Nickel catalyst with composite pore structure used for selective hydrogenation

A nickel catalyst and composite pore technology, which is applied in refining to remove heteroatoms, etc., can solve problems such as poor stability, low gel capacity, and poor anti-interference ability, and achieve good anti-interference and good low-temperature activity.

Active Publication Date: 2008-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there are technical problems in the prior art that the catalyst has low low-temperature activity,

Method used

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  • Nickel catalyst with composite pore structure used for selective hydrogenation
  • Nickel catalyst with composite pore structure used for selective hydrogenation
  • Nickel catalyst with composite pore structure used for selective hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing 300 grams of pseudo-boehmite, 150 grams of α-alumina, and 9 grams of scallop powder, mix, then add 25 grams of polyvinyl alcohol-containing solution (mass concentration is 5%), 4.0 grams of nitric acid, and the concentration is 85% 1.8 grams of phosphoric acid, 1.5 grams of potassium nitrate, and 360 milliliters of aqueous solution of 2 grams of magnesium nitrate were extruded into clover with a diameter of 2.5 mm. The wet strip was dried at 120° C. for 4 hours and then roasted at 1150° C. for 2 hours to obtain carrier Z1. Weigh 2.5 grams of ammonium molybdate, 1.0 grams of lanthanum nitrate, 4.0 grams of zirconium nitrate, add 130 grams of water, and mix with 50 grams of nickel solution with a concentration of 14% to prepare an impregnation solution. The carrier was impregnated in an equal amount in the impregnation solution, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to obtain Ni-based catalyst C1, so that the final Ni content was 10....

Embodiment 2

[0017]Carrier Z2 was used, and the preparation method of the carrier was the same as in Example 1, and the composition of the carrier was shown in Table 1. Weigh 10.0 grams of ammonium molybdate, 5.0 grams of ammonium tungstate, 3.5 grams of lanthanum nitrate, 3.0 grams of cerium nitrate, 4.5 grams of titanium chloride, 2.0 grams of potassium borohydride, 3.0 grams of potassium fluoride, add 30 grams of water, and the concentration is Mix 150 grams of 14% nickel solution to make the dipping solution. Ni-based catalyst C2 was prepared with the same operating steps and conditions as in Example 1, so that the final Ni content was 30.0% by weight of the carrier alumina. The catalyst composition, specific surface area, pore volume, and pore size distribution are shown in Table 1, and the content of each component is based on the weight of the carrier alumina.

Embodiment 3

[0019] Take by weighing 300 grams of pseudo-boehmite, 45 grams of diatomite, and 9 grams of scallop powder, mix, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), 3.5 grams of nitric acid, and 1.0 grams of calcium nitrate. 360 milliliters of aqueous solution was extruded into a clover with a diameter of 2.5 mm, and the wet strip was dried at 50° C. for 24 hours and then calcined at 750° C. for 4 hours to obtain carrier Z3. Weigh 25 grams of ammonium molybdate, 3.0 grams of cerium nitrate, 0.5 grams of zirconium nitrate, add 80 grams of water, and mix with 100 grams of nickel solution with a concentration of 14% to form an impregnation solution. Ni-based catalyst C3 was prepared with the same operation steps and conditions as in Example 1, so that the final Ni content was 20.0% by weight of the carrier alumina. The catalyst composition, specific surface area, pore volume, and pore size distribution are shown in Table 1, and the content of each componen...

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Abstract

The invention relates to a nickel catalyst used for selective hydrogenation and provided with a complex hole structure and mainly solves the technical problems that the catalyst has low low-temperature activity, bad anti-jamming ability, low sol ability, bad stability and bad free water resistant performance existing in the prior art. The invention comprises the following compositions based on the weight percentage: (a) 5.0 percent to 40.0 percent of metal nickel or oxides of the metal nickel; (b) 0.01 percent to 20.0 percent of at least one element chosen from molybdenum or tungsten or the oxide thereof; (c) 0.01 percent to 10.0 percent of at least one element chosen from rare earth or the oxide thereof; (d) 0.01 percent to 2.0 percent of at least one element chosen from IA or IIA in Periodic Table of Elements or the oxide thereof; (e) 0 to 15.0 percent of at least one element chosen from silicon, phosphor, boron or fluorin or the oxide thereof; (f) 0 to 10.0 percent of at least one element chosen from IVB in Periodic Table of Elements or the oxide thereof; (g) the remaining alumina carrier, wherein, the technical proposal that the total pore volume of the carrier is between 0.5 and 1.2ml/g, the pore volume the pore diameter of which is less than 30 nanos accounts for 5 to 65 percent of the total pore volume, the pore volume the pore diameter of which is between 30 and 60 nanos accounts for 20 to 80 percent of the total pore volume, the pore volume the pore diameter of which is more than 60 nanos accounts for 20 to 50 percent of the total pore volume, better solves the problems and can be used in the industrial production of selective hydrogenation of cracking gasolilne.

Description

technical field [0001] The present invention relates to a nickel catalyst with composite pore structure for selective hydrogenation, in particular to a kind of full-fraction pyrolysis gasoline or C6-C8 hydrocarbon compound middle distillate for C5 hydrocarbons ~ dry point of 204 ° C Nickel Catalyst for Hydrogenation of Pyrolysis Gasoline. Background technique [0002] Utilization of pyrolysis gasoline in ethylene plant is one of the main ways to improve the comprehensive economic benefits of the plant. Due to the complex composition and poor thermal stability of pyrolysis gasoline, it is usually used for the extraction of aromatics after the first stage of selective hydrogenation to remove dienes and styrene, and the second stage of hydrodesulfurization. At present, the catalysts for selective hydrogenation of pyrolysis gasoline in industry are mainly Pd-based or Ni-based catalysts, and the middle distillate (C 6 ~C 8 hydrocarbon compound fraction) hydrogenation or whole ...

Claims

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Application Information

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IPC IPC(8): C10G45/08
Inventor 刘仲能谢在库吴晓玲江兴华侯闽渤
Owner CHINA PETROLEUM & CHEM CORP
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