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Heteroatom zeolite adsorbent and preparation method thereof

A technology of heteroatom molecular sieve and adsorbent, which is applied in the field of heteroatom molecular sieve adsorbent and its preparation, can solve the problems of low adsorption capacity, poor regeneration stability, and low purification precision of adsorbent, and achieve good reproducibility and good technical effect Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is that there are problems such as low purification precision, low adsorption capacity and poor regeneration stability of the adsorbent in the prior art.

Method used

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  • Heteroatom zeolite adsorbent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Contains Ce 3+ and Ni 2+ The preparation process of two ion-exchanged NaY molecular sieves and a shaped adsorbent with activated alumina as a binder is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 10. Subsequently, Ce(NO 3 ) 3 Solution 100 ml, the above 10 g NaY molecular sieve powder was added to 100 ml Ce(NO 3 ) 3 solution, that is, according to the solid-liquid ratio of 1:10, at 90 o C, fully stirred, exchanged for 6 hours. Filter and rinse with deionized water. Repeat the above operation three times. The same method was used to prepare Ni(NO 3 ) 2 solution, according to the solid-liquid ratio of 1:3, at 50 o C, fully stirred, exchanged for 12 hours, carried out ion exchange three times according to this condition, and obtained the exchanged molecular sieve precursor after drying. Then, weigh 10g of alumina powder, take alumina as a binder, and let it dry naturally, in the air at 550 o C, bak...

Embodiment 2

[0034] Contains Ce 3+ 、Ni 2+ and Cu 2+ The preparation process of three ion-exchanged NaY molecular sieves and a shaped adsorbent with activated alumina as a binder is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 10. Subsequently, Ce(NO 3 ) 3 Solution 200 ml, the above-mentioned NaY molecular sieve powder was added to 200 ml Ce(NO 3 ) 3 solution, that is, according to the solid-liquid ratio of 1:20, at 20 o C, fully stirred, exchanged for 80 hours. Filter and rinse with deionized water. Repeat the above operation twice. The same method was used to prepare Ni(NO 3 ) 2 Solution, according to the solid-liquid ratio of 1:3, at 150 o C, fully stirred, exchanged for 2 hours, and carried out four times of ion exchange according to the above conditions. Thereafter, Cu(NO 3 ) 2 Solution, according to the solid-liquid ratio of 1:5, at 150 o C, fully stirred, and exchanged for 2 hours, after that, an ion-excha...

Embodiment 3

[0037] Contains Ce 3+ 、Ni 2+ 、Cu 2+ and Zn 2+ Preparation of four ion-exchanged NaY molecular sieves and shaped adsorbents bound by activated alumina. The preparation of the adsorbent was carried out in the same manner as in Example 2. Only in the exchange process, Ce(NO 3 ) 3 Solution 30 ml, that is, change the solid-liquid ratio to 1:3, at 120 o C, with vigorous stirring, exchanged for 4 hours, and performed three exchanges. Carry out Ni in turn according to the same conditions 2+ 、Cu 2+ exchange. After Ni(NO 3 ) 2 , Cu(NO 3 ) 2 After exchange, under the same conditions, with 0.6 mol / L Zn(NO 3 ) 2 The solution was exchanged for 5 hours at a solid-to-liquid ratio of 1:5, and the exchanged molecular sieve precursor was obtained after drying. Then, weigh 10g of alumina powder, take alumina as a binder, and let it dry naturally, in the air at 550 o C, baked for 2 hours. Grind and sieve to take 10 to 20 mesh, in 300 o C drying until the quality is no longer r...

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Abstract

The invention relates to a heteroatom zeolite adsorbent and a preparation method thereof and mainly aims at solving the problems that purifying accuracy of an adsorbent is low, adsorption capacity is low and regeneration stability is poor in existing olefin adsorption purification. The preparation method comprises the following steps: introducing at least two metal cations by adopting an ion exchange or impregnation method for modifying zeolite, and moulding by virtue of a binding agent, so as to obtain a solid adsorbent. By adopting the technical scheme, the problems are relatively well solved, and the heteroatom zeolite adsorbent provided by the invention can be applied to adsorption purification industrial production and can be used for removing sulphur compounds in various olefin raw materials.

Description

technical field [0001] The invention relates to a double metal ion modified heteroatom molecular sieve adsorbent and a preparation method thereof. Background technique [0002] As an important basic organic chemical raw material, propylene is widely used and its demand is expanding day by day. Olefin disproportionation technology is one of the effective methods to increase propylene production. C 4 As one of the raw materials for olefin disproportionation, olefins have complex compositions, different sources, and different components. C 4 It often contains oxygen-containing compounds such as water, alcohol, ether and other non-hydrocarbon compounds containing sulfur and nitrogen in varying amounts. Among the many impurities, sulfur-containing compounds are highly toxic to the catalyst, and a small amount of sulfur-containing impurities will poison and deactivate the catalyst in downstream processing and production. Moreover, the existence of sulfide not only affects the...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30
CPCB01J20/186B01J20/3214B01J2220/42B01J2229/34B01J2229/62
Inventor 肖永厚王仰东洪涛刘苏
Owner CHINA PETROLEUM & CHEM CORP
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