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Modified de-arsenic catalyst and preparation method thereof

A technology for arsenic removal and modification, applied in chemical instruments and methods, refining with metal oxides, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, high production cost, and inapplicability to large-scale industrial production. Achieve the effect of ensuring the efficiency of arsenic removal, reducing the content of metal copper, and simple steps

Active 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

[0006] For this reason, the technical problem to be solved by the present invention is: to overcome the shortcomings of high production cost and complicated preparation process in the prior art, and not suitable for large-scale industrial production, and to provide a low-cost, simple preparation process, suitable for large-scale A modified arsenic removal agent for large-scale industrial production, and further provides a preparation method for the modified arsenic removal agent

Method used

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preparation example Construction

[0020] The preparation process of the modified arsenic removal agent of the present invention will be described in detail below. The preparation process of the modified arsenic removal agent can be divided into two steps: the step of preparing copper-zinc-aluminum mixture and the step of kneading.

[0021] Preparation step of copper-zinc-aluminum mixture

[0022] Mix copper sulfate solution with sodium carbonate solution, neutralize and age to obtain copper carbonate suspension; add zinc oxide and / or zinc oxide precursor and aluminum oxide and / or aluminum oxide precursor to the suspension A mixed suspension is formed; the mixed suspension is press-filtered and roasted to prepare a mixture containing copper, zinc and aluminum; wherein, the ratio of substances of copper, zinc, and aluminum compounds in the mixture is 3-6: 3-6: 1-5.

[0023] Wherein, the process of preparing copper carbonate suspension is well known to those skilled in the art, so it will not be repeated here....

Embodiment 1

[0030] Example 1 Preparation of modified arsenic removal agent C1

[0031] 13g / ml copper sulfate solution is mixed with 9g / ml sodium carbonate solution, and after neutralization and aging, copper carbonate suspension is obtained; zinc oxide and aluminum hydroxide are added to the suspension to form a mixed suspension; the After mixing, the suspension was filtered three times, and then calcined at 280° C. for 5 hours to prepare a mixture containing copper, zinc and aluminum.

[0032] The mixture containing copper, zinc and aluminum is mixed with high-sulfur capacity powder and water, and the molded product is obtained after kneading. After repeated drying process twice, it is roasted at 350°C for 3 hours to obtain the finished arsenic removal agent C1. The physical and chemical properties of C1 are shown in Table 1.

Embodiment 2

[0033] Example 2 Preparation of modified arsenic removal agent C2

[0034] Mix 17g / ml copper sulfate solution with 15g / ml sodium carbonate solution, neutralize and age to obtain a copper carbonate suspension; add basic zinc carbonate and aluminum oxide to the suspension to form a mixed suspension; After the mixed suspension was filtered once, it was calcined three times at 350° C. for 3 hours each time to prepare a mixture containing copper, zinc and aluminum.

[0035] Mix the mixture containing copper, zinc and aluminum with nickel oxide and water, and knead to obtain a molded product. After one drying process, it is repeatedly roasted at 280 ° C for 2 times, and the roasting time is 5 hours each time to obtain the finished product. Arsenic C2. The physical and chemical properties of C2 are shown in Table 1.

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Abstract

The invention relates to a modified de-arsenic catalyst, comprising the following materials by weight: 15-30wt% of copper oxide, 15-30wt% of zinc oxide, 20-28wt% of VIII group metal oxides, 5-10wt% of aluminum oxide and the balance of inactive substances. The preparation method comprises the following steps: a) preparing copper carbonate suspension, adding zinc oxide and / or a zinc oxide precursorand aluminium oxide and / or an aluminium oxide precursor to form mixed suspension, then filter-pressing and baking the mixed suspension to obtain a mixture which contains copper, zinc and aluminium, wherein, the substance ratio of the respective compound of copper, zinc and aluminium in the mixture is 3-6:3-6:1-5; and b) mixing the mixture which is obtained in step a) and contains copper, zinc andaluminium with the material which contains VIII group metal compounds, also with additive and water, kneading to obtain a moulding material, finally drying and baking to obtain the finished products of modified de-arsenic catalyst. The modified de-arsenic catalyst in the invention has the advantages of low cost and simple manufacturing process.

Description

technical field [0001] The invention belongs to the field of arsenic removal catalysts, in particular to an arsenic removal agent for deep removal of arsenic compounds in various oil products and a preparation method thereof. Background technique [0002] In recent years, with the continuous exploitation of crude oil, the content of arsenic in oil has been increasing year by year. Products obtained from the secondary processing of high-arsenic oils, such as the polymerization of propylene, ethylene and other materials or their deep processing, the arsine in the materials will cause the poisoning of the catalyst used, which requires deep dearsenization of the materials. Therefore, the research on arsenic removal agent has received extensive attention. [0003] Chinese patent CN100998944A discloses a production method of arsenic removal agent, including: preparation of copper carbonate; co-precipitation, mixing and stirring copper carbonate decoration filter cake, zinc carbon...

Claims

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Application Information

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IPC IPC(8): C10G29/16B01J23/06B01J21/04B01J27/232
Inventor 刘玉珍李景斌
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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