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Fe series selective hydrogenation catalyst, and preparation method and application thereof

A technology for selective hydrogenation and catalysts, which is applied in the fields of hydrogenation to hydrocarbons, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. The problems of low acetylene conversion rate, etc., can achieve the effect of high olefin increment, mild hydrogenation activity and good selectivity

Active Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is to prepare intermetallic compounds under high temperature conditions for selective hydrogenation of acetylene. The conversion rate of acetylene is low and the reaction temperature is high, which is not conducive to industrial application.
And the catalyst is prepared by hot melting method, the conditions are harsh
[0008] To sum up, the selective hydrogenation of low-carbon alkynes and dienes currently mainly uses noble metal catalysts, and a lot of work has been done on the research and development of non-noble metal catalysts, but there is still a long way to go before industrial applications

Method used

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  • Fe series selective hydrogenation catalyst, and preparation method and application thereof
  • Fe series selective hydrogenation catalyst, and preparation method and application thereof
  • Fe series selective hydrogenation catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Weigh 100ml of a clover-shaped α-alumina carrier of Φ4.5×4.5mm, and place it in a 1000ml beaker. Take ferric nitrate, dissolve it in 60ml of deionized water by heating, adjust the pH value to 2.5, impregnate the equal volume on the surface of the carrier, shake the carrier quickly for 6 minutes, let it stand for 30 minutes until the adsorption equilibrium, and completely seal the mouth of the beaker with plastic wrap , aged in a water bath at 60°C for 30 minutes, and then in an oven according to the procedure: Dry the catalyst, move the catalyst into an evaporating dish, and activate the catalyst in a muffle furnace using a temperature-programmed method. The activation procedure: Weigh lanthanum nitrate and impregnate according to the above preparation steps. The physical properties of the catalyst are shown in Table 1.

[0067] Evaluation method:

[0068] Catalyst performance evaluation was carried out on a 10ml micro-reactor device. The catalyst was crushed in ...

Embodiment 2

[0075] At 50°C, the NaAlO 2 solution and ZrCl 4 The solution was stirred and mixed, then neutralized with nitric acid solution, stirred for 10 hours, and uniform Al-Zr particles were formed by co-precipitation. The resultant was filtered and the Na in it was washed with deionized water + and Cl - Ions, and then add an appropriate amount of polyvinyl alcohol with a mass concentration of 15% as a pore-forming agent, and knead it into shape. Dry at 130°C for 2 hours, and calcined at 650°C for 4 hours to obtain a Zr-Al composite support, the mass ratio of alumina to zirconia in the support is 4:1.

[0076] Weigh 100ml of the composite carrier and place it in a 1000ml beaker. Take ferric chloride and potassium chloride, heat and dissolve in 100ml deionized water, adjust the pH value to 2.0, impregnate the liquid at a temperature of 80°C, impregnate the excess onto the carrier, shake the beaker for 10 minutes, filter off the excess impregnating liquid, and keep the catalyst at 6...

Embodiment 3

[0083] Weigh 100ml of a Φ1.5mm spherical α-alumina carrier. Dissolve ferric nitrate in 40ml of deionized water, adjust the pH value to 3.0, soak the liquid at a temperature of 40°C, spray it on the carrier with a watering can, load it in the drum for 10 minutes to make the active components evenly loaded, and control the loading process in 6 minutes to complete, and then In the oven follow the procedure: Dry the catalyst, move the catalyst into an evaporating dish, and activate the catalyst in a muffle furnace using a temperature-programmed method. The activation procedure: Obtain a catalyst dip.

[0084] Using the same method as the first step, take cerium nitrate, dissolve it, spray it on the surface of the catalyst, dry it, and roast it to obtain the final catalyst. Drying procedure: Roasting procedure: The XRD analysis of the catalyst after reduction is as follows: figure 1 shown.

[0085] The physical properties of the catalyst are shown in Table 1.

[0086] Ev...

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Abstract

The invention relates to a Fe series selective hydrogenation catalyst in which active component Fe accounts for 2-15 (wt)%, active component X accounts for 0-2 (wt)%, and the balance of oxygen and a carrier; the X is selected from one or more of K, La and Ce; for the catalyst, the specific surface is 10-300m2 / g, and the pore volume is 0.2-0.65ml / g. The catalyst can be used for selective hydrogenation of acetylene, as well as methylacetylene and propadiene (MA PD) in C2-3 splitting decomposition fraction. The catalyst is wild in hydrogenation activity, excellent in selectivity to olefins, high in increment of olefins, good in operation flexibility, low in production amount of green oil, and good in long period running; and the cost of the catalyst is greatly lower than that of a noble metal Pd catalyst.

Description

technical field [0001] The invention relates to an Fe-based selective hydrogenation catalyst and its preparation method and application, which are used for the selective hydrogenation of acetylene, propyne (MA) and propadiene (PD) contained in carbon dioxide cracking fractions to prepare ethylene and propylene. Background technique [0002] Ethylene and propylene are one of the most important basic raw materials in the petrochemical industry. As monomers for the synthesis of various polymers, most of them are produced from petroleum hydrocarbons (such as ethane, propane, butane, naphtha, and light diesel oil, etc.) Cracked in the system. The ethylene-based C2 fraction obtained by this method also contains 0.5% to 2.5% (mole fraction) of acetylene. The presence of acetylene will complicate the polymerization process of ethylene and deteriorate the polymer properties. When polyethylene is produced by high-pressure method, there is a danger of explosion due to the accumulatio...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/83C07C5/09C07C11/04C07C5/05C07C11/06C07C7/167C07C7/163B01J35/10
CPCC07C5/05C07C5/09C07C7/163C07C7/167B01J23/002B01J23/78B01J23/83B01J2523/00B01J35/613B01J35/633B01J35/635B01J35/615B01J2523/842B01J2523/3706B01J2523/31B01J2523/48B01J2523/11B01J2523/3712B01J2523/47B01J2523/13B01J2523/41C07C11/04C07C11/06Y02P20/52
Inventor 梁玉龙车春霞韩伟张峰苟尕莲钱颖景喜林蔡小霞张忠东谷丽芬郭珺景丽杨珊珊
Owner PETROCHINA CO LTD
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