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A kind of preparation method of copper-based sulfide mercury removing agent carrier
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A sulfide and mercury removal technology, applied in chemical instruments and methods, separation methods, gas fuels, etc., can solve the problems of reduced mercury volume and less research on carrier modification.
Active Publication Date: 2022-07-01
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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[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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preparation example Construction
[0025] A preparation method of a copper-based sulfide mercury removal agent carrier of the present invention is specifically implemented according to the following steps:
[0026] In step 1, the hydrated alumina and the organic acid are mixed at -10°C to 40°C to obtain a mixed solution A, wherein the organic acid is added in an amount of 1% to 10% of the mass of the hydrated alumina, and the organic acid is oxalic acid, ethyl acetate and oxalic acid. One of diaminetetraacetic acid or citric acid;
[0027] In step 2, tetraalkylsiloxane with 3% to 15% by mass of hydrated alumina is added to the mixed solution in step 1, and the tetraalkylsiloxane is tetramethylsiloxane or tetraethylsiloxane. Continuously stirring under airtight conditions, and spraying atomized water, the amount of atomized water is 3-8 times of the mass of tetraalkylsiloxane, and the mercury removal agent carrier is obtained after continuous stirring for 1-24 hours.
Embodiment 1
[0031] This embodiment includes the following steps:
[0032] Step 1. Mechanically mix 100g of quick-release powder and 1g of oxalic acid at 40°C for 10min;
[0033] Step 2, continue to add 3g tetramethylsiloxane;
[0034] Step 3: The above materials are continuously stirred under airtight conditions, and 24g of atomized water is sprayed in, and the mercury removal agent carrier is obtained after continuing to stir for 5 hours.
Embodiment 2
[0036] This embodiment includes the following steps:
[0037] Step 1, mechanically mixing 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: The above materials are continuously stirred under airtight conditions, 15 g of atomized water is sprayed, and the mercury removal agent carrier is obtained after continuing to stir for 1 hour.
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Abstract
The invention discloses a preparation method of a copper-based sulfide mercury removal agent carrier, which is specifically implemented according to the following steps: step 1, mixing hydrated alumina and organic acid to obtain a mixed solution A; step 2, adding the mixed solution of step 1 to The tetraalkylsiloxane is added to the medium, the mixture is continuously stirred under airtight conditions, sprayed with atomized water, and the mercury remover carrier is obtained after continuous stirring. The method for preparing a copper-based sulfide mercury removal agent carrier of the present invention uses hydrated alumina as a basic raw material, and can prepare a mercury removal agent with high mercury content through acid modification and addition of silicon auxiliary agent.
Description
technical field [0001] The invention belongs to the technical field of preparation methods for mercury removing agents, and relates to a preparation method for a copper-based sulfide mercury removing agent carrier. Background technique [0002] In natural gas development, 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 devices, it is generally required that the mercury content in the raw gas is less than 0.01μg / m2 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, forming amalgam with aluminum and making a dense aluminum ...
Claims
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Application Information
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