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Method for Synthesizing Fe-Carbon Internal Electrolytic Filler by In-Situ Carbothermal Reduction

A technology of synthesizing iron and internal electrolysis, applied in chemical instruments and methods, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc. High-level problems, to improve work efficiency, avoid excessive consumption of fillers, and achieve good results

Active Publication Date: 2019-01-01
山西德恒机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101423313B "Treatment process of fluorescent whitening agent production wastewater" discloses that iron-carbon fillers with mechanically mixed iron filings and activated carbon as active components are used for the treatment of organic wastewater. It is difficult for iron-carbon species in the filler to form uniform micro In the electrolytic cell, the iron-carbon material flow loss is large during continuous wastewater treatment, which is easy to harden, which is not conducive to the large-scale treatment and application of industrial wastewater, and the COD removal rate after iron-carbon reduction treatment is 40-50%
Chinese patent CN100540477C "A high-carbon metallized pellet for treating wastewater and its preparation method" discloses a high-carbon-content iron-carbon material preparation technology, and the prepared pellets are easy to fluidize and have good adsorption capacity for pollutants. Strong, but its COD removal rate is 50%, and a large amount of binder added in it will affect the working efficiency of the iron-carbon primary battery, form more sludge, and cause compaction
Chinese patent CN100566803C "a method for dispersing nano-iron particles" discloses an aqueous solution of nano-iron and activated carbon composition prepared by dispersing ultrafine nano-iron powder and activated carbon through a high-energy mill. The dispersion effect is stable and the penetration ability is strong, but the cost is high , nano-iron powder is easily deactivated in practical applications, and is not suitable for industrial wastewater treatment practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 50g of coal-based pitch, disperse it into 2kg of Fenton's reagent, the pH value of Fenton's reagent is 3.2, and the mass ratio of hydrogen peroxide and ferrous chloride in Fenton's reagent is 5:1, and then place in hydrothermal In the reaction kettle, after hydrothermal reaction at 150°C for 6 hours, add 20.5g of copper nitrate solution as an activity regulator, continue the hydrothermal reaction at 180°C for 8 hours, then centrifuge and dry at 120°C for 6 hours; then, place in a muffle In the furnace, iron-carbon inner electrolytic filler A was prepared after roasting at 720°C for 6 hours, and its specific gravity was 1.37t / m 3 , specific surface area 1.37m 2 / g, porosity 77%.

Embodiment 2

[0022] Weigh 50g of coal-based pitch and disperse it into 4kg of Fenton's reagent. The pH value of Fenton's reagent is 3.5. The mass ratio of hydrogen peroxide and ferrous sulfate in Fenton's reagent is 3:1, and then placed in a hydrothermal reaction In the still, after hydrothermal reaction at 200°C for 3 hours, add activity modifiers 40.5g cobalt nitrate and 40.5g cerium nitrate, continue hydrothermal reaction at 200°C for 5h, then centrifuge and dry at 150°C for 4h; then, Place it in a muffle furnace and bake it at 900°C for 4 hours to obtain the iron-carbon inner electrolytic filler B with a specific gravity of 1.5t / m 3 , specific surface area 1.54m 2 / g, porosity 83%.

Embodiment 3

[0024] Weigh 50g of coal-based pitch, disperse it into 500g of Fenton's reagent, the pH value of Fenton's reagent is 3.0, and the mass ratio of hydrogen peroxide and ferrous sulfate in Fenton's reagent is 8:1, and then placed in hydrothermal reaction In the still, after hydrothermal reaction at 250°C for 8 hours, add activity regulators 0.55g manganese nitrate and 0.55g copper nitrate, continue to react at 150°C for 3h, then centrifuge and dry at 130°C for 5h; then, Put it in a muffle furnace and bake it at 500°C for 8 hours to obtain an iron-carbon inner electrolytic filler C with a specific gravity of 1.4t / m 3 , specific surface area 1.46m 2 / g, porosity 81%.

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Abstract

The invention relates to the field of electrolytic packing preparation, and provides a method for synthesizing electrolytic packing in iron carbon through in-situ carbothermic reduction. The method comprises the following steps of oxidization modification, wherein coal pitch is dispersed into a Fenton reagent, the mass ratio of the coal pitch to the Fenton reagent is 1:(5-100), after a hydrothermal reaction is performed for 3-12 h at the temperature of 150 DEG C-250 DEG C, an active regulator is added, the hydrothermal reaction is continuously performed for 3-10 h at the temperature of 150 DEG C-200 DEG C, centrifugal separation is performed, and drying is performed for 4-6 h at the temperature of 120 DEG C-150 DEG C; in-situ reduction, wherein the obtained modified matter is roasted for 2-8 h at the temperature of 500 DEG C-1200 DEG C. The method is low in cost and simple in preparation process, and the prepared iron carbon packing is developed in pore structure and high in metal active component dispersity and wastewater treatment capacity.

Description

technical field [0001] The invention relates to the field of preparation of electrolytic fillers, in particular to a method for synthesizing electrolytic fillers in iron-carbon by in-situ carbothermal reduction. Background technique [0002] Iron-carbon micro-electrolysis reaction technology is currently an ideal process for treating refractory organic wastewater. It mainly uses regular high-efficiency electrochemical catalyzed iron-carbon inner electrolytic fillers to electrolyze organic matter in organic wastewater to achieve the degradation of organic pollutants. Purpose. At present, it has been disclosed that iron-carbon internal electrolytic fillers mostly use iron simple substance and carbon material as active components, and are prepared by methods such as bonding and sintering. Chinese patent CN101423313B "Treatment process of fluorescent whitening agent production wastewater" discloses that iron-carbon fillers with mechanically mixed iron filings and activated carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F9/06
CPCC02F1/461C02F1/66C02F7/00C02F9/00
Inventor 马世杰贾志奇
Owner 山西德恒机电科技有限公司
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