A surface-modified nickel-based sulfur-resistant hydrogenation catalyst and its preparation method

A hydrogenation catalyst and surface modification technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reducing catalyst activity, affecting the service cycle of catalysts, etc., to achieve long protection period, The effect of active stabilization, strong mechanical strength and sulfur resistance

Active Publication Date: 2019-05-17
新疆佳宇恒能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because petroleum fractions contain impurities such as sulfur, nitrogen, oxygen, and metals, the activity of the catalyst gradually decreases, and deactivation in a short period of time affects the service life of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 2.4g of metaphosphoric acid and 14.1g of citric acid in 40ml of deionized water, add water to 100ml, and stir to dissolve at 20°C. Dissolve 1.8g of zinc powder in the above solution, reflux at 152°C for 3h to dissolve. Filter to obtain 100ml of clear and stable co-immersion solution. Immerse 97.3g of the pretreated nickel-based catalyst in equal volume in the above impregnation slurry under ultrasonic conditions. The temperature of the load liquid is 150°C. After taking it out, cool it to room temperature, and dehydrate it with a centrifuge at a speed of 180 rpm, and the dehydration time is 15 minutes. ; to form a uniform film on the catalyst surface;

[0027] After the dehydration is completed, place the catalyst at a humidity of 80%, and age it in a constant temperature and humidity box at a temperature of 50°C for 8 hours, take it out, and dry it at a temperature of 120°C, and finally place the catalyst loaded with a shielding layer in a muffle furnace at a...

Embodiment 2

[0029] Dissolve 3.8g of metaphosphoric acid and 11.3g of citric acid in 40ml of deionized water, add water to 100ml, dissolve 2.8g of zinc powder in the above solution, and reflux at 148°C for 3.5h to fully dissolve. Filter to obtain 100ml of clear and stable co-immersion solution. Immerse 95.7g of the pretreated nickel-based catalyst in the above impregnation slurry in equal volume under ultrasonic conditions. The temperature of the load liquid is 146°C. After taking it out, cool it to room temperature and dehydrate it with a centrifuge at a speed of 180 rpm for 15 minutes. . To form a uniform film on the surface of the catalyst;

[0030] After the dehydration is completed, place the catalyst at a humidity of 80%, and age it in a constant temperature and humidity box at a temperature of 50°C for 8 hours, take it out, and dry it at a temperature of 120°C, and finally place the catalyst loaded with a shielding layer in a muffle furnace at a temperature of 550°C Calcined for 5...

Embodiment 3

[0032] Dissolve 4.8g of metaphosphoric acid and 12.3g of citric acid in 40ml of deionized water, add water to 100ml, dissolve 2.8g of zinc powder and 2.3g of copper powder in the above solution, and reflux at 140°C for 5 hours to fully dissolve. Filter to obtain 100ml of clear and stable co-immersion solution. 94g of the pretreated nickel-based catalyst was impregnated into the impregnation slurry in equal volume under ultrasonic conditions. The temperature of the load liquid was 140°C. After taking it out, it was cooled to room temperature, and dehydrated with a centrifuge at a speed of 180 rpm for 15 minutes. To form a uniform film on the surface of the catalyst;

[0033] After the dehydration is completed, place the catalyst in a constant temperature and humidity box with a humidity of 78% and a temperature of 48°C for 9 hours, take it out, and dry it at a temperature of 125°C, and finally place the catalyst loaded with a shielding layer in a muffle furnace at a temperature...

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PUM

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Abstract

The invention discloses a surface modified nickel based sulfur resistant hydrogenation catalyst and a preparation method thereof, and belongs to the technical field of nickel-based catalysts. The catalyst is characterized by comprising an inorganic oxide carrier with a surface and holes in preset sizes, and a complex shielding layer suitable for the interaction with the surface, with the size being in interaction with the carrier and active metal. By applying the shielding layer onto the surfaces and the holes of the carrier and active components, the shielding layer complex is converted into metal, metal oxide and a mixture of the metal and the metal oxide through calcinations, and the catalyst is prepared through hydrogen reduction. The catalyst greatly improves the activity in shielding metal components contained in the catalyst, reduces the content of shielding metal, and guarantees the quantity of active centers in catalyst metal.

Description

technical field [0001] A surface-modified nickel-based sulfur-resistant hydrogenation catalyst and a preparation method thereof belong to the technical field of nickel-based catalysts. Background technique [0002] Petroleum fractions contain impurities such as sulfur, nitrogen, oxygen, and metals. The existence of these impurities will not only affect the properties of the oil, but also release harmful gases that pollute the environment during use and reduce the activity and life of the catalyst. In the hydroprocessing process of petroleum hydrocarbons as raw materials, the raw materials are reacted with hydrogen under high temperature and high pressure conditions to remove harmful substances in the raw materials, such as organic sulfides, organic nitrogen compounds, and organometallic compounds. [0003] Sulfur is one of the most important poisons of reduced catalysts, and petroleum raw materials contain different amounts of sulfur. With the popularization of hydrogenatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185C10G45/06
CPCB01J27/1853C10G45/06C10G2300/202
Inventor 曾佑富齐梅山张健
Owner 新疆佳宇恒能源科技有限公司
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