Copper and iron-loaded modified activated carbon absorbent and method for preparing same

An activated carbon adsorption and activated carbon technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as complex processes, secondary pollution, and high energy consumption, achieve mild reaction conditions, improve purification efficiency, and reduce purification cost effect

Inactive Publication Date: 2010-04-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above methods all have defects such as low dephosphorization accuracy, high energy consumption, low efficiency, complicated process, large investment or secondary pollution, especially for pH 3 The adsorption capacity is not high
The yellow phosphorus tail gas purified by the above method fails to meet the requirements of the one-carbon chemical industry. The yellow phosphorus tail gas is a gas source rich in carbon monoxide, but the comprehensive utilization of the yellow phosphorus tail gas is limited due to its phosphine impurities.

Method used

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  • Copper and iron-loaded modified activated carbon absorbent and method for preparing same
  • Copper and iron-loaded modified activated carbon absorbent and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Wash conventional commercially available coal-based activated carbon with distilled water, then conventionally ultrasonically clean it for 40 minutes, place it in an oven to dry, and dry it at 100°C for 18 hours to take it out for use; weigh 1.2202g Cu(NO 3 ) 2 ·3H 2 O and 0.4102g Fe(NO 3 ) 3 9H 2 Mix O to make Cu / Fe=5:1 (molar ratio), dissolve it with 24ml distilled water to obtain the impregnation solution; weigh 25g of the above-mentioned dried activated carbon and immerse it in the impregnation solution, fully stir, and use conventional Ultrasonic impregnation for 60 minutes, then placed in an oven, dried at 100°C for 12 hours; finally placed in a muffle furnace, baked at 350°C for 6 hours, taken out, placed in a drying dish and cooled to room temperature, you can get The activated carbon adsorbent that adsorbs low-concentration phosphine gas, the purification effect is shown in Table 1.

[0024] Table 1 purification effect:

[0025] time / minute

Embodiment 2

[0027] The coal-based activated carbon was washed with distilled water, cleaned by conventional ultrasonic cleaning, placed in an oven to dry, dried at 80°C for 24 hours, and taken out for use; weighed 1.2202g Cu(NO 3 ) 2 ·3H 2 O and 0.2051gFe(NO 3 ) 3 9H 2 O mixed to make Cu / Fe=10:1 (molar ratio), dissolved in 24ml of distilled water to obtain the impregnating solution; weigh 25g of the above-mentioned dried activated carbon and immerse in the impregnating solution, fully stir, and use conventional Ultrasonic impregnation for 50 minutes, dried in an oven at 80°C for 24 hours; finally placed in a muffle furnace and baked at 200°C for 8 hours, taken out and placed in a drying dish to cool to room temperature to obtain low-concentration phosphating The activated carbon adsorbent for hydrogen gas, the purification effect is shown in Table 2.

[0028] Table 2 purification effect:

[0029] time / min

Embodiment 3

[0031] The coal-based activated carbon was washed with distilled water, then cleaned by conventional ultrasonic waves, then dried in an oven, dried at 120°C for 12 hours, and taken out for use; weighed 1.2202g Cu(NO 3 ) 2 ·3H 2 O and 0.1025gFe(NO 3 ) 3 9H 2O mixed to make Cu / Fe=20:1 (molar ratio), dissolved in 24ml of distilled water to obtain the impregnating solution; weigh 25g of the above-mentioned dried activated carbon and immerse in the impregnating solution, fully stir, and use conventional Ultrasonic impregnation for 40 minutes, dried in an oven at 90°C for 18 hours; finally placed in a muffle furnace and roasted at 600°C for 2 hours, taken out and placed in a drying dish to cool to room temperature to obtain low-concentration phosphating The activated carbon adsorbent for hydrogen gas, the purification effect is shown in Table 3.

[0032] Table 3 purification effect:

[0033] time / min

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Abstract

The invention discloses a copper and iron-loaded modified active carbon absorbent and a method for preparing the same. The copper and iron-loaded modified active carbon absorbent is characterized by: taking conventional coal-based activated carbon as a carrier of the absorbent, wherein the carrier is loaded with an oxide of copper and iron two transition metals as an active component; and the mol ratio of the copper to the iron in the oxide is 5-20:1. The method for preparing the copper and iron-loaded modified active carbon absorbent is simple, strong in operability, moderate in reaction condition and easy in implementation, improves purification efficiency, reduces the purification cost, and can realize the dephosphorization of waste gas and the reclamation of wastes after saturated absorption. The invention also discloses the method for preparing the copper and iron-loaded modified active carbon absorbent.

Description

technical field [0001] The invention relates to a preparation technology of an adsorbent, in particular to a preparation method of a loaded adsorbent for purifying low-concentration phosphine, and belongs to the technical field of adsorption and separation. Background technique [0002] Phosphine (PH 3 ) is a colorless, foul-smelling gas at room temperature. It is highly toxic and is also called phosphine or phosphine. pH 3 It is mainly produced in the process of yellow phosphorus production, magnesium powder preparation, acetylene production, sodium hypophosphite production, and grain storage fumigation and insecticide. Its emissions will cause air pollution, endanger the environment and human health, and affect the pH 3 The reuse of yellow phosphorus tail gas and calcium carbide furnace tail gas. The purification of yellow phosphorus tail gas to produce high-purity CO technology is the main topic of my country's "Tenth Five-Year Plan" chemical environmental protection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32B01D53/02C01B25/06
Inventor 易红宏杨丽萍唐晓龙余琼粉
Owner KUNMING UNIV OF SCI & TECH
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