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Fe-containing molecular sieve adsorbent and preparation method thereof

A technology of molecular sieve and adsorbent, which is applied in the field of Fe-containing 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 regenerative effect

Active Publication Date: 2018-07-17
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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  • Fe-containing molecular sieve adsorbent and preparation method thereof
  • Fe-containing molecular sieve adsorbent and preparation method thereof
  • Fe-containing molecular sieve adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Contains Fe 2 o 3 , ZrO 2 and P 2 o 5 The preparation process of the ion-exchange modified HY molecular sieve adsorbent is as follows. First, accurately weigh 10g of HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Fe(NO 3 ) 3 Solution 100ml. In the above solution, add 3.94g Zr(NO 3 ) 4 ·3H 2 O, so that the Zr(NO 3 ) 4 The content is about 0.10mol / L. Thereafter, the continuous dropwise addition of H 3 PO 4 solution to make H 3 PO 4 The molar concentration is 0.1mol / L. Add the accurately weighed HY molecular sieve raw powder to the above 100ml Fe(NO 3 ) 3 , Zr(NO 3 ) 4 and PO 4 3- solution, that is, according to the solid-to-liquid ratio of 1:10, at 80 ° C, fully stirred, exchanged for 6 hours. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sieve precursor was obtained after drying. Make into pieces, dry naturally, and bake at 550°C for 2 hours in th...

Embodiment 2

[0030] Contains Fe 2 o 3 , ZrO 2 and P 2 o 5 The preparation process of the ion-exchange modified HY molecular sieve adsorbent is as follows. First, accurately weigh 10g of HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Fe(NO 3 ) 3 Solution 100ml. In the above solution, add 3.94g Zr(NO 3 ) 4 ·3H 2 O, so that the Zr(NO 3 ) 4 The content is about 0.1mol / L. Thereafter, the continuous dropwise addition of H 3 PO 4 solution to make H 3 PO 4 The molar concentration is 0.1mol / L. Add accurately weighed 10g HY molecular sieve raw powder to the above 100ml Fe(NO 3 ) 3 , Zr(NO 3 ) 4 and PO 4 3- solution, that is, according to the solid-to-liquid ratio of 1:10, at 80 ° C, fully stirred, exchanged for 6 hours. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sieve precursor was obtained after drying. Make into pieces, dry naturally, and bake at 550°C for 2 hours in the...

Embodiment 3

[0033] Contains 3 parts by weight of Fe 2 o 3 , ZrO with 2 parts by weight 2 and 2 parts by weight of P 2 o 5 , The preparation process of the ion-exchange modified HY molecular sieve adsorbent containing 80 parts by weight of HY is as follows. First, accurately weigh 10g of HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Fe(NO 3 ) 3 Solution 100ml. In the above solution, add 3.94g Zr(NO 3 ) 4 ·3H 2 O, so that the Zr(NO 3 ) 4 The content is about 0.1mol / L. Thereafter, the continuous dropwise addition of H 3 PO 4 solution to make H 3 PO 4 The molar concentration is 0.1mol / L. Add accurately weighed 10g HY molecular sieve powder to the above 100ml Fe(NO 3 ) 3 , Zr(NO 3 ) 4 and containing PO 4 3- solution, that is, according to the solid-to-liquid ratio of 1:10, at 80 ° C, fully stirred, exchanged for 6 hours. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sie...

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Abstract

The invention relates to a Fe-containing molecular sieve adsorbent and a preparing method thereof, and mainly overcomes problems of adsorbents in olefin adsorption purification techniques at present, such as low purification precision, low adsorption capacity and poor regeneration stability. According to a technical scheme adopted by the adsorbent and the preparing method, a metal cation that is Fe<3+> is introduced by ion exchange to modify a molecular sieve, and a solid adsorbent is prepared by rolling into balls, tabletting or extrusion moulding. The problems are overcome by adoption of the technical scheme. The Fe-containing molecular sieve adsorbent can be used for adsorption and purification industrial production for removing sulfur compounds from various olefin raw materials.

Description

technical field [0001] The invention relates to an Fe-containing 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 quality of downstream...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C07C11/08C07C7/13
Inventor 肖永厚洪涛王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
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