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Metal compound-type arsenic removal agent, preparation method and application thereof

A metal complex and arsenic removal technology, which can be used in the refining of metal oxides, chemical instruments and methods, and refined hydrocarbon oil, etc. Simple, extended regeneration cycle, and the effect of large specific surface area

Inactive Publication Date: 2014-06-25
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the preparation of the arsenic removal agent mainly uses the conventional impregnation method, co-precipitation method, decomposition method, mechanical mixing method and other methods, and the uniform and effective dispersion of the active components on the carrier may not reach the best state.
In terms of application, the existing technology has the following shortcomings: (1) low arsenic capacity, poor arsenic removal efficiency, and short service life
(2) The use of active metals is large, the cost and energy consumption are high, and it is not suitable for large-scale industrial production
(3) Not widely applicable

Method used

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  • Metal compound-type arsenic removal agent, preparation method and application thereof
  • Metal compound-type arsenic removal agent, preparation method and application thereof
  • Metal compound-type arsenic removal agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Activated carbon treatment (for all activated carbons)

[0046] Weigh 10g of coconut shell activated carbon (the average pore diameter is about 1.5nm, the particle size is about 3×6mm, and the specific surface area is ≥500m2 / g) and add it to 50ml of mixed acid of 0.1N nitric acid and 0.3N hydrochloric acid (the volume ratio of the two acids is 1 : 1), boiled for 7 hours, filtered and washed until the pH value of the filtrate was 6-7, and the obtained activated carbon was dried at 120° C. for 6 hours to obtain acid-treated activated carbon.

[0047] Preparation of arsenic removal agent (Ni(OH) 2 20% / coconut shell charcoal)

[0048] 10.5g of Ni(NO 3 ) 2 ·6H 2 O is dissolved in water to the mark of 40ml (as Ni(OH) 220% by weight), under stirring, add the above-mentioned activated carbon (absorption rate is about 400%) to make the solution completely absorbed in the carbon carrier and let it stand for 2 hours, then put it into an 80ml hydrothermal reaction kettle and...

Embodiment 2

[0050] Preparation of arsenic removal agent (Cu(OH) 2 20% / coconut shell charcoal)

[0051] Process coconut shell charcoal by embodiment 1 method. 8.3 g of Cu(NO 3 ) 2 ·3H 2 O is dissolved in water to the mark of 40ml (as Cu(OH) 2 20% by weight), under stirring, add the above-mentioned activated carbon (absorption rate is about 400%) to make the solution completely absorbed in the carbon carrier and let it stand for 2 hours, then put it into an 80ml hydrothermal reaction kettle and add 20ml Water, under the condition of 200°C, carry out hydrothermal reaction for 5 hours. After the sample was taken out, it was dried in a vacuum oven at 100° C. to obtain the catalyst of Example 2. The evaluation results of arsenic removal showed that the arsenic removal rate was 84.8%.

Embodiment 3

[0053] Preparation of arsenic removal agent (Fe(OH) 3 20% / coconut shell charcoal)

[0054] Process coconut shell charcoal by embodiment 1 method. 12.6 g of Fe(NO 3 ) 2 9H 2 O is dissolved in water to the mark of 40ml (as Fe(OH) 3 20% by weight), under stirring, add the above-mentioned activated carbon (absorption rate is about 400%) to make the solution completely absorbed in the carbon carrier and let it stand for 2 hours, then put it into an 80ml hydrothermal reaction kettle and add 20ml Water, under the condition of 200°C, carry out hydrothermal reaction for 5 hours. After the sample was taken out, it was dried in a vacuum oven at 100° C. to obtain the catalyst of Example 3. The evaluation results of arsenic removal showed that the arsenic removal rate was 71.1%.

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Abstract

The invention discloses a metal compound-type arsenic removal agent, a preparation method and an application thereof, the metal compound-type arsenic removal agent is composed of a carrier and a metal active ingredient loaded on the carrier; the carrier is active carbon, and the metal active ingredient is more than one selected from copper, iron, nickel or silver. The arsenic removal agent has the advantages of simple production technology, large specific surface area, and good active metal dispersibility, deep arsenic removal of the oil product can be realized, surface acidity is low, the colloid generation is reduced, so that the arsenic removal agent is benefit for prolonging the regeneration period of a catalyst, the arsenic removal agent has the advantages of high arsenic removal rate and low energy consumption, and is suitable for large-scale industrial production, and can be used for removing arsenic from the light dydrocarbon materials such as propylene, ethene and deeply purifying arsenic in synthetic gas prepared by taking coal, coke, heavy oil, oil residue or natural gas as raw materials.

Description

technical field [0001] The invention relates to an arsenic removal agent for hydrofining of oil products, and can also be used for pre-arsenic removal before cracking furnaces of ethylene plants and the like. Background technique [0002] Petroleum contains many elements and their compounds that are harmful to petroleum processing, and arsenic is one of them. In the crude oil distillation process, various arsenic compounds enter into distillates such as gasoline, diesel and heavy oil according to their boiling points, which will lead to poisoning of some catalysts used in the subsequent processing of each distillate. As far as the reforming process is concerned, the platinum-based noble metal catalysts it uses are extremely sensitive to arsenic, and a small amount of arsenic compounds will permanently poison such catalysts, which is quite harmful. Therefore, the reforming process has very strict requirements on the arsenic content in the feed, generally less than 1 ng / g. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C10G25/00C10G29/16
Inventor 唐博合金马晓姣张伟周群群高艺龙吴建祥王俊影腾大全马春娟赵家昌潘建民
Owner SHANGHAI UNIV OF ENG SCI
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