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A kind of preparation method of deep desulfurization catalyst

Active Publication Date: 2021-12-07
山东法恩泰科技工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of heteropolyacid catalysts, there are problems of difficult recovery and serious loss of catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Catalyst preparation method is as follows:

[0013] (1) Molecular sieves are obtained as catalyst supports by surface modification of 13X molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (sulfuric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:1 to improve Molecular sieve surface properties; then use a solution of rare earth metal ions (cerium nitrate) to impregnate the pretreated molecular sieve with equal volume to realize ion exchange, and the concentration of the rare earth metal ions is 0.1mol / L.

[0014] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it to the reactor after cooling, and add 60mL of toluene and 0.2mL of silane coupling agent to it, reflux for 4 hours, after cooling, wash with a large amount of ethanol three times After that, it was dried under reduced pressure at 100°C for 3 hours, and the silane ...

Embodiment 2

[0019] Catalyst preparation method is as follows:

[0020] (1) Molecular sieves are obtained as catalyst supports by surface modification of 13X molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (hydrochloric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:2 to improve Molecular sieve surface properties; then use transition metal ion (copper nitrate) solution to carry out equal volume impregnation to the pretreated molecular sieve to realize ion exchange, and the transition metal ion concentration is 0.2mol / L.

[0021] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it into the reactor after cooling, and add 60mL of toluene and 0.3mL of silane coupling agent to it, reflux for 8 hours, after cooling, wash with a large amount of ethanol three times Afterwards, dry under reduced pressure at 100°C for 3 hours, and the silane couplin...

Embodiment 3

[0026] Catalyst preparation method is as follows:

[0027] (1) Molecular sieves are obtained as catalyst supports by surface modification of ZSM-5 molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (hydrochloric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:1. To improve the surface properties of the molecular sieve; then use the solution of transition metal ions (cobalt nitrate) to impregnate the pretreated molecular sieve with equal volume to realize ion exchange, and the concentration of the rare earth metal ion or transition metal ion is 0.1mol / L.

[0028] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it into the reactor after cooling, and add 60mL of toluene and 0.4mL of silane coupling agent to it, reflux for 6h, after cooling, wash with a large amount of ethanol three times Afterwards, dry under reduced pressure at 100...

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Abstract

The invention relates to a catalyst used in the field of catalytic oxidation deep desulfurization of fuel oil and preparation of ultra-clean fuel oil. The modified molecular sieve is used to load heteropolyacid to prepare a loaded desulfurization catalyst. While having high activity and high selectivity, the reusability of the heteropoly acid is improved. On the one hand, the present invention uses strong acid and strong oxidant to pretreat the molecular sieve, and then uses ion exchange to modify the molecular sieve, so that the local position in the molecular sieve channel increases the electrostatic field strength, so that the sulfide molecules are polarized so that they are easily adsorbed and then catalyzed; On the one hand, the choice of heteropolyacid as the main catalyst also greatly improves the catalytic performance of molecular sieves on organic sulfides. Because the catalyst is used in production, the desulfurization rate is high, and the production cost and operation cost are greatly reduced.

Description

technical field [0001] The invention relates to a catalyst used for catalytic oxidation deep desulfurization of fuel oil to prepare ultra-clean fuel oil. Background technique [0002] At present, fuel oil hydrodesulfurization technology is widely used in industry, which can remove sulfides such as mercaptans, sulfides, and thiophenes. However, the operating conditions of deep desulfurization are relatively harsh, and the hydrogen consumption is large, and the operating equipment is expensive, especially diphenyl Hydrodesulfurization of thiophene sulfides is more difficult. Non-hydrodesulfurization operating conditions are relatively mild, process equipment investment and operating costs are low, and environmental pollution is less, especially the catalytic oxidation desulfurization technology has a good removal effect on difficult-to-treat benzothiophene and its derivatives, and has been favored by researchers at home and abroad. widespread attention. The key to catalytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16B01J29/48B01J37/30C10G45/12
CPCB01J27/188B01J27/19B01J29/163B01J29/48B01J37/30B01J2229/14B01J2229/18B01J2229/32B01J2229/37C10G45/12C10G2300/207
Inventor 朱丽君吕昕峰郝昭夏道宏周玉路项玉芝
Owner 山东法恩泰科技工程有限公司
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