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Cu-containing molecular sieve adsorbent and preparation method thereof

A molecular sieve and adsorbent technology, applied in the field of Cu-containing molecular sieve adsorbent and its preparation, can solve the problems of low adsorption capacity, poor regeneration stability, low purification accuracy of the adsorbent, etc., and achieve the effect of good regeneration and good technical effect.

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Cu-containing molecular sieve adsorbent and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of the ion-exchange modified NaY molecular sieve adsorbent containing CuO and P is as follows. First, accurately weigh

[0027] 10 g NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Cu(NO 3 ) 2 solution 30 ml, continuously drop NH in the above solution 3 h 2 O, added NH 3 h 2 The amount of O species is Cu(NO 3 ) 2 Add according to the amount of 4:1, that is, 0.5mol of Cu(NO 3 ) 2 Need to add 2mol of NH 3 h 2 O, forming Cu(NH 3 ) 4 (NO 3 ) 2 solution. Thereafter, 86% by weight H was added dropwise continuously 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 NaY molecular sieve powder to the above 30 ml Cu(NH 3 ) 4 (NO 3 ) 2 And in the solution containing P, that is, according to the condition that the solid-liquid ratio is 1:3, at 20 o C, fully stirred, exchanged for 60h. Filter and rinse with deionized water. Repeat the ab...

Embodiment 2

[0030] The preparation process of the ion-exchange modified NaY molecular sieve adsorbent containing CuO and P is as follows. First, accurately weigh 11 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Cu(NO 3 ) 2 solution 110 ml, continuously drop NH in the above solution 3 h 2 O, added NH 3 h 2 The amount of O species is approximately Cu(NO 3 ) 2 Add according to the amount of 4:1, that is, 0.2mol of Cu(NO 3 ) 2 Need to add 0.8mol of NH 3 h 2 O, forming Cu(NH 3 ) 4 (NO 3 ) 2 solution. Thereafter, 86% by weight H was added dropwise continuously 3 PO 4 solution (density 1.6 g / ml), make H 3 PO 4 The molar concentration is 0.2mol / L. Add accurately weighed 11g NaY molecular sieve powder to the above 110 ml Cu(NH 3 ) 4 (NO 3 ) 2 And in the solution containing P, that is, according to the solid-liquid ratio of 1:10, at 70 o C, fully stirred, exchanged for 12h. Filter and rinse with deionized water. The exchanged molecu...

Embodiment 3

[0033] Cu containing 2 parts by weight 2 The preparation process of the ion-exchange modified NaY molecular sieve adsorbent with O and 0.1 parts by weight of P and 80 parts by weight of NaY is as follows. First, accurately weigh 12 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, Cu(NO 3 ) 2 solution 240 ml, continuously drop NH in the above solution 3 h 2 O, added NH 3 h 2 The amount of O species is approximately Cu(NO 3 ) 2 Add according to the amount of 4:1, that is, 0.1mol of Cu(NO 3 ) 2 Need to add 0.4mol of NH 3 h 2 O, forming Cu(NH 3 ) 4 (NO 3 ) 2 solution. Thereafter, 86% by weight H was added dropwise continuously 3 PO 4 solution (density 1.6 g / ml), make H 3 PO 4 The molar concentration is 0.05 mol / L. Add accurately weighed 8g NaY molecular sieve powder to the above 240 ml Cu(NH 3 ) 4 (NO 3 ) 2 And in the solution containing P, that is, according to the solid-liquid ratio of 1:20, at 90 o C, fully stirred,...

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Abstract

The invention relates to a Cu-containing molecular sieve adsorbent and a preparation method thereof, which are mainly used for solving the problems of low purification degree, low adsorption capacity, poor regeneration stability and the like of an adsorbent in the existing olefin adsorption purification technology. The problems are well solved through the adoption of the technical scheme that the preparation method comprises the following steps: Cu metal cations are introduced by ion exchange to modify a molecular sieve, and the modified molecular sieve is rolled, tableted and extruded into a solid adsorbent. The Cu-containing molecular sieve adsorbent can be used in industrial adsorption purification production of sulfocompound desorption of various olefin raw materials.

Description

technical field [0001] The invention relates to a Cu-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
CPCB01J20/183B01J20/3007B01J2220/44B01J2229/18B01J2229/34C07C7/13C07C11/08
Inventor 肖永厚王仰东洪涛刘苏
Owner CHINA PETROLEUM & CHEM CORP
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