Active molecular sieve absorbent and preparation method thereof

A technology of active molecules and adsorbents, applied in the field of active molecular sieve adsorbents, can solve the problems that the performance of adsorbents is difficult to meet the requirements of the industry, the lack of active molecular sieve adsorbents, etc.

Active Publication Date: 2009-03-11
上海恒业微晶材料科技股份有限公司
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  • Summary
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Problems solved by technology

However, with the development of industrial technology, the performance of these molecular sieve adsorbents has been difficult to meet the requirements of the industry. Therefore, the development of some...

Method used

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Examples

Experimental program
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preparation example Construction

[0048] The preparation method of adsorbent of the present invention, comprises the steps:

[0049] (a) Provide a mixture of 80-90% by weight of molecular sieve components and 10-20% by weight of binder, wherein the molar ratio of silicon to aluminum of the molecular sieve components is 1±0.1; the mixture is calcined and formed to obtain a molded body ;

[0050] (b) The molded body of the step (a) is subjected to lithium ion exchange in the presence of a lithium source, so that Li + The degree of exchange in the shaped body is not lower than 88% (preferably not lower than 97%) in terms of the molar percentage of the molecular sieve component, thereby obtaining a lithium ion exchanged shaped body; and

[0051] (c) drying and activating the lithium ion exchange molded body in the step (b) to obtain the adsorbent.

[0052] step (a)

[0053] The mixing of the molecular sieve component and the binder can adopt a common or traditional mixing method in the field, as long as it do...

Embodiment 1

[0082] Take 90Kg of low-silicon molecular sieve raw powder (silicon-aluminum ratio of 1:1), 10Kg of sheepskin, 100g of lignin additives, 100g of sodium carboxymethyl cellulose and a little water, extrude on an extruder, and heat at 100°C Dry overnight, then calcined at 520°C for 0.5h to shape. Take 15g of shaped molecular sieve, put it into a 16-column exchange column, at 99°C, at 1.05m 3 Ion exchange was carried out in 2.2M LiCl solution at a flow rate of / h for 24 hours, and then washed repeatedly with hot water (80-100°C) until no Cl- was detected, and a lithium (ion) exchanged molded body was obtained, and the exchange degree was measured to be 98.2%. .

[0083] The lithium-exchanged molded body obtained in Example 1 was dried and activated: as shown in Examples 5-17.

Embodiment 2

[0085] Take 80Kg of low-silicon molecular sieve raw powder (silicon-aluminum ratio is 1:1.1), 19.8Kg of sheepskin, 100g of lignin additives, 100g of sodium carboxymethyl cellulose and a little water, and extrude them on an extruder, at 120°C Dry overnight at 520°C and then calcined for 0.5h to shape. Take 15g of shaped molecular sieve, put it into a 16-column exchange column, at 99°C, at 1.25m 3 Ion exchange was performed in 0.5M LiCl solution at a flow rate of 24 hours, and then washed repeatedly with hot water (80-100°C) until no Cl was detected. - , to obtain a lithium-exchanged molded body, and the measured exchange degree is 88.2%.

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Abstract

The invention provides a technique for preparing and activating an adsorbent of an active molecular sieve; the adsorbent of the active molecular sieve comprises the following components by weight: 80 to 90 percent of molecular sieve components and 10 to 20 percent of a binding agent; wherein, the silica-alumina molar ratio of the molecular sieve components is 1 plus or minus 0.1 and the exchange degree of Li<+> in the absorbent is not less than 88 percent by mole percentage. The absorbing and separating effect of the molecular sieve in the invention can meet the industrial requirements.

Description

technical field [0001] The invention provides an active molecular sieve adsorbent and a preparation method thereof. Background technique [0002] With the development of industry, nitrogen and oxygen are playing an increasingly important role in the field of industrial production. The traditional method of obtaining oxygen-enriched air is cryogenic separation, which requires large investment and high energy consumption, and is suitable for large-scale fields. The pressure swing adsorption method was successfully developed in the late 1950s. Due to its unique advantages of flexibility, convenience, less investment, and low energy consumption, the pressure swing adsorption air separation and oxygen enrichment technology has been widely used in small and medium-scale oxygen enrichment applications in recent years. It has been used more and more, and is widely used in wastewater treatment, glass processing, steel industry, paper industry, aquaculture, medicine and home health c...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30
Inventor 姜义军郭建伟
Owner 上海恒业微晶材料科技股份有限公司
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