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Nickel catalyst for selective hydrogenation

A nickel catalyst and selective technology, applied in the field of nickel catalyst for selective hydrogenation, can solve the problems of low-temperature activity and poor stability of the catalyst, and achieve good low-temperature activity

Active Publication Date: 2008-03-26
SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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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 and poor stability, and a new nickel catalyst for selective hydrogenation is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 300 grams of pseudo-boehmite, 150 grams of alpha alumina, 9 grams of sesame powder, mix, and then add 25 grams of polyvinyl alcohol solution (mass concentration of 5%), 4.0 grams of nitric acid, and 85% concentration 360 ml of an aqueous solution of 1.8 g of phosphoric acid, 1.5 g of potassium nitrate, and 2 g of magnesium nitrate were extruded into φ2.5 mm clover. The wet bar was dried at 120°C for 4 hours and then calcined at 1150°C for 2 hours to obtain carrier Z1. Weigh 2.5 grams of ammonium molybdate, 1.0 grams of lanthanum nitrate, and 4.0 grams of zirconium nitrate, add 130 grams of water, and mix with 50 grams of 14% nickel solution to prepare an impregnation solution. The carrier was impregnated in the same amount in the impregnation solution, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to prepare a Ni-based catalyst C1, so that the final Ni content was 10.0% of the weight of the carrier alumina. The composition of the catalyst is shown in Ta...

Embodiment 2

[0017] The carrier Z2 is used, and the carrier preparation method is the same as in Example 1, and the carrier composition is 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 150 grams of 14% nickel solution is mixed to form an impregnation solution. The 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% of the weight of the carrier alumina. The composition of the catalyst is shown in Table 1, and the content of each component is based on the weight of the carrier alumina.

Embodiment 3

[0019] Weigh 300 grams of pseudo-boehmite, 45 grams of diatomaceous earth, 9 grams of sesbania powder, mix, and then add 25 grams of polyvinyl alcohol solution (mass concentration of 5%), 3.5 grams of nitric acid, and 1.0 grams of calcium nitrate. 360 ml of the aqueous solution was extruded into a φ2.5 mm clover, the wet bar 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 14% nickel solution to prepare an impregnation solution. The Ni-based catalyst C3 was prepared with the same operating steps and conditions as in Example 1, so that the final Ni content was 20.0% of the weight of the carrier alumina. The composition of the catalyst is shown in Table 1, and the content of each component is based on the weight of the carrier alumina.

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Abstract

The present invention relates to a nickel catalyst for selective hydrogenation. The catalyst composition includes the following components: (by wt%) (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), 0.01-10.0% of at least one element selected from rare earth elements or its oxide; (d), 0.01-2.0% of at least one element selected from IA or IIA of periodic table of chemical elements or its oxide; (e), 0-15.0% of at least one element selected from Si, P, B or F or its oxide; (f), 0-10.0% of at least one element selected from IVB of periodic table of chemical elements or its oxide; and (g), the rest is aluminium oxide. Said catalyst can be used for pyrolysis gasoline hydrotreating production.

Description

Technical field [0001] The present invention relates to a nickel catalyst for selective hydrogenation, in particular to a pyrolysis gasoline hydrogenation for full-cut pyrolysis gasoline of hydrocarbon compounds with a dry point of 204°C or C6-C8 hydrocarbon compounds. Nickel catalyst. Background technique [0002] The utilization of pyrolysis gasoline in the 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, usually, the first stage of selective hydrogenation to remove diolefins and styrene, and the second stage of hydrodesulfurization are mainly used for aromatics extraction. At present, catalysts for selective hydrogenation of pyrolysis gasoline in industry are mainly Pd or Ni catalysts, middle distillate (C 6 ~C 8 Hydrocarbon compound fraction) hydrogenation or full fraction (C 5 Hydrocarbon ~ hydrocarbon compound fraction with a dry point of 204°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199B01J23/883B01J23/887C10G47/12
Inventor 刘仲能吴晓玲侯闽渤宗弘元江兴华
Owner SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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