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Method of eliminating arsenic in acetylene containing hydrocarbon and dearsenic agent

A technology of alkyne-containing hydrocarbons and alkyne hydrocarbons, which is applied in the direction of refining to remove heteroatoms, etc., to achieve the effects of simple preparation methods, large arsenic removal capacity, and reduced preparation costs

Inactive Publication Date: 2006-09-06
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many processes for the removal of arsenic have been developed, there is no indication that a method for the removal of arsenic from alkyne-containing hydrocarbons has been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of arsenic removal catalyst:

[0026] Add aluminum nitrate [Al(NO 3 ) 3 9H 2 O]375.2 grams (1.0mol) and zinc nitrate [Zn(NO 3 ) 2 ·6H 2 O]119 grams (0.4mol) and silver nitrate (AgNO 3 ) 4.12 grams, then add 200mL of deionized water, stir well and make a precursor solution containing the required metal components, after incubating at 50-55°C in a constant temperature bath, add 40wt% Na 2 CO 3 The solution is aged until the pH value of the solution is between 7.5 and 9, and centrifuged after aging for 0.5 hour to obtain a solid material. The solid material was reslurried with deionized water to fully remove soluble sodium salts, further dried at 120°C, and then burned in a high-temperature furnace at 500°C for 12 hours, and then stored in a vacuum desiccator for future use. The specific surface area of ​​the arsenic removal agent obtained by the above preparation method is 150m 2 / g, pore volume 0.45mL / g, bulk density 0.7g / cm 3 , the most likely a...

Embodiment 2-15

[0030] Except temperature, pressure, gas space velocity, hydrogen content and other conditions of arsenic removal are controlled and changed, other operations are the same as in Example 1, and the numbers of temperature, pressure, gas space velocity, and hydrogen content conditions are shown in Table 1. The results of arsenic removal are shown in Table 1.

[0031] implement

Embodiment 16

[0033]Get 50 grams of the arsenic removal agent prepared by the method in Example 1, fill it in a fixed-bed reactor with an inner diameter of 33 mm, and use hydrogen-nitrogen mixed gas (H 2 / N 2 (v / v)=1:1) after reduction for 4 hours, the temperature was lowered to 50-60°C. Feed with 3.0% (volume) hydrogen and 500ppb arsenic (as AsH 3 form) containing propyne, propane and propene mixed C 3 Gas, keep the gas space velocity at 2500h -1 , after 300 hours of continuous treatment, the arsenic concentration at the detection outlet was less than 5ppb.

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Abstract

A process for removing As from the acetylene hydrocarbon includes loading the dearsenicating agent to fixed bed, adding hydrogen gas to the acetylene hydrocarbon, and passing then through said fixed bed at 0-150 deg.C and 4000 / hr under 0.01-3 MPa. Said dearsenicating agent is composed of carrier and the active component which is at least one transition metal and / or transition metal oxide. Its advantages are suppressing the chemical reaction between acetylene hydrocarbon and the active component of catalyst, high effect and activity, and low cost.

Description

technical field [0001] The invention relates to a method for removing arsenic in alkyne-containing hydrocarbons and an arsenic removing agent. Background technique [0002] As we all know, petroleum crude oil may contain many trace harmful components, usually in the form of elemental organic compounds, and these elemental organic compounds can poison catalysts used in petroleum refining processes, especially selective hydrogenation catalysts are more susceptible Permanent poisoning due to the influence of organic compounds of these elements. Although in the production of olefins such as ethylene and propylene, most of the elemental organic compounds in the crude oil are well removed after distillation, vacuum distillation and catalytic cracking, but arsenic is easy to generate some volatile compounds , mainly exists in the form of arsine, monomethylarsine, dimethylarsine, trimethylarsine, tributylarsine, etc., and its content is mostly in 10 -6 ~10 -7 Within the range, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04C10G45/02
Inventor 曹育才李建龙马静君
Owner SHANGHAI RES INST OF CHEM IND
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