and complex. Generally, pretreatment is carried out first, followed by comprehensive treatment (a combination of physical, chemical, physicochemical methods, etc.). At present, the air flotation treatment and coagulation sedimentation processes commonly used in the comprehensive treatment will still cause secondary pollution of S, Cr, etc., and the BOD / COD value is still high, which will bring load to the biochemical treatment. Therefore, how to remove inorganic toxic substances such as S and Cr in wastewater and deeply reduce org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F103/24
Inventor 滕丽华唐天地张婕王志江
Owner 滕丽华
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