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Light hydrocarbon dearsenicating agent and its preparing method

A technology for removing arsenic and desulfurizing agent, which is used in the application field of hydrocarbon desulfurizing agent and/or desulfurizing agent, gaseous hydrocarbon and liquid C1-8 hydrocarbon desulfurization or desulfurizing. De-arsenic and desulfurization activity, etc., to achieve the effect of recovering the de-arsenic performance and increasing the service life

Inactive Publication Date: 2006-08-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no suggestion of arsenic and desulfurization agents with high arsenic and desulfurization activity for liquid light hydrocarbons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of arsenic removal agent

[0033] Add 3% by weight of silver nitrate to 100 grams of spherical aluminum oxide carrier produced by the quick release method to prepare an impregnation solution, which is prepared by the "dry impregnation method". The weight percentage of silver in the arsenic removal agent is 2.5%, and the impregnated arsenic removal agent is dried at 110-120° C. for several hours before use. The form of silver in the arsenic removal agent prepared by this method is ionic silver. The particle size of the arsenic removal agent is φ2.0~3.5mm. The test is carried out in a fixed bed. The reactor is a φ14×2×480 stainless steel tube. The arsenic removal agent is cut into 1 / 2~1 / 4 of the size of the original particle. 2.0ml. The test raw material is the cracked gas from the ethylene plant, and arsine is added artificially.

[0034] The pyrolysis gas containing about 1000 ppb of arsenic is passed through the above-mentioned arsenic removal agent, and...

Embodiment 2

[0040] In this example, the arsenic removal agent prepared in Example 1 was neutralized with sodium hydroxide solution, and after the reaction was complete, it was rinsed with water several times to wash away Na + and NO 3 - , then dry. The test raw material is arsenic cracking gas. The form of silver in the catalyst is silver in an oxidized state.

[0041] The arsenic removal results of the above-mentioned arsenic removal agents are listed in Table 3.

[0042]

[0043] 634

[0044] time h

Embodiment 3

[0046] In this example, the arsenic removal agent prepared in Example 1 was decomposed in air at 450° C. for 4 hours. The test raw material is also cracked gas with arsenic. The form of silver in the arsenic removal agent is elemental silver.

[0047] The arsenic removal results of the above-mentioned arsenic removal agents are listed in Table 4.

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Abstract

The invention relates to a kind of gaseous state / liquid state light hydrocarbon de-arsenic agent or de-arsenic desulfurizing agent, and its usage in cracking gaseous state / liquid state C1-8 hydrocarbon de-arsenic or de-arsenic desulfurization. The de-arsenic agent mentioned above is composed with silver and carrier; and the silver exists in more than one form of silver oxide (1), silver oxide (2), silver with ion state, silver with metallic state. The de-arsenic desulfurizing agent mentioned above is composed with silver compounds, iron compounds and carrier. Calculating by total amount of de-arsenic desulfurizing agent, iron is with 0.05-20% weight percent, and weight ratio of silver and iron is 0.1:1-1:1.

Description

technical field [0001] The invention relates to a hydrocarbon dearsenic agent and / or arsenic desulfurizer and application thereof. More specifically, the present invention relates to the arsenic and desulfurization agent composed of silver compound and carrier or silver compound and iron compound and carrier and in gaseous hydrocarbon and liquid C 1-8 Application in hydrocarbon de-arsenic or de-arsenic desulfurization. Background technique [0002] Various forms of arsenic such as arsine, methyl arsine, ethyl arsine, trimethyl arsine, triethyl arsine and triphenyl arsine are known to exist in most crude oils and shale oils . When such oils are separated by cracking, fractionation, or other methods, these arsenic compounds enter the product fractions according to their boiling points. When these petroleum fractions are subjected to further processing, especially involving further processing with catalysts composed of noble metals, arsenic is extremely harmful since it can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/12
Inventor 余启炎冷冰袁霞光郝雪松杨晓红刘菊安闫丽梅马志远代增悦石翠
Owner CHINA PETROLEUM & CHEM CORP