Lead-based de-arsenic catalyst

A technology for removing and transitioning metals, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, refined hydrocarbon oil, etc. Achieve a wide range of applications, simplify the process, and reduce costs

Inactive Publication Date: 2009-12-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the scope of application of the lead-based arsenic removal agent in the prior art is relatively small, and it cannot be applied to the removal of arsen

Method used

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  • Lead-based de-arsenic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Preparation of lead-based dearsenic agent carrier of the present invention

[0021] To Al(OH) 3 Add appropriate amount of hydrochloric acid to the powder to prepare AlCl 3 The solution is then acidified by adding nitric acid, then neutralized with ammonia, after aging, filter press, slurrying and other processes, and finally after acidification and peptization at the ball-forming station, then the ball is prepared by the method of dropping the ball, at 500-700℃ Roasted to obtain active Al 2 O 3 Ball, the pore volume is 0.4-0.6mL / g.

[0022] Preparation of lead-based dearsenic agent of the present invention

Example Embodiment

[0023] Example 1

[0024] Calculate with the mass percentage of PbO in the finished lead-based dearsenic agent as 10%, take 0.0448mol of lead acetate to make a saturated solution, spray 80.00g activated alumina balls with a sugar coater, dry, roast at 400℃, and cool down. A semi-finished product of lead-based dearsenic agent is obtained.

[0025] In this embodiment, the mass percentage of NiO in the finished lead-based dearsenic agent is calculated as 10%, and 0.1333mol Ni(NO 3 ) 2 Prepare a solution to spray and soak the semi-finished lead-based dearsenic agent, isolate the air, and roast at 500° C. to obtain the finished lead-based dearsenic agent.

Example Embodiment

[0026] Example 2

[0027] Taking the PbO content of the finished lead-based dearsenic agent as 25% by mass, take 0.1121mol of lead acetate to make a saturated solution, spray 60.00g activated alumina balls with a sugar coater, dry, roast at 450℃, and cool down. A semi-finished product of lead-based dearsenic agent is obtained.

[0028] In this example, the mass percentage of CoO in the finished lead-based dearsenic agent is calculated as 15%, and 0.2000mol Co(NO 3 ) 2 Prepare a solution to spray and soak the semi-finished lead-based dearsenic agent, isolate the air, and roast at 500° C. to obtain the finished lead-based dearsenic agent.

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Abstract

The invention provides a lead-based de-arsenic catalyst, comprising a carrier and an active constitute. The invention is characterized in that the carrier is Al2O3, the mass percentage content is 50-80%, the pore volume is 0.4-0.6mL/g; the active constitute is one or more transition metal oxides and PbO, the mass content of PbO is 10-30%, the mass content of one or more transition metal oxides is 10-20%. The lead-based de-arsenic catalyst in the invention has the advantages that the application range is wide, the invention can be applied to the dearsenization of liquid hydrocarbon and gaseous hydrocarbon; the dearsenization effect is good, the dearsenization rate can be as high as 99.9%; when the hydrocarbon feedstock contains certain amount of sulphide, the dearsenization effect of the lead-based de-arsenic catalyst in the invention cannot be affected and the dearsenization rate is still high.

Description

technical field [0001] The invention relates to an arsenic removal agent, in particular to a lead-based arsenic removal agent suitable for gaseous or liquid hydrocarbons. Background technique [0002] In the ethylene industry, in the process of hydrocarbon cracking, catalytic reforming, hydrogenation process, etc., a very small amount of arsenic compounds in raw oil may poison the catalyst and reduce the catalytic activity. Therefore, it is very necessary to reduce the arsenic compound in the raw material as much as possible in the ethylene unit. For example, in order to protect the downstream noble metal hydrogenation catalyst from arsenic poisoning and reduce the catalytic activity, some units are equipped with a post-arsenic removal process for cracked products. , requiring the C 2 、C 3 And the removal of arsenic in its mixed materials. The arsenic removal agents in the prior art include nickel-based arsenic removal agents, copper-based arsenic removal agents, and lead...

Claims

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Application Information

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IPC IPC(8): B01J23/835B01J23/28B01J23/887C07C7/148C10G27/00
Inventor 刘玉珍李景斌
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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