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Preparation method of copper-based sulfide mercury removal agent carrier

A technology for sulfide and mercury removal, applied in chemical instruments and methods, separation methods, gas fuels, etc., can solve the problems of less research on carrier modification and lower mercury capacity

Active Publication Date: 2021-10-22
XIAN SUNWARD AEROSPACE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the research focus of copper-based sulfide mercury removal agents usually focuses on the modification and loading process of the active component copper sulfide, and there is less research on the modification of the carrier, and the carrier also plays a role in the mercury removal effect of the mercury removal agent. It plays a vital role. To prepare a mercury removal agent with good mercury removal performance, a suitable carrier must be used
In addition, mercury removal agents based on hydrated alumina still have the disadvantage of decreasing mercury capacity during use or storage, which needs to be overcome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of a copper-based sulfide mercury removal agent carrier of the present invention is specifically implemented according to the following steps:

[0026] Step 1, mixing alumina hydrate and organic acid at -10°C to 40°C to obtain mixed solution A, wherein the amount of organic acid added is 1% to 10% of the mass of alumina hydrate, and the organic acid is oxalic acid, ethyl One of diaminetetraacetic acid or citric acid;

[0027] Step 2, adding 3% to 15% tetraalkylsiloxane of alumina hydrate mass to the mixed solution of step 1, the tetraalkylsiloxane is tetramethylsiloxane or tetraethylsiloxane, and the Stir continuously under airtight conditions, and spray atomized water. The amount of atomized water used is 3 to 8 times the mass of tetraalkylsiloxane, and the mercury removal agent carrier is obtained after continuing to stir for 1 to 24 hours.

Embodiment 1

[0031] This embodiment includes the following steps:

[0032] Step 1. Mechanically mix 100g quick-release powder and 1g oxalic acid at 40°C for 10 minutes;

[0033] Step 2, continue to add 3g of tetramethylsiloxane;

[0034] Step 3: Stir the above materials continuously under airtight conditions, spray 24 g of atomized water, and continue stirring for 5 hours to obtain a mercury removal agent carrier.

Embodiment 2

[0036] This embodiment includes the following steps:

[0037] Step 1. Mechanically mix 100g of aluminum hydroxide and 5g of ethylenediaminetetraacetic acid at 30°C for 20min;

[0038] Step 2, continue to add 5g tetraethylsiloxane;

[0039] Step 3: Stir the above materials continuously under airtight conditions, spray 15 g of atomized water, and continue stirring for 1 hour to obtain a mercury removal agent carrier.

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Abstract

The invention discloses a preparation method of a copper-based sulfide mercury removal agent carrier. The method is specifically implemented according to the following steps: step 1, mixing hydrated alumina with organic acid to obtain a mixed solution A; and step 2, adding tetraalkyl siloxane into the mixed solution in the step 1, continuously stirring under a closed condition, spraying atomized water, and continuously stirring to obtain the mercury removal agent carrier. According to the preparation method of the copper-based sulfide mercury removal agent carrier, the hydrated alumina is used as a basic raw material, and the mercury removal agent with high mercury capacity can be prepared through acid modification and addition of the silicon additive.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of mercury removal agents, and relates to a preparation method of a copper-based sulfide mercury removal agent carrier. Background technique [0002] In the development of natural gas, it is found that most natural gas fields contain trace amounts of mercury. Because mercury is highly volatile, highly toxic and corrosive, it will cause serious harm to the environment and process equipment, and directly affect the development and utilization of mercury-containing natural gas. security. In natural gas liquefaction and condensate recovery units, it is generally required that the mercury content in the raw material gas should be less than 0.01μg / m 3 Because a large number of aluminum plate-fin heat exchangers are used in natural gas liquefaction and natural gas condensate recovery devices, mercury will condense and enrich in the heat exchanger, form amalgam with aluminum and make the dens...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/64C10L3/10
CPCB01D53/81B01D53/64C10L3/101B01D2257/602B01J20/16B01J20/3085B01J20/0266B01D2253/1128B01D2253/104B01D2253/25
Inventor 许龙龙张振国赵少丹黄迪王文幼薛春珍吕克罗圆
Owner XIAN SUNWARD AEROSPACE MATERIAL