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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

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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 arsenic of liquid hydrocarbons and gaseous hydrocarbons at the same time or the removal efficiency of arsenic when the raw hydrocarbon contains sulfide is not high, thus providing a lead-based arsenic removal agent with a wide range of application

Method used

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  • Lead-based de-arsenic catalyst

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preparation example Construction

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

[0021] to Al(OH) 3 Add appropriate amount of hydrochloric acid to the powder to prepare AlCl 3 Solution, add nitric acid to acidify, then neutralize with ammonia water, after aging, pressure filtration, pulping and other processes, and finally acidify and peptize at the ball forming station, and then prepare balls by dropping balls, at 500-700 ° C Roasting to get active Al 2 o 3 Balls with a pore volume of 0.4-0.6 mL / g.

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

Embodiment 1

[0024] Assuming that the mass percentage of PbO in the finished lead-based arsenic removal agent is 10%, take 0.0448mol of lead acetate to make a saturated solution, use a sugar coating machine to spray and dip 80.00g of activated alumina balls, dry, roast at 400°C, and cool to Obtain the semi-finished product of lead-based arsenic removal agent.

[0025] In the present embodiment, with the mass percentage of NiO in the finished product lead-based arsenic removal agent being 10%, 0.1333mol Ni (NO 3 ) 2 Prepare a solution to spray and immerse the semi-finished lead-based arsenic removal agent, isolate the air, and roast at 500°C to obtain the finished lead-based arsenic removal agent.

Embodiment 2

[0027] Assuming that the mass percentage of PbO in the finished lead-based arsenic removal agent is 25%, take 0.1121mol of lead acetate to make a saturated solution, use a sugar coating machine to spray and dip 60.00g of activated alumina balls, dry, roast at 450°C, and cool to Obtain the semi-finished product of lead-based arsenic removal agent.

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