Load-type dearsenic agent and preparation method

A load-type, arsenic-removing technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems that it is difficult to further improve the adsorption capacity and arsenic removal rate of the arsenic-removing agent, uneven distribution of pores and pore sizes, and small specific surface area. , to achieve enhanced adsorption, uniform dispersion of pores and pore sizes, and increased specific surface area

Active Publication Date: 2013-11-20
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first technical problem to be solved by the present invention is that in the prior art, when activated carbon is used as a carrier to prepare a loaded arsenic removal agent, after pretreatment of the activated carbon carrier including alkali pre-soaking, surface oxidation treatment and acid treatment, there are still Due to the problems of small specific surface area, small pore volume, and uneven distribution of pore channels and pore sizes, it is difficult to further improve the adsorption capacity and arsenic removal rate of the arsenic removal agent, thereby providing a loaded arsenic removal agent with high arsenic capacity

Method used

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  • Load-type dearsenic agent and preparation method
  • Load-type dearsenic agent and preparation method

Examples

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Embodiment 1

[0030] The load-type arsenic removal agent described in this example is composed of a carrier and an active component, the carrier is a wood activated carbon carrier, the active component is copper oxide, and the copper oxide is in the total weight of the load-type arsenic removal agent The mass fraction is 10wt%.

[0031] The preparation method of the loaded arsenic removal agent described in this embodiment comprises the following steps:

[0032](1) Pretreatment of the activated carbon carrier: at 50°C, impregnate the activated carbon carrier with a nitric acid solution with a mass concentration of 5% for 2 hours, and control the mass ratio of the nitric acid solution to the activated carbon carrier to be 3:1, and then Drying at 120°C for 8 hours, and roasting at 300°C for 2 hours under the protection of nitrogen to obtain the pretreated activated carbon carrier;

[0033] (2) Preparation of loaded arsenic removal agent:

[0034] a. Weigh 39.5g of basic copper carbonate, 37...

Embodiment 2

[0037] The load-type arsenic removal agent described in this embodiment is composed of a carrier and an active component, the carrier is coal-based activated carbon carrier, the active component is copper oxide, and the total weight of the copper oxide in the load-type arsenic removal agent The mass fraction in is 11wt%.

[0038] The preparation method of the loaded arsenic removal agent described in this embodiment comprises the following steps:

[0039] (1) Pretreatment of the activated carbon carrier: at 25°C, the activated carbon carrier was impregnated with a nitric acid solution with a mass concentration of 5% for 3 hours, and the mass ratio of the nitric acid solution to the activated carbon carrier was controlled to be 3:1, and then Drying at 110°C for 9 hours, and roasting at 200°C for 3 hours under the protection of nitrogen to obtain the pretreated activated carbon carrier;

[0040] (2) Preparation of loaded arsenic removal agent:

[0041] a. Weigh 40g of copper s...

Embodiment 3

[0044] The load-type arsenic removal agent described in this embodiment is composed of a carrier and an active component, the carrier is coal-based activated carbon carrier, the active component is copper oxide, and the total weight of the copper oxide in the load-type arsenic removal agent The mass fraction in is 12wt%.

[0045] The preparation method of the loaded arsenic removal agent described in this embodiment comprises the following steps:

[0046] (1) Pretreatment of the activated carbon carrier: at 20°C, the activated carbon carrier was impregnated with a nitric acid solution with a mass concentration of 5% for 5 hours, and the mass ratio of the acid solution to the activated carbon carrier was controlled to be 3:1, and then Dry at 120°C for 8 hours, and roast at 500°C for 1 hour under the protection of nitrogen to obtain the pretreated activated carbon carrier;

[0047] (2) Preparation of loaded arsenic removal agent:

[0048] a. Weigh 104g of copper nitrate and ad...

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Abstract

The invention relates to a load-type dearsenic agent. The load-type dearsenic agent is composed of carriers and active components. The carriers are activated carbon carriers. The active components are metal oxides. When the load-type dearsenic agent is prepared, first, the activated carbon carriers are pretreated, the activated carbon carriers are subjected to surface treatment only by strong oxidizing acid liquids and then calcined in inert gases, the structural characteristics of the activated carbon carriers can be optimized, the pore volume and the specific surface area of the activated carbon carriers are increased, and the dispersion of the pore channels and the pore diameters is uniform and ordered; second, in the production method, the semi-finished product of the load-type dearsenic agent is prepared first, and then subjected to alkali treatment, and so the active metal salt components loaded on the activated carbon carriers can be decomposed into active metal oxide components at a low temperature.

Description

technical field [0001] The invention relates to a loaded arsenic removal agent and a preparation method thereof, belonging to the technical field of arsenic removal agents. Background technique [0002] In order to reduce the content of olefins and sulfur in gasoline and minimize the loss of gasoline octane number, in the process of refining gasoline, it is necessary to carry out selective hydrogenation, hydrodesulfurization, etherification and isomerization, etc. deal with. In selective hydrotreating, the commonly used hydrogenation catalyst is the noble metal palladium as the active component. This type of hydrogenation catalyst is easily affected by the heavy metals contained in gasoline, especially arsenic, and thus permanently poisoned. Inactivate. Studies have shown that when the arsenic content is low and the mass fraction is less than 10 ppb, the hydrogenation catalyst can be used for several years, but when the arsenic content is higher than tens of ppb, the life ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30
Inventor 赵素云
Owner SHENYANG SANJUKAITE CATALYST
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