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Method for preparing iron oxide red through bacterial oxidation

A technology of iron oxide red and bacterial oxidation, applied in biochemical equipment and methods, methods based on microorganisms, microorganisms, etc., can solve the problems of high cost and long production cycle, and achieve low production cost, shortened production cycle, and long production cycle short effect

Inactive Publication Date: 2015-01-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of long production cycle, need to prepare seed crystals and high cost in the current wet method for preparing iron oxide red, the present invention provides a method for preparing iron oxide red by oxidizing ferrous sulfate with acidophilic Thiobacillus ferrooxidans

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pour 200 mL of the prepared 9k medium into the Erlenmeyer flask, insert the preserved acidic Thiobacillus ferrooxidans into the medium, adjust the pH to 2.0, and then put it in a shaker at 28 °C and 180 rpm / min Cultivate for 24 hours to obtain the primary seed solution. Take 20 mL of the primary seed liquid and insert it into a new 180 mL 9k medium, adjust the pH value to 2.0, and cultivate under the same conditions for 24 hours to obtain the secondary seed liquid. Take 20 mL of the secondary seed solution and add 180 mL of FeSO with a ferrous ion concentration of 9.0 g / L 4 solution, add 0.6 g of (NH 4 ) 2 SO 4 , 0.1 g of K 2 HPO 4 , 0.1 g of MgSO4·7H2O, 0.02 g of KCl and 0.01 g of Ca(NO 3 ) 2 , adjust the pH to 2.0, and culture in a shaker at 28 °C and 180 rpm / min. When all ferrous ions in the solution are oxidized by ferric ions, adjust the pH value of the solution to 6.0 immediately, collect the precipitate after suction filtration, wash it repeatedly with di...

Embodiment 2

[0028]Pour 200 mL of the prepared 9k medium into the Erlenmeyer flask, insert the preserved Thiobacillus ferrooxidans into the medium, adjust the pH value to 2.5, and then put it in a shaker at 30 °C and 200 rpm / min Cultivate for 24 hours to obtain the primary seed solution. Take 20 mL of the primary seed liquid and insert it into a new 180 mL 9k medium, adjust the pH value to 2.5, and cultivate under the same conditions for 24 hours to obtain the secondary seed liquid. Take 20 mL of the secondary seed solution and add 180 mL of FeSO with a ferrous ion concentration of 15.0 g / L 4 To the solution, add 0.5 g of (NH 4 ) 2 SO 4 , 0.15 g of K 2 HPO 4 , 0.15 g of MgSO4·7H2O, 0.02 g of KCl and 0.02 g of Ca(NO 3 ) 2 , adjust the pH to 2.5, and culture in a shaker at 30 °C and 200 rpm / min. When all the ferrous ions in the solution are oxidized to ferric ions, immediately adjust the pH value of the solution to 8.0, collect the precipitate after suction filtration, wash it repeat...

Embodiment 3

[0030] Pour 200 mL of the prepared 9k medium into the Erlenmeyer flask, insert the preserved Thiobacillus ferrooxidans into the medium, adjust the pH value to 3.0, and then put it into a shaker at 31 °C and 240 rpm / min Cultivate for 24 hours to obtain the primary seed solution. Take 20 mL of primary seed liquid and insert it into new 180 mL 9k medium, adjust the pH value to 3.0, and cultivate under the same conditions for 24 hours to obtain secondary seed liquid. Take 20 mL of secondary seed solution and add 180 mL of FeSO4 solution with a ferrous ion concentration of 5.0 g / L, add 0.6 g of (NH4)2SO4, 0.1 g of K2HPO4, 0.1 g of MgSO4 7H2O, 0.02 g of KCl and 0.01 g of Ca(NO3)2, adjusted the pH to 3.0, and cultured on a shaker at 31 °C and 240 rpm / min. When all the ferrous ions in the solution are oxidized to ferric ions, immediately adjust the pH value of the solution to 10.0, collect the precipitate after suction filtration, wash it repeatedly with distilled water for 5 times, ...

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Abstract

The invention relates to a method for preparing iron oxide red through bacterial oxidation, belonging to the technical field of biochemical industry. The method comprises the steps of oxidizing ferrous sulfate by eosino-ferrous oxide thiobacillus to obtain ferric ion, adjusting the pH value of the solution to over 4.0, so as to precipitate all iron ions, finally, calcining at 400-800DEG C to obtain the product iron oxide red. The method has a short production process and a simple technology, does not prepare seed crystal, has low production cost, has no pollution to the environment, is very easy for industrial production, and provides an environmental-friendly efficient process route for production of iron oxide red.

Description

technical field [0001] The invention relates to a method for preparing iron oxide red, in particular to a method for preparing iron oxide red by using bacterial ferrous oxide ions, and belongs to the technical field of biochemical industry. Background technique [0002] Iron oxide red is the world's largest inorganic color pigment. It has many excellent properties such as non-toxicity, light resistance, high temperature resistance, acid and alkali resistance, high hiding power and tinting power. It is widely used in coatings, building materials, inks, rubber, electronics and telecommunications. And other fields, the market demand is large, the prospect is broad. [0003] At present, iron oxide red mainly has two types of production methods, namely dry method and wet method. The dry method mainly uses pure green vitriol, iron sludge and pyrite slag as raw materials, directly calcines at high temperature to obtain iron red, and then washes with distilled water to remove water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12R1/01
Inventor 张永奎李响周成显怡李盼禹王传凯
Owner SICHUAN UNIV
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