Catalyst for producing cyclopentene from cyclopentadiene, preparation method and application thereof

A technology for preparing cyclopentene and cyclopentadiene from cyclopentadiene is applied in the field of catalyst for preparing cyclopentene from cyclopentadiene and the field of preparation thereof, and can solve the problems of insufficient selectivity and low-temperature reaction activity, high mechanical strength ratio Surface area, easy spontaneous combustion and other problems, to achieve excellent selective hydrogenation effect of cyclopentadiene, high selectivity and low temperature activity, and mild reaction conditions

Active Publication Date: 2022-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Raney nickel is a skeleton Ni-Al alloy catalyst, which is mostly used in slurry bed reactions. It is often dispersed in the raw material in the form of powder to violently disturb the contact reaction. And the separation of the product after the reaction, and under the condition of ensuring high cyclopentene selectivity, the hydrogenation activity of cyclopentadiene is low, and the conversion rate of raw materials is usually less than 90%
[0008] The Ni catalyst supported by the carrier is very suitable for the fixed bed reaction by virtue of the large particles of the carrier, high mechanical strength, large pore volume and large specific surface area, so there is no problem that the catalyst and the product are not easy to separate, and it can be used very well Simplify the hydrogenation process, but there are few reports on related technologies and the use effect is poor
In addition, although the supported Ni catalyst has many advantages compared with the more typical supported Pd and Raney-Ni catalysts, it still has insufficient selectivity and low-temperature reactivity during the selective hydrogenation of cyclopentadiene, and the stability is not good enough. The problem

Method used

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  • Catalyst for producing cyclopentene from cyclopentadiene, preparation method and application thereof
  • Catalyst for producing cyclopentene from cyclopentadiene, preparation method and application thereof
  • Catalyst for producing cyclopentene from cyclopentadiene, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A. TiO 2 -Al 2 o 3 Preparation of composite oxide supports

[0043] Take the BET specific surface area as 90m 2 / g, clover-shaped Al with a pore volume of 0.58ml / g and a most probable pore diameter of 13nm 2 o 3 100g, with 58mlTiO 2 Immerse in titanium sulfate solution with a content of 19.05g, let it stand for 10-30 minutes, dry at 110°C for 6 hours, and then bake at 500°C for 4 hours to obtain TiO 2 16 wt% TiO 2 -Al 2 o 3 Composite oxide carrier;

[0044] B. Preparation of catalyst

[0045] 100 g of the composite oxide carrier prepared above is dropped into 60 ml of nickel nitrate solution with NiO content of 11.5 g, immersed for 120-180 minutes, dried at 110° C. for 6 hours, and then calcined at 500° C. for 4 hours to obtain a NiO content of 10.3wt% catalyst precursor; 100g of the catalyst precursor was dropped into 65ml Ag content of 3.1g silver nitrate aqueous solution, immersed for 1 hour, dried at 110°C for 6 hours, and then calcined at 500°C for 4 hou...

Embodiment 2-4

[0047] The catalyst preparation method is the same as in Example 1, except that the content of NiO, the type and content of co-active components are changed to prepare catalysts C-2, C-3, C-4, C-5 and C-6 respectively.

Embodiment 5

[0049] Step A is the same as in Example 1.

[0050] Step B

[0051] 100 g of the composite oxide carrier prepared above was put into 65 ml of silver nitrate aqueous solution with an Ag content of 3.45 g, immersed for 1 hour, dried at 110°C for 6 hours, and then calcined at 500°C for 4 hours. Then 100 g of the roasted product was dropped into 60 ml of nickel nitrate solution with a NiO content of 11.1 g, immersed for 120-180 minutes, dried at 110° C. for 6 hours, and then calcined at 500° C. for 4 hours to obtain catalyst C-7.

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Abstract

The invention discloses a catalyst for preparing cyclopentene by selective hydrogenation of cyclopentadiene, its preparation method and application. The catalyst is made of TiO 2 ‑Al 2 o 3 Composite oxide is carrier, load main active component Ni and co-active component, wherein, co-active component is selected from at least one in Ag and Fe; Based on the total weight of catalyst, the content of main active component Ni is oxidized 3‑30 wt% in terms of nickel, 1‑25 wt% in atomic terms of co-active components, TiO 2 ‑Al 2 o 3 The content of composite oxide is 45-96wt%. The catalyst disclosed in the present invention for the selective hydrogenation of cyclopentadiene to prepare cyclopentene has high selectivity and low-temperature activity, a large capacity for "green oil", stable hydrogenation activity, long-term use, convenient regeneration, and continuous operation And it is easy to separate from the product.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a catalyst for preparing cyclopentene from cyclopentadiene and its preparation method and application Background technique [0002] At present, my country's annual output of ethylene has exceeded 20 million tons. The C5 and C9 fractions of ethylene cracking contain a large amount of dicyclopentadiene, and the potential annual output of dicyclopentadiene has exceeded 1 million tons. However, currently most of dicyclopentadiene is directly burned as low value-added fuel oil, which not only wastes resources, but also causes environmental pollution. Dicyclopentadiene can be depolymerized by heating to produce its monomer cyclopentadiene, and cyclopentadiene can be selectively hydrogenated to prepare multi-purpose monoolefin cyclopentene. This is a high value-added utilization route of dicyclopentadiene resources. [0003] Cyclopentene is an important organic chemical raw mate...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/89B01J37/02C07C5/05C07C13/12
Inventor 熊凯纪玉国杜周季静张富春李正艳
Owner CHINA PETROLEUM & CHEM CORP
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