Precious metal carrying hydrogenation catalyst

A technology for hydrogenation catalysts and precious metals, applied in the direction of metal/metal oxide/metal hydroxide catalysts, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of material pollution, iron loss, etc., and achieve the increase of reaction interface Large, avoid loss, small particle size effect

Active Publication Date: 2004-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since iron is directly exposed on the surface of the catalyst, it may have adverse ef

Method used

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  • Precious metal carrying hydrogenation catalyst
  • Precious metal carrying hydrogenation catalyst
  • Precious metal carrying hydrogenation catalyst

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0046] Example 1

[0047] 189g Na 2 SiO 3 ·9H 2 O (Zhejiang Wenzhou Dongsheng Chemical Reagent Factory) was dissolved in 800 mL of distilled water, 3mol / L HCl solution was slowly added dropwise under stirring, the pH value of the solution was adjusted to 13, and it was filtered for use.

[0048] Add 23.4g FeCl to a 2-liter stirred reactor containing 1000mL distilled water 3 ·6H 2 O (Beijing Chaoyang Tonghui Chemical Plant) and 8.6g FeCl 2 ·4H 2 O (Beijing Shuanghuan Chemical Reagent Factory), under the protection of nitrogen, the temperature is increased to 85~90℃, and 30mL of 25% NH is added during high-speed stirring. 3 ·H 2 O solution, after stirring at high speed for 3 min, separate Fe with magnetic separator 3 O 4 Nanoparticle products. The deposited product after cleaning is ultrasonically dispersed in the above-mentioned pretreated Na 2 SiO 3 The solution is then transferred to a 2 liter stirred reactor, the temperature is raised to 85°C, and under ...

Example Embodiment

[0055] Example 2

[0056] 28.4g Na 2 SiO 3 ·9H 2 O (Zhejiang Wenzhou Dongsheng Chemical Reagent Factory) was dissolved in 600mL of distilled water, 3mol / L HCl solution was slowly added dropwise under stirring, the pH value of the solution was adjusted to 13, and it was filtered for later use.

[0057] Add 46.7g FeCl to a 2-liter stirred reactor filled with 1000mL distilled water 3 ·6H 2 O (Beijing Chaoyang Tonghui Chemical Plant) and 17.2g FeCl 2 ·4H 2 O (Beijing Shuanghuan Chemical Reagent Factory), under the protection of nitrogen, heat to 85~90℃, add 160mL 6Mol / L NaOH solution during high-speed stirring, and after high-speed stirring for 3min, separate Fe with magnetic separator 3 O 4 Nanoparticle products. The deposited product after cleaning is ultrasonically dispersed in the above-mentioned pretreated Na 2 SiO 3 The solution is then transferred to a 2 liter stirred reactor. The temperature is raised to 85°C. Under the protection of nitrogen and stirr...

Example Embodiment

[0062] Example 3

[0063] The above AL1 magnetic spherical Al(OH) 3 The product was put into a 1L autoclave containing 0.7L sulfonated kerosene medium, and subjected to hydrothermal treatment at 140°C for 3 hours under nitrogen protection. After the product was cleaned and degreasing, it was then placed in dilute ammonia water with pH=11 (measured at room temperature) at 80°C After aging for 6 hours (removing some of the impurities) and drying at 60°C, magnetic spherical Al(OH) with a boehmite structure (α-AlOOH) can be obtained 3 The product is sintered in an air atmosphere at 580°C for 2 hours to obtain about 60 g of γ-Fe 2 O 3 Spherical γ-Al with magnetic core 2 O 3 Carrier. The content ratio (weight ratio) of each component in the carrier material is: γ-Fe 2 O 3 : SiO 2 : Al 2 O 3 =30:9:61 (in addition, the carrier also contains part of water). This carrier has superparamagnetic characteristics.

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Abstract

The supported hydrogenating noble metal carrier consists of mainly spherical carrier material and noble metal as active component, and features that the spherical carrier material contains alumina in 50-99 wt% and magnetic grain in 1-50 wt%. The magnetic grain consists of SiO2 coating layer and kernel of Fe3O4, Fe and/or gamm-Fe2O3 in the weight ratio of 0.05-6 to 1. The noble metal as active component is one or several selected from Pt, Pd, Ru and Rh.

Description

technical field [0001] The present invention relates to a catalyst, more particularly to a hydrogenation catalyst loaded with precious metals. Background technique [0002] In the hydrogenation reaction process of petrochemical, fine chemical, pharmaceutical and other fields, supported palladium catalyst is a commonly used hydrogenation catalyst, and the carrier used is generally alumina, silica, activated carbon, etc. There are many reports on alumina and its preparation methods. For example, the spherical alumina carrier disclosed in US. Pat. 2,620,314 is formed by dropping a solution containing aluminum hydroxide sol and organic amine into a hot oil column through plate holes for solidification, aging and sintering. γ-Al disclosed in US.Pat.4,273,735 2 o 3 The carrier is made by hydrothermally treating the solidified aluminum hydroxide obtained in the oil column in the oil medium to obtain aluminum hydroxide with a boehmite structure, which is aged and sintered. US.Pa...

Claims

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Application Information

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IPC IPC(8): B01J23/40B01J32/00B01J35/08C07C5/02
Inventor 孟祥堃卢立军王宣吴佳慕旭宏宗保宁闵恩泽
Owner CHINA PETROLEUM & CHEM CORP
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