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Efficient arsenic removal agent and preparation method thereof

A high-efficiency technology for removing arsenic, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as affecting product quality, catalyst deactivation, and inability to directly apply chemical production.

Active Publication Date: 2021-05-07
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the ethylene industry, hydrocarbon cracking, catalytic reforming, hydrogenation processes and other processes will contain a very small amount of arsenic. Although the content of arsenic is very low, it can cause catalyst poisoning, resulting in catalyst loss in subsequent processes. Live, directly affect product quality
Therefore, in order to avoid the above problems, it is necessary to remove arsenide as much as possible, otherwise it cannot be directly applied in subsequent chemical production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of arsenic removal agent 1 is as follows:

[0028] (1) Mix 100g13x molecular sieve, 54g titanium dioxide, pseudoboehmite and hydroxymethyl cellulose evenly, roll into balls, bake at 150°C for 2 hours, and coat 30g of TS-1 on the outermost layer by rolling ball again Titanium-silicon molecular sieve, baked at 150°C for 2 hours, and roasted at 550°C for 4 hours;

[0029] (2) Immerse the equal volume of the roasted product in step (1) in a solution containing 57.07gNi(NO 3 ) 2 and 0.39g K 2 PtCl 4 solution, then baked at 80°C for 6h, and baked at 450°C for 2h;

[0030] (3) Immerse the equal volume of the calcined product in step (2) in 0.28gLa(NO 3 ) 3 ·6H 2 In the solution of O, bake at 80°C for 6h, and bake at 450°C for 2h;

[0031] (4) Activate the roasted product in step (3) in a mixed atmosphere of hydrogen, nitrogen and water vapor at 400°C for 2 hours, and the gas space velocity is 1600 hours -1 . Cool to room temperature in nitrogen to obt...

Embodiment 2

[0033] The preparation of arsenic removal agent 2 is as follows:

[0034] (1) Mix 100g13x molecular sieve, 36g titanium dioxide, silica sol and hydroxymethyl cellulose evenly, roll into a ball, bake at 80°C for 6 hours, and coat 45g of TS-1 titanium silicon on the outermost layer by rolling ball again Molecular sieve, baked at 80°C for 6h, and roasted at 650°C for 4h;

[0035] (2) The equal volume of the roasted product in step (1) is impregnated with 70.40g Fe(NO 3 ) 3 and 1.70g of ruthenium nitrate solution, then baked at 90°C for 4h, and then roasted at 360°C for 3h;

[0036] (3) Immerse the equal volume of the calcined product in step (2) in 0.28gLa(NO 3 ) 3 ·6H 2 O and 0.21gCe(NO 3 ) 3 In the solution, bake at 90°C for 4h, and bake at 360°C for 3h;

[0037] (4) Activate the roasted product in step (3) in a mixed atmosphere of hydrogen, nitrogen and water vapor at 400°C for 4 hours, and the gas space velocity is 1800 hours -1 . Cool to room temperature in nitroge...

Embodiment 3

[0039] The preparation of arsenic removal agent 3 is as follows:

[0040] (1) Mix 100g 13x molecular sieve, 25g titanium dioxide, 20g zirconium dioxide, aluminum sol and safflower powder evenly, roll into balls, bake at 120°C for 4 hours, and coat 50g of TS- 1 Titanium silicon molecular sieve, baked at 120°C for 4 hours, and roasted at 750°C for 2 hours;

[0041] (2) Immerse an equal volume of the calcined product in step (1) in a solution containing 18.14g Co(NO 3 ) 2 and 2.18gRh(NO 3 ) 3 solution, then baked at 110°C for 3h, and baked at 420°C for 2h;

[0042] (3) Immerse the equal volume of the roasted product in step (2) in a solution containing 0.45g Ce(NO 3 )3 solution, then baked at 110°C for 3h, and baked at 420°C for 2h;

[0043] (4) Activate the roasted product in step (3) in a mixed atmosphere of hydrogen, nitrogen and water vapor at 400°C for 3 hours, and the gas space velocity is 1200 hours -1 . Cool to room temperature in nitrogen to obtain the arsenic re...

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PUM

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Abstract

The invention discloses an efficient arsenic removal agent and a preparation method thereof, and belongs to the technical field of arsenic removal purification, the arsenic removal agent is composed of a 13x molecular sieve and a TS-1 titanium silicalite molecular sieve as a carrier I, an IVB group element as a carrier II, a VIII group fourth period element as a main agent I, VIII group fifth and sixth period elements as main agents II, and a lanthanide element as an auxiliary agent. The efficient arsenic removal agent provided by the invention has the advantages of high arsenic capacity, high arsenic removal precision, good stability and long service life, and can be used for purification in the fields of natural gas, synthesis gas, flue gas, coal gas, blast furnace gas, coke oven gas, light gas-liquid hydrocarbon, ethylene-rich gas and the like.

Description

technical field [0001] The invention belongs to the technical field of arsenic removal and purification, and in particular relates to an efficient arsenic removal agent and a preparation method thereof. Background technique [0002] In the ethylene industry, hydrocarbon cracking, catalytic reforming, hydrogenation processes and other processes will contain a very small amount of arsenic. Although the content of arsenic is very low, it can cause catalyst poisoning, resulting in catalyst loss in subsequent processes. Live, directly affect product quality. Therefore, in order to avoid the above problems, it is necessary to remove the arsenide as much as possible, otherwise it cannot be directly applied in the subsequent chemical production. [0003] At present, the commonly used arsenic removal agents in industry are mainly divided into copper-based arsenic removers, nickel-based arsenic removers, lead-based arsenic removers and manganese-based arsenic removers. [0004] Chin...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30
CPCB01J20/186B01J20/06
Inventor 陈凯张先茂王泽王瑜王国兴郑敏王天元金建涛王栋斌沈康文
Owner WUHAN KELIN FINE CHEM
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