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Microbial-catalytic synthesizing method of pyrite ammonia alum

A microbial and jarosite technology, which is applied in the field of microbial catalyzed synthesis of jarosite, can solve the problems of low product purity, low yield, and red doping, and achieve the effects of high purity, uniform particles, and simple operation

Inactive Publication Date: 2003-08-27
南京贝克特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the reactant ferric sulfate reacts with hydroxide ions when the pH is higher than 2.7, and immediately generates ferric hydroxide colloid, the product contains impurities such as red ferric hydroxide colloid or red amorphous hydroxy ferric sulfate precipitate, As a result, the purity of the product is not high, the yield is not high, and it is doped with red
The other is based on ferrous sulfate and K 2 SO 4 、K 2 CO 3 or KOH as reactant, with H 2 o 2 or KClO 3 or KMnO 4 It is an oxidant, which is generated by stirring in the range of pH value from 1.5 to 3.5 and under boiling conditions, but this method needs to be carried out under high temperature conditions, heating equipment is required, the cost is high, and the energy consumption is large

Method used

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  • Microbial-catalytic synthesizing method of pyrite ammonia alum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: KFe 3 (SO 4 ) 2 (OH) 6

[0019] Add 6.95g FeSO to the reactor 4 ·7H 2 O and 0.725gK 2 SO 4 , dissolved in 50ml of distilled water, adjusted to pH 2.5 with KOH or sulfuric acid; T.ferrooxidans LX 5 Bacterial cells were added to the reaction solution to make the number reach 10 7 About one / ml; under normal temperature and pressure (25°C and one atmospheric pressure) aeration and stirring for 3 days, stop stirring and let it settle naturally; collect the precipitate with ordinary filter paper, wash twice with distilled water acidified with sulfuric acid (pH1.5) , and then washed twice with distilled water until there was no SO in the washing solution 4 2- until. Dry at 50-60°C for about 3 hours to obtain the dry product KFe 3 (SO 4 ) 2 (OH) 6 3.84 g, 92% yield. The product is yellow crystal particles with uniform size, and the particle size is about 10-15μ.

[0020] The microorganism Thiobacillus ferrooxidans LX that is used for catalysis in the...

Embodiment 2

[0023] IR (KBr): cm -1 3383(OH), 1634, 1191, 1087, 627, 1004, 511, 427. This identification result is consistent with KFe 3 (SO 4 ) 2 (OH) 6 The results for the standard were in perfect agreement. Example 2: NaFe 3 (SO 4 ) 2 (OH) 6 Synthesis

[0024] Add 27.8g FeSO to the reactor 4 ·7H 2 O and 2.37gNa 2 SO 4 , dissolved in 100ml distilled water, adjusted to pH 2.0 with NaOH or sulfuric acid; T.ferrooxidans LX 5 Bacterial cells were added to the reaction solution to make the number reach about 10 8 pc / ml; under normal temperature and pressure (25°C and 1 atmospheric pressure) aeration and stirring for 2 days, stop stirring and allow it to settle naturally; the precipitate was collected with ordinary filter paper, washed twice with distilled water acidified with sulfuric acid (pH1.5), Then wash 2-3 times with distilled water until there is no SO in the washing solution. 4 2- until. Dry at 95° C. for about 2 hours to obtain 13.90 g of dried product with a yield o...

Embodiment 3

[0028] The results of this identification and NaFe 3 (SO 4 ) 2 (OH) 6 The results for the standard were in perfect agreement. Example 3: NH 4 Fe 3 (SO 4 ) 2 (OH) 6 Synthesis

[0029] Add 13.9g FeSO to the reactor 4 ·7H 2 O and 2.17g (NH 4 ) 2 SO 4 , dissolved in 100ml distilled water, adjusted to pH 2.5 with ammonia or sulfuric acid; T.ferrooxidans LX 5 Bacterial cells were added to the reaction solution to make the number reach 10 8 About one / ml; under normal temperature and pressure (25°C and one atmospheric pressure) aeration and stirring for 2 days, stop stirring and let it settle naturally; collect the precipitate with ordinary filter paper, wash twice with distilled water acidified with sulfuric acid (pH1.5) , and then washed 2-3 times with distilled water until there is no SO in the washing solution 4 2-until. Dry at 50-60° C. for about 2-3 hours to obtain 14.05 g of dry product with a yield of 88%.

[0030] The product is yellow crystal particles wit...

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Abstract

The invention discloses a microbial catalytic synthesizing method of pyrites vanadium. It uses ferrosi sulfate and one of potassium sulfate, sodium sulfate and ammonia sulfate as the reaction matters, distilled water as reaction medium, and Thiobacillus ferrooxidans LX5 as catalytic oxidizer, blends by ventilating for 1-3 days to make reaction, filters and collects the deposit, washes by the acidified distilled water by vitriol, then washes by distilled water, and at least dries to get the pyrites vanadium. The reaction is at ordinary temperature and pressure.

Description

1. Technical field [0001] The invention relates to a method for synthesizing jarosite by microorganism catalysis. 2. Background technology [0002] Because inorganic yellow pigments generally contain toxic heavy metals such as lead, cadmium, and chromium, and have poor weather resistance, they are easy to fade, especially not resistant to SO in the atmosphere. 2 Corrosive by acid gas and acid rain, so its application in many fields including painting etc. is limited. [0003] Therefore, people began to use jarosite as a yellow inorganic pigment for painting and the like. The molecular formula of jarosite is MFe 3 (SO 4 ) 2 (OH) 6 (M=K, Na or NH 4 ), has the characteristics of strong hiding power, good weather resistance, non-toxicity, good acid resistance, and can make paintings and other long-term preservation without changing color. [0004] However, natural jarosite crystals are rare in nature, and are often associated with various impurities such as barite, galena...

Claims

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Application Information

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IPC IPC(8): C12P3/00
Inventor 周立祥周顺桂
Owner 南京贝克特环保科技有限公司
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