Ni-containing molecular sieve adsorbent and preparation method thereof

A technology of molecular sieves and adsorbents, applied in the field of Ni-containing molecular sieve adsorbents and their preparation, can solve the problems of low adsorption capacity, poor regeneration stability, and low purification precision of adsorbents, and achieve good reproducibility and good technical effects

Active Publication Date: 2017-09-15
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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  • Ni-containing molecular sieve adsorbent and preparation method thereof
  • Ni-containing molecular sieve adsorbent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Contains NiO and P 2 o 5 The preparation process of the ion-exchange modified HY molecular sieve adsorbent is as follows. First, accurately weigh

[0026] 10 g HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Ni(NO 3 ) 2 Solution 100 ml. Thereafter, 86% by weight of H was continuously added dropwise 3 PO 4 solution (density 1.6 g / ml), make H 3 PO 4 The molar concentration is 0.1mol / L. Add the accurately weighed HY molecular sieve raw powder to the above 100 ml Ni (NO 3 ) 2 and PO 4 3- In the solution, that is, according to the solid-liquid ratio of 1:10, at 80 o C, fully stirred, exchanged for 6h. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sieve precursor was obtained after drying. Form into pieces, dry naturally, 550 in the air o C, baked for 2 hours. Grind and sieve to get the adsorbent particles with a diameter of 830-1700 μm, at 300 o C drying unt...

Embodiment 2

[0029] Contains NiO and P 2 o 5 The preparation process of the ion-exchange modified HY molecular sieve adsorbent is as follows. First, accurately weigh 10 g of HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Ni(NO 3 ) 2 Solution 100 ml. Thereafter, 86% by weight of H was continuously added dropwise 3 PO 4 solution (density 1.6 g / ml), make H 3 PO 4 The molar concentration is 0.1mol / L. Add accurately weighed 10g HY molecular sieve raw powder to the above 100 ml Ni (NO 3 ) 2 and PO 4 3- In the solution, that is, according to the solid-liquid ratio of 1:10, at 80 o C, fully stirred, exchanged for 6h. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sieve precursor was obtained after drying. Form into pieces, dry naturally, 550 in the air o C, baked for 2 hours. Grind and sieve to get the adsorbent particles with a diameter of 830-1700 μm, at 300 o C drying until the ...

Embodiment 3

[0032] Containing 3 parts by weight of NiO 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 10 g of HY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Ni(NO 3 ) 2 Solution 100 ml. Thereafter, 86% by weight of H was continuously added dropwise 3 PO 4 solution (density 1.6 g / ml), make H 3 PO 4 The molar concentration is 0.1 mol / L. Add accurately weighed 10g HY molecular sieve raw powder to the above 100 ml Ni (NO 3 ) 2 and containing PO 4 3- In the solution, that is, according to the solid-liquid ratio of 1:10, at 80 o C, fully stirred, exchanged for 6h. Filter and rinse with deionized water. Repeat the above exchange operation three times. The exchanged molecular sieve precursor was obtained after drying. Form into pieces, dry naturally, 550 in the air o C, baked for 2 hours. Grind and siev...

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Abstract

The invention relates to a Ni-containing molecular sieve adsorbent and a preparation method thereof, and mainly aims to solve the problems of low purification accuracy, low adsorption capacity, poor regeneration stability and the like of an absorbent in the existing olefin adsorption purification technology. The problems can be well solved by adopting a technical scheme of a solid adsorbent and a preparation method thereof which comprises the steps of introducing metal cation Ni<2+> by means of ion exchange to modify a molecular sieve, rolling, tabletting or extruding for molding. The Ni-containing molecular sieve adsorbent can be used in adsorption purification industrial production for removing sulfur-containing compounds of various olefin raw materials.

Description

technical field [0001] The invention relates to a Ni-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): B01J20/18B01J20/30C07C7/12C07C11/08
CPCB01J20/18B01J20/3085B01J2220/42B01J2220/4806C07C7/12C07C11/08
Inventor 肖永厚洪涛王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
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