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Method for preparing molecular sieve absorbent with high adsorption capacity

A molecular sieve and adsorbent technology, applied in the field of preparation of high adsorption capacity molecular sieve adsorbents, can solve the problems of many processes, difficult carbon monoxide desorption, good powder exchange effect, etc. simple effect

Inactive Publication Date: 2007-05-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 86102838 discloses a copper-modified molecular sieve, which can be complexed and adsorbed with monovalent copper or divalent copper by using carbon monoxide, so it has high adsorption capacity and high selective adsorption performance for carbon monoxide, but its adsorbed carbon monoxide desorbs more difficult
CA2125314 discloses a kind of method that improves ion exchange capacity, is to regulate the sodium carbonate solution of pH=8-9 with sodium hydroxide to process sample 3-4 times and then exchange with calcium chloride solution, can improve calcium exchange capacity, but its There are many processes and it has a good effect on powder exchange

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Mix 80g of 4A powder, 20g of kaolin, and 0.05mol calcium chloride evenly, extrude into strips, dry, roast in a muffle furnace at 650°C for 2 hours, and then crystallize in 300ml, 1.5mol / L sodium hydroxide solution at 90°C 6h, washed with water to pH = 8, then exchanged the sample in 300ml, 0.97mol / L calcium chloride at 90°C for 2h, exchanged twice, washed the sample with water at 90°C for one night, then dried it in Activation in a muffle furnace at 450°C for 2h. Measured by gravimetric method: at 1atm and 25°C, the adsorption capacity of carbon monoxide is 33.00ml / g, and the adsorption capacity of nitrogen is 10.06ml / g; at 0.25atm and 25°C, n-hexane is 16.16%.

Embodiment approach 2

[0019] The calcium chloride that adds is 0.035mol, all the other steps are identical with example 1, record with gravimetric method: like this at 1atm, under 25 ℃, the adsorption capacity of carbon monoxide is 30.73ml / g, and the adsorption capacity of nitrogen is 9.14ml / g ; At 0.25atm, at 25°C, the adsorption capacity of n-hexane is 13.30%.

Embodiment approach 3

[0021] The calcium chloride that adds is 0.044mol, all the other steps are identical with example 1, record with gravimetric method: like this at 1atm, at 25 ℃, the adsorption capacity of carbon monoxide is 31.30ml / g, and the adsorption capacity of nitrogen is 9.73ml / g ; At 0.25atm, at 25°C, the adsorption capacity of n-hexane is 14.70%.

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Abstract

The invention relates to a method for preparing the absorber of molecule screen, wherein it is characterized in that: it improves the calcium content to prepare the absorber with high adsorption on nitrogen, carbon oxide, oxygen, water, etc. And said method mixes 4A molecule screen with calcium compound, uses caoline as adhesive, compresses, bakes, treats with alkali, exchanges with calcii chloridum solution and activates. The nitrogen adsorption of product can reach 11.5ml / g, and the carbon oxide adsorption can reach 34ml / g, and the skellysolve B adsorption can reach 16%.

Description

1. Technical field [0001] The preparation method of the molecular sieve adsorbent with high adsorption capacity of the present invention belongs to the technical field of preparation of zeolite molecular sieves and improvement of the existing binderless molecular sieve 5A process, and is a preparation method of the 5A molecular sieve adsorbent with high ion exchange and high adsorption capacity. 2. Technical Background [0002] Carbon monoxide, nitrogen, methane, etc. are all important industrial raw material gases. With the development of industry, the demand for these raw material gases is also increasing. Therefore, it is of great industrial significance to separate and purify these gases. [0003] Pressure swing adsorption (PSA) technology is a new gas separation technology that has emerged in the industry in recent years. It uses the difference in the adsorption characteristics of gas components on solid materials and the characteristics that the adsorption amount chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30
Inventor 马静红白蓉赵忠林于峰崔杏雨李瑞丰
Owner TAIYUAN UNIV OF TECH
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