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Process for producing carbonyl iron

A production method, carbonyl iron technology, applied in the direction of carbonyl iron, etc., can solve the problems of difficult preparation, poor chemical stability, easy decomposition, etc., and achieve the effect of simple operation, short process and high metal recovery rate

Inactive Publication Date: 2006-08-23
JINCHUAN GROUP LIMITED
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Carbonyl iron has special properties and is widely used. It can be prepared by laboratory preparation or carbonylation metallurgy principle to make CO gas and Fe undergo selective carbonylation reaction. However, since carbonyl iron is a highly toxic, flammable and explosive substance, Its chemical stability is poor, it is easy to decompose when exposed to light and heat, and it is difficult to prepare for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 1000Kg of pig iron into the synthesis reactor, control the temperature of the synthesis reactor at 105°C and the pressure of 23.5Mpa, and feed CO gas with a flow rate of 5000L / h into the synthesis reactor. The CO content in the CO gas is ≥70%, O 2 <0.4%. After the reaction starts, pass the carbonyl compound gas drawn out into a condenser, control the condensation temperature at 25°C, and obtain 2302L of carbonyl iron liquid, pass the carbonyl iron liquid and CO gas through a three-stage separator, and the pressures are 23.5MPa, 10MPa, and At normal pressure, all the CO gas dissolved in the liquid is released to obtain the carbonyl iron product.

Embodiment 2

[0014] Put 1000Kg of pig iron into the synthesis reactor, control the temperature of the synthesis reactor at 155°C and the pressure of 17.5Mpa, and feed CO gas with a flow rate of 5000L / h into the synthesis reactor. The CO content in the CO gas is ≥70%, O 2 <0.4%. After the reaction starts, pass the carbonyl compound gas drawn out into a condenser, control the condensation temperature to 25°C, and obtain 2313L of carbonyl iron liquid, pass the carbonyl iron liquid and CO gas through a three-stage separator, and the pressures are 17.5MPa, 10MPa, and At normal pressure, all the CO gas dissolved in the liquid is released to obtain the carbonyl iron product.

Embodiment 3

[0016] Put 1000Kg of pig iron into the synthesis reactor, control the temperature of the synthesis reactor at 215°C and the pressure of 12.5Mpa, and feed CO gas with a flow rate of 5000L / h into the synthesis reactor. The CO content in the CO gas is ≥70%, O 2 <0.4%. After the reaction starts, pass the carbonyl compound gas drawn out into a condenser, control the condensation temperature at 25°C, and obtain 2309L of carbonyl iron liquid, pass the carbonyl iron liquid and CO gas through a three-stage separator, and the pressures are 12.5MPa, 5MPa, and At normal pressure, all the CO gas dissolved in the liquid is released to obtain the carbonyl iron product.

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Abstract

The present invention is process of producing carbonyl iron. Pig iron and CO as material are reacted at pressure of 15-25MPa and temperature of 100-250deg.c to produce gaseous carbonyl iron; and gaseous carbonyl iron is then condensed to obtain the liquid carbonyl iron product. The present invention prepares liquid carbonyl iron through the carbonyl process, and the production process has high safety, short process, simple operation, no í‹three-wasteíŒ exhaust and high metal recovering rate and is suitable for industrial production.

Description

technical field [0001] The invention relates to a production method of carbonyl iron. Background technique [0002] Carbonyl iron molecular formula is Fe(CO) 5 , is a viscous yellow liquid with a boiling point of 102.8°C and a melting point of -21°C. Carbonyl iron liquid is used in catalysts, additives, plasticizers and other fields, and has a special purpose. Pure iron powder can be obtained after thermal decomposition of carbonyl iron, which is widely used in chemical metallurgy, special materials, functional materials, catalysts, hard alloys and other fields due to its special chemical purity and physical and chemical properties. [0003] Carbonyl iron has special properties and is widely used. It can be prepared by laboratory preparation or carbonylation metallurgy principle to make CO gas and Fe undergo selective carbonylation reaction. However, since carbonyl iron is a highly toxic, flammable and explosive substance, Its chemical stability is poor, it is easy to dec...

Claims

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Application Information

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IPC IPC(8): C01G49/16
Inventor 李永军谭世雄张强林肖冬明王多冬甘振君刘俊李朝平
Owner JINCHUAN GROUP LIMITED
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