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A kind of preparation method of hydrogenation catalyst

A hydrogenation catalyst and carbonization technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problem of high cost of catalyst preparation, achieve good activity and stability, improve catalytic activity, and high catalytic activity. Effect

Active Publication Date: 2016-03-02
大连锡安科技有限公司
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  • Abstract
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Problems solved by technology

Due to the high cost of catalyst preparation due to the use of noble metals, how to reduce the amount of noble metals while improving the catalytic activity and selectivity of the catalyst is one of the problems that still need to be solved

Method used

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  • A kind of preparation method of hydrogenation catalyst

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Embodiment 1

[0015] Preparation of activated carbon carrier: Take coconut shell powder that has been crushed and passed through 100 meshes, and put it in a muffle furnace for carbonization at 600°C for 1.5 hours to obtain preliminary carbonized carbon powder; heat the carbon powder to 800°C, and pass in water vapor for activation. Activated carbon powder was obtained by acid washing, rinsing, and drying after activation, and the heating rate during both carbonization and activation was 10°C / min.

[0016] Modification of activated carbon carrier: impregnate the activated carbon powder obtained above with an equal volume of cerium nitrate aqueous solution, fully impregnate for 30 minutes, place the impregnated product in an oven, remove water by heating and evaporating, and place the dried product in a muffle furnace Calcined at 400° C. for 1 hour under the protection of nitrogen to obtain a modified activated carbon carrier.

[0017] Loading of active components: Prepare platinum nitrate so...

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Abstract

The invention discloses a method for preparing a hydrogenation catalyst. The catalyst adopts a cerium-modified carrier activated carbon as an auxiliary agent, thereby effectively improving the catalytic activity of the catalyst without affecting its selectivity. The active components of the catalyst are sprayed and impregnated step by step, so that the active metal platinum is distributed in a gradient from the inside to the outside of the carrier, thereby effectively reducing the loading of precious metals, and the prepared catalyst has good activity and stability. In addition, the active metal in the catalyst exists in two forms of Pt2+ and elemental Pt, and a small amount of PtO is mixed in the elemental Pt in the catalyst, and the small amount of PtO has higher catalytic activity.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a catalyst for preparing ethanol by hydrogenating acetic acid. Background technique [0002] Ethanol is an important solvent and chemical raw material, and it is also an ideal high-octane non-polluting vehicle fuel and its additives. Brazil has been using ethanol as vehicle fuel or fuel additive for many years. In recent years, my country has implemented the promotion of ethanol gasoline in many provinces, and the effect is obvious. With the improvement of environmental quality requirements, the development of alcohol fuel and the addition of alcohol or ether in gasoline have become the main way to improve automobile fuel. my country has a large population but insufficient arable land. Generally speaking, food is not abundant, and oil resources are relatively insufficient, while coal resources are relatively abundant. Therefore, the research and development of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C29/149C07C31/08
Inventor 叶澄
Owner 大连锡安科技有限公司