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Macropore capacity ultra-fine nickel catalyst for selective hydrogenation

A nickel catalyst, a technology of large pore volume, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low low temperature activity and poor stability of catalysts, Achieving the effect of good low temperature activity

Active Publication Date: 2009-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the technical problem of low-temperature activity and poor stability of the catalyst in the prior art, and a new large-pore-volume ultra-fine nickel catalyst for selective hydrogenation is provided

Method used

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  • Macropore capacity ultra-fine nickel catalyst for selective hydrogenation
  • Macropore capacity ultra-fine nickel catalyst for selective hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 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

[0019] 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 nickel grain size are shown in Table 1, and the contents of each component are based on the weight of the carrier alumina.

Embodiment 3

[0021] Take by weighing 300 grams of pseudo-boehmite, 45 grams of diatomaceous earth, and 9 grams of turmeric powder, mix, and 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 nickel grain size are shown in Table 1, and the contents of eac...

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Abstract

The invention relates to a large pore volume ultrafine nickel catalyst for selective hydrogenation, which mainly solves the technical problems of low-temperature activity and poor stability of the catalyst in the prior art. The present invention comprises the following components by weight percentage: (a) 5.0-40.0% of metal nickel or its oxide; (b) 0.01-20.0% of at least one element selected from molybdenum or tungsten or its Oxide; (c) 0.01 to 10.0% of at least one element selected from rare earths or its oxide; (d) 0.01 to 2.0% of at least one element selected from I A or II A in the periodic table or Its oxide; (e) 0-15.0% of at least one element selected from silicon, phosphorus, boron or fluorine or its oxide; (f) 0-10.0% of at least one element selected from IVB in the periodic table An element or its oxide; (g) the balance of the carrier alumina. The technical scheme in which the nickel grain size in the catalyst is 2-4.5 nanometers solves this problem well, and can be used in the industrial production of selective hydrogenation of pyrolysis gasoline.

Description

technical field [0001] The present invention relates to a large pore volume ultra-fine nickel catalyst for selective hydrogenation, in particular to a kind of cracking of gasoline or middle distillate of C6-C8 hydrocarbon compounds which is used for C5 hydrocarbons to a dry point of 204°C Nickel catalyst for gasoline hydrogenation. 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 fractio...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/12B01J23/883C10G45/60
Inventor 刘仲能吴晓玲江兴华
Owner CHINA PETROLEUM & CHEM CORP
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