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Pyrolysis gasoline nickel system selective hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and pyrolysis gasoline technology, applied in the field of pyrolysis gasoline nickel-based selective hydrogenation catalyst and its preparation, can solve the problems of frequent regeneration, small pore volume, large pore volume, etc., and achieve good arsenic capacity and good selectivity Effect

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. The preparation process is cumbersome and the cost is high
[0011] 2. The catalyst has single channel, wide distribution, small pore volume and low reactivity
[0012] 3. Palladium-based catalysts have poor anti-arsenic and anti-colloid capabilities and poor stability, which makes the hydrogenation palladium-based catalysts have a short operating cycle and frequent regeneration
[0013] 4. A full-distillation pyrolysis gasoline selective hydrogenation catalyst with large pore volume, high specific surface area, good reactivity, high hydrogenation reaction selectivity, good stability, excellent arsenic capacity, and anti-gelation ability has not yet been reported

Method used

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  • Pyrolysis gasoline nickel system selective hydrogenation catalyst and preparation method thereof
  • Pyrolysis gasoline nickel system selective hydrogenation catalyst and preparation method thereof
  • Pyrolysis gasoline nickel system selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Weigh 4.0g of polyethylene glycol and 3.6g of maltose and dissolve them in 100mL of water, then add 37.6g of aluminum nitrate and stir in a 60°C water bath for 40min to obtain solution 1, weigh 14.0g of basic nickel carbonate, 1.65g of ammonium molybdate, 0.8 Dissolve g lanthanum nitrate and 4.0 g ammonium carbonate in 10 mL ammonia water to obtain solution 2, slowly add solution 2 to solution 1 to obtain solution 3, then adjust solution 3 to pH 10.5 with ammonia water to obtain solution 4, weigh 9.0 g starch and add Put the solution 4 into ultrasonic waves for 20 minutes, take out the precipitate, wash it, and dry it at 100°C for 24 hours. Raise the temperature to 440°C at a speed of 2°C / min, roast at a constant temperature for 1.5h, and then raise the speed to 550°C for 2.5h at a speed of 2°C / min. The obtained catalyst powder was mixed with 0.5 g of scallop powder and 0.6 g of citric acid, and extruded to obtain catalyst A. The physical and chemical properties and co...

Embodiment 2

[0064] Weigh 4.0g of polyethylene glycol and dissolve it in 100mL of water, then add 37.6g of aluminum nitrate and stir in a 60°C water bath for 40min to obtain solution 1, weigh 11.7g of basic nickel carbonate, 1.5g of ammonium molybdate, 1.18g of lanthanum nitrate, Dissolve 4.0 g of ammonium carbonate in 10 mL of ammonia water to obtain solution 2, slowly add solution 2 to solution 1 to obtain solution 3, then adjust solution 3 with ammonia water to a pH value of 10.0 to obtain solution 4, weigh 9.0 g of starch and add it to solution 4 Into the ultrasonic wave for 18 minutes, the precipitate was taken out and washed, and dried at 100°C for 12 hours. Raise the temperature to 440°C at a speed of 2°C / min, roast at a constant temperature for 1.5h, and then raise the speed to 550°C for 2.5h at a speed of 2°C / min. The obtained catalyst powder was mixed with 0.5 g of scallop powder and 0.6 g of citric acid, and extruded to obtain catalyst B. The physical and chemical properties an...

Embodiment 3

[0066] Weigh 4.0g of ethylene glycol and dissolve it in 100mL of water, then add 37.6g of aluminum nitrate and stir in a 60°C water bath for 40min to obtain solution 1, weigh 14.0g of basic nickel carbonate, 1.5g of ammonium molybdate, 2.2g of lanthanum nitrate, 4.0 Dissolve 1 g of ammonium carbonate in 10 mL of ammonia water to obtain solution 2, slowly add solution 2 to solution 1 to obtain solution 3, then adjust solution 3 to pH 8.0 with ammonia water to obtain solution 4, weigh 9.5 g of starch and add it to solution 4 Ultrasonic for 15 minutes, the precipitate was taken out and washed, and dried at 100°C for 24 hours. Raise the temperature to 400°C at a speed of 2°C / min, roast at a constant temperature for 1.5h, and then raise the speed to 650°C for 2.5h at a speed of 2°C / min. The obtained catalyst powder was mixed with 0.5 g of scallop powder and 0.6 g of citric acid, and extruded to obtain catalyst C. The physical and chemical properties and composition of catalyst C a...

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Abstract

The invention provides a pyrolysis gasoline nickel system selective hydrogenation catalyst and a preparation method of the pyrolysis gasoline nickel system selective hydrogenation catalyst and belongs to a catalyst containing metal or metal oxide or hydroxide. The pyrolysis gasoline nickel system selective hydrogenation catalyst is characterized by being provided with a mesopore-macropore or double-mesopore compound pore channel, taking aluminum oxide as a carrier, taking nickel as a main active component, taking molybdenum as an auxiliary active component and taking the metal oxide as an auxiliary agent; the pyrolysis gasoline nickel system selective hydrogenation catalyst is composed of following components in parts by weight: 15-19 parts of nickel oxide, 6.5-20 parts of molybdenum oxide, 2.2-4.5 parts of the auxiliary agent and the balance of the aluminum oxide; the auxiliary agent is one or the combination of more than two of potassium oxide, magnesium oxide and lanthanum oxide. The invention provides the pyrolysis gasoline nickel system selective hydrogenation catalyst which is large in pore capacity and high in specific surface, has good reaction activity, high hydrogenation reaction selectivity, good stability, good arsenic dissolving and glue resisting capabilities and is provided with the compound pore channel, and the preparation method of the pyrolysis gasoline nickel system selective hydrogenation catalyst. When the catalyst is used for selectively hydrogenating full-fraction pyrolysis gasoline, the average diene hydrogenation rate is 99%.

Description

technical field [0001] The invention relates to a cracking gasoline nickel-based selective hydrogenation catalyst and a preparation method thereof. Catalysts containing metals or metal oxides or hydroxides. Background technique [0002] Pyrolysis gasoline is a by-product of high-temperature thermal cracking of petroleum hydrocarbons, and it is the second largest product after ethylene in ethylene plants. Its utilization is one of the main ways to improve the comprehensive economic benefits of plants. Pyrolysis gasoline contains unsaturated and easily oxidized hydrocarbons, such as dienes, alkenyl aromatics, etc. These compounds are prone to polymerization to generate colloids, but lead to pyrolysis gasoline can not be used directly. In industry, it is usually less than C in pyrolysis gasoline 5 , higher than C 9 After the fraction cut off, the middle distillate C 6 ~C 8 It is processed by two-stage hydrogenation method. One-stage hydrogenation removes highly unsaturat...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J35/10C10G45/38
Inventor 薛红霞王昊姜建波白志敏赵庆鲁齐焕东江秀玲梁卫忠余汉涛
Owner CHINA PETROLEUM & CHEM CORP
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