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A kind of composite desulfurization adsorbent and its preparation method and application

An adsorbent and modification technology, which is applied in the direction of chemical instruments and methods, silicon compounds, refined hydrocarbon oil, etc., can solve the problems of complex desulfurization process, harsh operating conditions, unfriendly environment, etc., and achieve simplified desulfurization process and simple preparation process , The effect that the raw materials are easy to obtain

Active Publication Date: 2020-12-11
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application have found that the existing C4 desulfurization method has one or more of the following disadvantages: 1) it only has a removal effect on part of the sulfide; 2) the desulfurization depth is not enough, the desulfurization process consumes a lot of energy, and the operating conditions are harsh , the desulfurization process is not friendly to the environment; 3) Since there are many types of sulfides in C4 hydrocarbons, multiple desulfurizers are often required to be used together, which makes the desulfurization process more complicated and the operating cost is high

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  • A kind of composite desulfurization adsorbent and its preparation method and application
  • A kind of composite desulfurization adsorbent and its preparation method and application

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Effect test

Embodiment 1

[0042] The composite desulfurization adsorbent of this embodiment is prepared by the following method:

[0043] (1) Using the equal volume impregnation method, the metal active component copper nitrate is loaded on the MCM-41 mesoporous molecular sieve (the specific surface area is 1000m 2 / g), wherein the loading of copper nitrate is 30% of the mass of the mesoporous molecular sieve, and after being loaded, it is dried in an oven at 120° C. for 6 hours to obtain a modified mesoporous molecular sieve.

[0044] (2) Using the ion exchange method, use cerium nitrate-manganese nitrate-nickel nitrate metal salt solution (the concentration of nitrate ion is 0.3mol / L) to modify the 13X molecular sieve, after ion exchange for 24h, in an oven at 120 ° C Dry for 6 hours to obtain a modified microporous molecular sieve.

[0045] (3) Take by weighing 100 parts by weight of the above-mentioned modified mesoporous molecular sieve, 80 parts by weight of modified microporous molecular sieve,...

Embodiment 2

[0048] The composite desulfurization adsorbent of this embodiment is prepared by the following method:

[0049] (1) Using the equal volume impregnation method, the metal active component cobalt nitrate is loaded on the MCM-48 mesoporous molecular sieve (the specific surface area is 800m 2 / g), wherein the loading of cobalt nitrate is 25% of the mass of the mesoporous molecular sieve, and after being loaded, it is dried in an oven at 100° C. for 8 hours to obtain a modified mesoporous molecular sieve.

[0050] (2) Using the ion exchange method, using cerium nitrate-manganese nitrate metal salt solution (the concentration of nitrate ions is 0.2mol / L) to modify the 13X molecular sieve, after ion exchange for 18 hours, dry it in an oven at 100°C for 8 hours to obtain Modified microporous molecular sieve.

[0051] (3) Take by weighing 100 parts by weight of the above-mentioned modified mesoporous molecular sieve, 70 parts by weight of modified microporous molecular sieve, 20 parts ...

Embodiment 3

[0054] The composite desulfurization adsorbent of this embodiment is prepared by the following method:

[0055] (1) Using the equal volume impregnation method, the metal active component zinc nitrate is loaded on SBA-15 mesoporous molecular sieve (specific surface area is 1100m 2 / g), wherein the loading amount of zinc nitrate is 20% of the mass of the mesoporous molecular sieve, and after being loaded, it is dried in an oven at 90° C. for 12 hours to obtain a modified mesoporous molecular sieve.

[0056] (2) Adopt ion exchange method, utilize cerium nitrate-nickel nitrate metal salt solution (the concentration of nitrate ion is 0.1mol / L) to carry out modification to 13X molecular sieve, after ion exchange 12h, dry in the oven of 90 ℃ for 12h, obtain Modified microporous molecular sieve.

[0057] (3) Weigh 100 parts by weight of modified mesoporous molecular sieve, 60 parts by weight of modified microporous molecular sieve, 20 parts by weight of alumina (specific surface area...

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Abstract

The invention discloses a compound desulfurization adsorbent and a preparation method thereof. The compound desulfurization adsorbent is prepared from 100 parts by weight of modified mesoporous molecular sieve, 50 to 80 parts by weight of modified microporous molecular sieve, 20 to 30 parts by weight of aluminum oxide and 15 to 30 parts by weight of nitric acid solution. The preparation method comprises the following steps: uniformly mixing the modified mesoporous molecular sieve, the modified microporous molecular sieve, the aluminum oxide and the nitric acid solution, carrying out extrusionforming to obtain particles and curing at the room temperature; drying the cured particles and carrying out high-temperature activated roasting to obtain the compound desulfurization adsorbent. The application also provides application of the compound desulfurization adsorbent in removing sulfide in sulfur-containing substances. The compound desulfurization adsorbent disclosed by the application can effectively remove various sulfides in the sulfur-containing substances and simplifies the desulfurization process; in addition, the preparation method has the advantages of simple preparation process, easiness in raw material obtaining and lower cost.

Description

technical field [0001] This application relates to but not limited to adsorption desulfurization technology, especially to but not limited to a composite desulfurization adsorbent and its preparation method and application. Background technique [0002] C4 hydrocarbons include monoolefins (n-butene, isobutene, cis-2-butene and trans-2-butene), dienes (butadiene), alkanes (n-butane and isobutane), etc. It is an important basic raw material for petrochemical products. C4 hydrocarbons are mainly used in the production of alkylated gasoline, methyl tert-butyl ether (MTBE) and methyl ethyl ketone, etc., and have extensive and important uses in industrial production. However, C4 hydrocarbons usually contain sulfides such as disulfides, mercaptans, and sulfides. The existence of these sulfides will cause catalyst poisoning in the downstream deep processing process of carbon tetrahydrocarbons, affect the quality of subsequent products, cause the sulfur content of products to excee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/28B01J20/30C10G25/00
CPCB01J20/16B01J20/28016C10G25/003C10G2300/202
Inventor 李翔薛新房郑玉飞铁磊磊常振
Owner CHINA NAT OFFSHORE OIL CORP
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