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Preparation method of adsorbent for CO pressure swing adsorption

A pressure swing adsorption and adsorbent technology, which is applied in the chemical industry and can solve the problems of low mechanical strength and low adsorption efficiency.

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a kind of highly selective adsorbent and preparation method thereof for separating carbon monoxide from a gas mixture containing carbon monoxide, which solves the problems of low mechanical strength of conventional adsorbents and CO adsorption efficiency. not high problem

Method used

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  • Preparation method of adsorbent for CO pressure swing adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 1gX molecular sieve, add 17g of sodium aluminate solution with mass concentration of 40%, and 20g of tetrapropylammonium bromide solution with mass concentration of 6%, then crystallize at 120°C for 5h, cool, wash and dry. The first modified carrier.

[0038] Afterwards, the first modified carrier is placed in water so that the mass ratio of the first modified carrier to water is 3:7, and then ethylenediamine is added so that the mass ratio of water to ethylenediamine is 5:1. Then, it was treated in gas-solid phase at 160° C. for 15 hours, washed with water and dried to obtain a second modified carrier.

[0039] Weigh 10 g of the second modified carrier, mix it with 3 g of cuprous chloride and an appropriate amount of water, mix it evenly, extrude it, leave it to stand and then dry it to obtain an adsorbent precursor.

[0040] The obtained adsorbent precursor was placed in a muffle furnace, calcined at 200°C for 5 hours, then soaked in a 5% hydrochloric acid solu...

Embodiment 2

[0043] Weigh 1g SAPO-34 molecular sieve, add 25g mass concentration of 40% aluminum sulfate solution, 15g mass concentration of 5% n-propylamine solution and 12g mass concentration of 5% phosphoric acid solution, then crystallize at 110 ° C for 4h, after cooling, washing with water and drying to obtain the first modified carrier.

[0044]Afterwards, the first modified carrier was placed in water so that the mass ratio of the first modified carrier to water was 3:7, and then n-butylamine was added to make the mass ratio of water to ethylenediamine 6:1. Then, it was treated in gas-solid phase at 150° C. for 12 hours, washed with water and dried to obtain a second modified carrier.

[0045] Weigh 10 g of the second modified carrier, mix it with 3 g of cuprous chloride and an appropriate amount of water, mix it evenly, extrude it, leave it to stand and then dry it to obtain an adsorbent precursor.

[0046] The prepared adsorbent precursor was placed in a muffle furnace, calcined ...

Embodiment 3

[0049] Adsorbent C was prepared in the same manner as in Example 1, except that aluminum acetate was used instead of sodium aluminate in Example 1.

[0050] The mechanical strength of the adsorbent C and the carbon monoxide adsorption capacity at 18° C. and a carbon monoxide pressure of 760 mmHg were tested, and the results are shown in Table 1.

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Abstract

The invention provides a preparation method of an adsorbent, which comprises the following steps: a) mixing a carrier with a template agent, an optional aluminum source solution and an optional phosphoric acid solution, and crystallizing after mixing to obtain a first modified carrier; b) carrying out gas-solid phase treatment on the first modified carrier by adopting organic amine to prepare a second modified carrier; c) mixing the second modified carrier with a copper source and molding to prepare an adsorbent precursor; and d) carrying out roasting treatment on the adsorbent precursor to prepare the adsorbent. The problems that a conventional adsorbent is low in mechanical strength and low in CO adsorption efficiency are solved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing an adsorbent used for pressure swing adsorption of CO. Background technique [0002] In modern industry, N 2 、CH 4 And CO are important basic chemical raw materials. N 2 It has already been widely used in chemical industry, electronics, metallurgy, jewelry, machinery and other fields. The demand for nitrogen in modern industry is increasing at a rate of more than 10% every year; CH 4 In addition to being used as a synthetic raw material, it is more practical as an energy source at present, and CO is an important raw material for hydroxyl synthesis of organic chemical food, and can also produce a variety of postal chemicals, such as formic acid, oxalic acid, acetic acid, methyl formamide DMF, di Isocyanate TDL etc. [0003] Pressure Swing Adsorption (PSA) is a new gas separation technology that has emerged in the industry in recent decades. It...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/18B01D53/047
CPCB01J20/18B01D53/047B01D2253/108B01D2257/502Y02C20/40
Inventor 史静朱慧芬李斌
Owner CHINA PETROLEUM & CHEM CORP
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