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A kind of selective nickel-based hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst, catalyst technology, applied in the direction of selective hydrorefining, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem that diolefins do not have hydrogenation selectivity and the like , to achieve the effect of good hydrogenation activity, strong hydrogenation stability and thermal stability, and strong poison ability

Active Publication Date: 2016-04-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can be used for hydrofining of middle and low distillate oils. It can hydrogenate saturated monoolefins to the greatest extent while hydrodesulfurizing. It can meet the requirements of oil products with variable sulfur content and high space velocity, but it has no effect on diolefins. Hydrogenation selectivity

Method used

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  • A kind of selective nickel-based hydrogenation catalyst and preparation method thereof
  • A kind of selective nickel-based hydrogenation catalyst and preparation method thereof
  • A kind of selective nickel-based hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 20.7g of citric acid in water at 30°C, add 10.4g of lithium carbonate to prepare 60ml of aqueous solution, spray 300g of pseudo-boehmite alumina powder with this solution, knead while spraying, then add 80ml of water, 5ml of nitric acid ( 60% content) and 9.7g silica sol (containing 40% silica), continue to knead and extrude, dry at 120°C for 4 hours in the air, and roast at 980°C for 4 hours to obtain modified Al 2 o 3 carrier.

[0038] At 30°C, 86.4g of nickel nitrate, 7.2g of sodium stannate, 17.1g of zinc nitrate, 14.3g of copper nitrate, and 3.3g of ammonium molybdate were made into 90ml of aqueous solution, then 6.5g of tetraethylene glycol was added, and then immersed in 100g On the modified carrier, aged for 6 hours, dried at 120°C for 2 hours in air, and calcined at 350°C for 4 hours to prepare catalyst C-1. The composition of the catalyst is shown in Table 2.

Embodiment 2

[0044] Dissolve 42.6g of citric acid in water at 35°C, add 18.7g of lithium carbonate to prepare 60ml of aqueous solution, spray 300g of pseudo-boehmite alumina powder with this solution, knead while spraying, then add 80ml of water, 5ml of nitric acid ( Content 60%) and 9.7g phosphoric acid (content 85%), continue to knead and extrude, dry at 130°C for 2 hours in the air, and roast at 1050°C for 4 hours to obtain modified Al 2 o 3 carrier.

[0045] At 30°C, 80.7g of nickel nitrate, 6.6g of sodium stannate, 9.8g of zinc nitrate, 4.9g of ammonium molybdate, and 4.5g of ammonium tungstate were made into 90ml of aqueous solution, then 10.0g of triethylene glycol was added, and then immersed in 100g of modified carrier was aged for 6h, dried in air at 120°C for 3h, and calcined at 500°C for 6h to prepare catalyst C-2. The catalyst composition is shown in Table 2.

Embodiment 3

[0051] Dissolve 3.0g of citric acid and 1.3g of oxalic acid in water at 40°C, add 5.3g of potassium carbonate to prepare a 60ml aqueous solution, spray 300g of pseudo-boehmite alumina powder with this solution, knead while spraying, and then add 80ml of water and 5ml of nitric acid (content 60%) and 24.9g silica sol (containing 40% silica), continue to knead and extrude into strips, dry at 120°C for 3h in the air, and roast at 1100°C for 4h to obtain modified Al 2 o 3 carrier.

[0052] At 40°C, 79.4g of nickel nitrate, 5.7g of sodium stannate, 5.6g of zinc nitrate, 3.9g of copper nitrate, 1.5g of ammonium molybdate, and 1.4g of ammonium tungstate were prepared into 90ml of aqueous solution, and then 6.9g of triethylene glycol was added , and then impregnated on 100g of modified carrier, aged for 6h, dried in air at 120°C for 3h, and calcined at 550°C for 3h to prepare catalyst C-3. The catalyst composition is shown in Table 2.

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Abstract

The invention relates to a selective nickel-based hydrogenation catalyst and a preparation method thereof. With an aluminum oxide as a carrier, the selective nickel-based hydrogenation catalyst comprises the following components in percentage by weight: 14-19 percent of nickel oxide, 2-5 percent of tin oxide, 0.1-8 percent of alkali metal lithium oxide and / or potassium oxide, 0.5-8 percent of copper oxide and / or zinc oxide, 0.3-8 percent of molybdenum oxide and / or tungsten oxide and 0-8 percent of silicon oxide and / or phosphorus oxide. The aluminum oxide carrier is prepared by spraying a complex solution of an alkali metal Li and / or K on an aluminum hydroxide powder body, and thus the hydrogenation stability of the catalyst can be further improved. Due to introduction of auxiliary components such as Sn in the catalyst, the performance such as heat stability, diene hydrogenation selectivity and sulphur and arsenic resistance of the catalyst can be improved.

Description

technical field [0001] The invention relates to a selective nickel-based hydrogenation catalyst, which is especially suitable for one-stage selective hydrogenation process of pyrolysis gasoline, especially suitable for one-stage selective hydrogenation process of whole-distillation pyrolysis gasoline. Background technique [0002] Pyrolysis gasoline is an important by-product of the ethylene industry, and its output accounts for about 50% to 80% of the ethylene production capacity, of which the aromatic content is as high as 60%. It can be used as a raw material for aromatics extraction after two-stage hydrogenation, or only After one-stage hydrogenation, it can be used as an excellent gasoline blending oil. The one-stage hydrogenation is mainly to selectively hydrogenate diolefins and alkenyl aromatics. In recent years, with the variability of domestic ethylene cracking raw materials and the differences in cracking equipment and methods, some manufacturers have deteriorated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01J23/888C10G45/38
Inventor 梁顺琴孙利民吴杰王廷海王宗宝康宏敏钱颖向永生马好文吕龙刚常晓昕郑云弟蒋彩兰潘曦竹
Owner PETROCHINA CO LTD
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