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Preparation method of a low-cost high-activity iron catalyst

A high-activity, low-cost technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Effects of stability, enhanced activity, good thermal processability

Active Publication Date: 2018-12-18
TANGSHAN ZHENGFENG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the existing processing technology is generally high. At the same time, the iron catalyst is easily "poisoned" during its processing, that is, it is polluted by gases such as oxygen, carbon dioxide, or solids such as phosphorus and sulfur. Therefore, it is necessary to develop a low-cost, high-activity catalyst. It is necessary to have a preparation method that is not easy to pollute

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of a kind of low-cost highly active iron catalyst that the present invention proposes comprises the following steps:

[0022] S1. Preheating: After vacuuming the first processing equipment, nitrogen gas is introduced, and then the temperature of the first processing equipment is raised to 750°C;

[0023] S2. Mixing and sintering: Mix 80 parts of iron powder, 10 parts of aluminum powder, and 2 parts of magnesium powder in parts by weight, put them into the first processing equipment after preheating, and raise the first processing equipment and its The temperature of the content reaches 1300°C, and then keeps warm for 35 minutes to obtain material A; wherein, the particle size of iron powder is 0.06mm, the particle size of aluminum powder is 0.06mm, and the particle size of magnesium powder is 0.006mm; the bulk density of iron powder is 2.7g / cm 3 , the bulk density of aluminum powder is 1.1 g / cm 3 , the bulk density of magnesium powder is 2g / c...

Embodiment 2

[0028] The preparation method of a kind of low-cost highly active iron catalyst that the present invention proposes comprises the following steps:

[0029] S1. Preheating: After vacuuming the first processing equipment, nitrogen gas is introduced, and then the temperature of the first processing equipment is raised to 650°C;

[0030] S2. Mixing and sintering: Mix 85 parts of iron powder, 7 parts of aluminum powder, and 5 parts of magnesium powder in parts by weight, put them into the first processing equipment after preheating, and raise the first processing equipment and its The temperature of the content reaches 1400°C, and then keeps warm for 28 minutes to obtain material A; wherein, the particle size of iron powder is 0.08mm, the particle size of aluminum powder is 0.04mm, and the particle size of magnesium powder is 0.01mm; the bulk density of iron powder is 2.55g / cm 3 , the bulk density of aluminum powder is 1.5 g / cm 3 , the bulk density of magnesium powder is 1.6g / ...

Embodiment 3

[0035] The preparation method of a kind of low-cost highly active iron catalyst that the present invention proposes comprises the following steps:

[0036] S1. Preheating: After vacuuming the first processing equipment, nitrogen gas is introduced, and then the temperature of the first processing equipment is raised to 720°C;

[0037] S2. Mixing and sintering: Mix 82 parts of iron powder, 11 parts of aluminum powder, and 6 parts of magnesium powder in parts by weight, put them into the first processing equipment after preheating, and raise the first processing equipment and its The temperature of the content reaches 1350°C, and then keeps warm for 32 minutes to obtain material A; wherein, the particle size of iron powder is 0.065mm, the particle size of aluminum powder is 0.05mm, and the particle size of magnesium powder is 0.008mm; the bulk density of iron powder is 2.66g / cm 3 , the bulk density of aluminum powder is 1.2g / cm 3 , the bulk density of magnesium powder is 1.9...

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Abstract

The invention discloses a preparation method for a low-cost highly active iron catalyst. The method comprises the following steps that nitrogen gas is introduced into a first processing device after vacuumization, and then the first processing device is preheated; then an iron powder, an aluminum powder and a magnesium powder are mixed evenly and then put into the first processing device after preheating, the temperatures of the first processing device and a content thereof are increased, and heat preservation is carried out to obtain a material A; the material A is cooled and drawn and molded to obtain a material B; the material B is used as electric arc power consumption self damage positive and negative electrodes and is put into a second processing device, and the material B is subjected to supersonic speed arc jet gas atomization to obtain a material C; and the material C is put into a third processing device, then oxygen gas is introduced into the third processing device containing the material C, the temperatures of the third processing device and the content thereof are increased, and heat preservation is carried out to obtain the low-cost highly active iron catalyst. The preparation method has low cost, the prepared iron catalyst has fewer impurities and high activity, and the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a low-cost high-activity iron catalyst. Background technique [0002] At present, multi-component catalysts with iron as the main body are commonly used in the ammonia synthesis industry, also known as iron catalysts. The cost of the existing processing technology is generally high. At the same time, the iron catalyst is easily "poisoned" during its processing, that is, it is polluted by gases such as oxygen, carbon dioxide, or solids such as phosphorus and sulfur. Therefore, it is necessary to develop a low-cost, high-activity catalyst. And the preparation method that is not easy to pollute is very necessary. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a low-cost high-activity iron catalyst, which is low in cost, has less impurities and high activity, and is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745
CPCB01J23/78B01J35/08B01J37/08B01J37/14B01J37/342
Inventor 李芹
Owner TANGSHAN ZHENGFENG IRON & STEEL CO LTD
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