Supported cuprous oxide adsorbent as well as preparation method, application and regeneration method thereof

A cuprous oxide and adsorbent technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problems of low copper reduction rate, difficulty in control, and high reduction temperature, and achieve low reduction temperature, easy control, The effect of high content

Active Publication Date: 2013-04-03
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in the current prior art, the cuprous oxide on the general adsorbent is obtained through two ways: (1) heat treatment of the cupric oxide on the carrier at high temperature (>700°C) under an inert atmosphere, which has the disadvantages of high reduction temperature and copper The disadvantage of low reduction rate; (2) the copper oxide on the carrier is placed in a reducing atmosphere (H 2 or CO) heat treatment, this method has the disadvantages that it is difficult to control and it is easy to reduce copper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of adsorbent: Weigh 0.7986g of copper acetate and 1g of carrier MCM-48, grind them for 30min, heat treat them in an air atmosphere at 400°C for 5h, and obtain a sample containing copper oxide after cooling. Take 0.3g of copper oxide-loaded sample and put it in an open container and isolate it with 5mL of formic acid, place it in a closed reaction kettle, put it in an oven at 150°C for 5h, and get the adsorbent loaded with cuprous oxide after cooling.

[0028] Adsorption application experiment: The gas adsorption performance of the adsorbent was measured by gravimetric method (this method is used in the following examples). Take 30 mg of the above adsorbent and place it in a high-precision gravimetric adsorption instrument Hiden IGA-100, fill it with ethylene and ethane at a rate of 10 mbar / min, and adsorb at 25 °C for 50 min at each pressure point. Under normal pressure, the adsorption capacity of the adsorbent to ethylene is 1.034mmol / g, the adsorption capa...

Embodiment 2

[0030] Preparation of adsorbent: Weigh 0.6242g of copper sulfate and 0.5g of carrier MCM-41, grind them for 30min, heat-treat in air atmosphere at 500°C for 6h, and obtain a sample containing copper oxide after cooling. Take 0.4g of copper oxide-loaded sample and put it in an open container and separate it with 4mL of N,N'-dimethylformamide, place it in a closed reaction kettle, put it in an oven at 180°C for 4 hours, and get it after cooling Adsorbent loaded with cuprous oxide.

[0031] Adsorption application experiment: Take 30 mg of the above-mentioned adsorbent and place it in a high-precision gravimetric adsorption instrument Hiden IGA-100, fill it with ethylene and ethane at a rate of 10 mbar / min, and adsorb at 25°C for 50 min at each pressure point. Under normal pressure, the adsorption capacity of the adsorbent to ethylene is 1.023mmol / g, the adsorption capacity to ethane is 0.356mmol / g, and the separation selectivity is 4.97.

Embodiment 3

[0033] Preparation of adsorbent: Weigh 0.9664g of copper nitrate and 1g of carrier SBA-15, grind them for 30min, heat treat them in an air atmosphere at 500°C for 5h, and obtain a sample containing copper oxide after cooling. Take 0.4g of copper oxide-loaded sample and put it in an open container and separate it with 0.4mL of formaldehyde, place it in a closed reaction kettle, put it in an oven at 140°C for 4 hours, and get the adsorbent loaded with cuprous oxide after cooling.

[0034] Adsorption application experiment: Take 30 mg of the above-mentioned adsorbent and place it in a high-precision gravimetric adsorption instrument Hiden IGA-100, fill it with ethylene and ethane at a rate of 10 mbar / min, and adsorb at 25°C for 50 min at each pressure point. Under normal pressure, the adsorption capacity of the adsorbent to ethylene is 1.074mmol / g, the adsorption capacity to ethane is 0.32mmol / g, and the separation selectivity is 8.76.

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Abstract

The invention discloses a supported cuprous oxide adsorbent for separating olefin and alkane. The supported cuprous oxide adsorbent is prepared mainly through an oxidation-reduction reaction between copper oxide on a carrier and reducing agent steam at a low temperature and effectively used for separating olefin and alkane. The supported cuprous oxide adsorbent disclosed by the invention is an adsorbent prepared by using a steam induced reduction method and adopts cuprous oxide as the active component.

Description

technical field [0001] The invention relates to an adsorbent, a preparation method, an application and a regeneration method, more specifically to a supported cuprous oxide adsorbent, a preparation method, an application and a regeneration method, and belongs to the field of chemical separation. Background technique [0002] Olefins and alkanes are important raw materials in chemical production, but at present, the separation of alkenes and alkanes usually adopts low-temperature rectification method with high energy density and large equipment investment. Due to its advantages of high efficiency, energy saving and low cost, the adsorption separation method is considered to be a more suitable method among many separation methods at present, and the core of the adsorption method to separate alkenes and alkanes is to develop adsorbents with large adsorption capacity and high adsorption selectivity. [0003] Due to the advantages of low price and high adsorption selectivity, the...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/08B01J20/20B01J20/30B01J20/34B01D53/04
Inventor 刘晓勤孙林兵蒋文娟刘定华
Owner NANJING UNIV OF TECH
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