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Halogen-containing molecular sieve adsorbent and preparation method thereof

A molecular sieve and adsorbent technology, applied in the field of halogen-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 regeneration and good technical effects

Inactive Publication Date: 2015-11-25
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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  • Halogen-containing molecular sieve adsorbent and preparation method thereof
  • Halogen-containing molecular sieve adsorbent and preparation method thereof
  • Halogen-containing molecular sieve adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of NaY molecular sieve adsorbent modified with fluorine element is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, 100 ml of dilute nitric acid solution with a mass percent concentration of 15% was prepared for subsequent use. Accurately weigh 2.5gAl 2 o 3 , will weigh Al 2 o 3 Mix well with the above-mentioned NaY molecular sieve raw powder. Take 7ml of dilute nitric acid solution with a mass percent concentration of 15%, slowly and evenly add it dropwise to the above mixture, and then extrude it with an extruder. The molded samples are dried or oven-dried for later use.

[0027] Prepare NH with a molar concentration of 0.2mol / L 4 F solution 100ml. Take the above NH 4 Sprinkle 4ml of solution F evenly on the above-mentioned formed molecular sieve carrier, and stir thoroughly. Dry it naturally, and bake it for 4 hours at 550°C in the air. Grinding and sieving ...

Embodiment 2

[0031] The preparation process of NaY molecular sieve adsorbent modified with chlorine element is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, 100 ml of dilute nitric acid solution with a mass percent concentration of 15% was prepared for subsequent use. Accurately weigh 2.5gAl 2 o 3 , will weigh Al 2 o 3 Mix well with the above-mentioned NaY molecular sieve raw powder. Take 7ml of dilute nitric acid solution with a mass percent concentration of 15%, slowly and evenly add it dropwise to the above mixture, and then extrude it with an extruder. The molded samples are dried or oven-dried for later use.

[0032] Prepare NH with a molar concentration of 0.2mol / L 4 Cl solution 100ml. Take the above NH 4 4ml of Cl solution was evenly sprinkled on the above-mentioned formed molecular sieve carrier, and fully stirred. Dry it naturally, and bake it for 4 hours at 550°C in the air. Grinding and sie...

Embodiment 3

[0036] The preparation process of NaY molecular sieve adsorbent modified with bromine element is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 5. Subsequently, 100 ml of dilute nitric acid solution with a mass percent concentration of 15% was prepared for subsequent use. Accurately weigh 2.5gAl 2 o 3 , will weigh Al 2 o 3 Mix well with the above-mentioned NaY molecular sieve raw powder. Take 7ml of dilute nitric acid solution with a mass percent concentration of 15%, slowly and evenly add it dropwise to the above mixture, and then extrude it with an extruder. The molded samples are dried or oven-dried for later use.

[0037] Prepare NH with a molar concentration of 0.2mol / L 4 Br solution 100ml. Take the above NH 4 4ml of Br solution was evenly sprinkled on the above-mentioned formed molecular sieve carrier, and stirred thoroughly. Dry it naturally, and bake it for 4 hours at 550°C in the air. Grinding and...

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Abstract

The present invention relates to a halogen-containing molecular sieve adsorbent and a preparation method thereof, and the halogen-containing molecular sieve adsorbent mainly solves the problems of low adsorption purifying precision, low adsorption capacity, poor regeneration stability and the like of olefin adsorption purification technique in the prior art. According to the method, a group VII A element is introduced in by impregnation method, after ball rolling, sheet beating or extrusion moulding, for modification of a molecular sieve to prepare a solid adsorbent, and by the technical scheme, the method can well solve the problem, and can be used for adsorption purification industrial production for removal of sulfur compounds in a variety of olefin feedstock.

Description

technical field [0001] The invention relates to a halogen-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 downst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C07C11/08C07C7/13
Inventor 肖永厚王仰东洪涛刘苏
Owner CHINA PETROLEUM & CHEM CORP
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