A kind of regenerable catalyst for removing organic chlorine and preparation method thereof

A catalyst and organochlorine technology, applied in chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve problems such as low dynamic adsorption rate, limited adsorption capacity, and short service life

Active Publication Date: 2020-08-28
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although 13X molecular sieve has a certain removal effect on organic chlorine, its total adso

Method used

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  • A kind of regenerable catalyst for removing organic chlorine and preparation method thereof
  • A kind of regenerable catalyst for removing organic chlorine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 197g aluminum sol (Al 2 o 3 The content of 22%), 33.3g silica sol (SiO 2 content of 30%), 38.1g of nickel nitrate, 2.5g of tetraethylammonium bromide and 300g of water, stirred for 6 hours, and mixed evenly to obtain the initial sol-gel mixture. Crystallize for 8 hours. The pH value of the crystal slurry was adjusted to neutral with 0.5mol / L urea, and 4.28g ammonium molybdate, 59.7g copper nitrate and 6.3g cerium nitrate were added, and the ion exchange reaction was carried out for 8h. After the reaction is completed, the above slurry is added to a flocculant for precipitation, filtered, washed, dried, extruded, and the filtered liquid is reused for the next reaction. After drying at 150°C for 2 hours and calcining at 500°C for 6 hours, a regenerable adsorption dechlorination catalyst Cat1 was obtained.

Embodiment 2

[0021] 179g of aluminum sol, 10g of silica sol, 44.6g of magnesium chloride, 15.1g of nickel nitrate, 2.5g of cetyltrimethylammonium bromide and 300g of water were stirred for 10 hours and mixed evenly to obtain the initial sol-gel mixture, and the initial sol-gel The glue material was moved into a synthesis kettle and sealed, and crystallized at 150 for 8 hours. The pH value of the crystal slurry was adjusted to neutral with 0.5mol / L urea, and 6.26g of ammonium molybdate, 59.7g of copper nitrate and 6.3g of cerium nitrate were added, and the ion exchange reaction was carried out for 28h. After the reaction is completed, the above slurry is added to a flocculant for precipitation, filtered, washed, dried, extruded, and the filtered liquid is reused for the next reaction. After drying at 120°C for 4 hours and calcining at 500°C for 6 hours, a regenerable adsorption dechlorination catalyst Cat2 was obtained.

Embodiment 3

[0023] 192.5g of aluminum sol, 23g of silica sol, 33g of magnesium chloride, 26.6g of nickel nitrate, 2.5g of tetraethylammonium bromide and 300g of water were stirred for 6 hours and mixed evenly to obtain the initial sol-gel mixture, and the initial sol-gel material was transferred to the synthetic The kettle was sealed and crystallized at 220°C for 20 hours. Use 0.5mol / L urea to adjust the pH value of the crystal slurry to neutral, add 4.28g ammonium molybdate, 48.7g copper nitrate and 5.1g cerium nitrate, and carry out ion exchange reaction for 20h. After the reaction is completed, the above slurry is added to a flocculant for precipitation, filtered, washed, dried, extruded, and the filtered liquid is reused for the next reaction. After drying at 120°C for 3 hours and calcining at 600°C for 5 hours, a regenerable adsorption dechlorination catalyst Cat3 was obtained.

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Abstract

The invention discloses a reproducible catalyst for organochlorine removal and a preparation method of the reproducible catalyst. According to the catalyst, composite oxide synthesized from an Al source, a Si source and an Mg source is taken as a supporter, and Ni, Mo, Cu and Ce are taken as active components. In percentage by mass, the catalyst contains 6.2%-15.6% of NiO, 16.1%-25.4% of CuO, 1.7%-4.6% of MoO3, 1.5%-2.5% of CeO2 and the balance of the supporter. The composite oxide is taken as the supporter of the catalyst, active metal can be dispersed better, and the catalyst has an orderedporous structure, specific pore size and higher pore volume. Organochlorine can be removed effectively, follow-up devices are prevented from being corroded by inorganic chlorine, and quality of oils is improved. Meanwhile, the catalyst is reproducible continuously, startup and shutdown time is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to a reproducible catalyst for removing organic chlorides in chlorinated naphtha and a preparation method thereof, belonging to the field of oil refining. Background technique [0002] In the late stage of oilfield exploitation, in order to increase the output of the oilfield, some additives containing organic chlorides will be used to increase the oil recovery rate, resulting in high chloride content in some crude oil, and the chlorine-containing compounds are mainly enriched in naphtha. Chlorides in naphtha are mainly chlorinated alkanes, such as chloroform, dichloromethane, trichloroethane, etc. The current crude oil desalting process can only remove the inorganic chlorides in the crude oil, but cannot remove the organic chlorides. Naphtha is used as a raw material for ethylene production and catalytic reforming. The organic chlorides in naphtha do not cause corrosion to equipment, but during the pre-hydrogenation process, org...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J35/10C10G31/00
CPCB01J23/002B01J23/8871B01J23/8872B01J35/1019B01J35/1023B01J35/1038B01J35/1042B01J35/1061B01J2523/00C10G31/00C10G2300/201B01J2523/17B01J2523/31B01J2523/3712B01J2523/41B01J2523/68B01J2523/847B01J2523/22
Inventor 夏大寒张先茂王泽吴阳春陈宗杰王栋斌周正瞿玖王瑜王国兴
Owner WUHAN KELIN FINE CHEM
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