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Catalyst and preparation method and application thereof

A catalyst and porous carbon technology, applied in the field of selective reduction catalysts of unsaturated hydrocarbons and their preparation, can solve the problems of less research and achieve the effects of high catalytic activity, good catalytic activity, and reduced industrial application cost

Inactive Publication Date: 2019-07-26
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few studies on the catalytic selective reduction of alkynes under normal temperature and pressure conditions.

Method used

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  • Catalyst and preparation method and application thereof
  • Catalyst and preparation method and application thereof
  • Catalyst and preparation method and application thereof

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Embodiment Construction

[0020] The present invention will be explained in more detail below in conjunction with examples and characterization data.

[0021] (1) Preparation of catalyst

[0022] 1. Preparation of carrier

[0023] The aqueous solution of sodium glutamate and sodium salts such as sodium chloride, sodium nitrate and sodium carbonate is thoroughly mixed, evaporated to dryness and calcined to obtain CN; the nitrogen content is 1.92-4.13 wt%.

[0024] 2. Preparation of Phosphorus-free Catalyst

[0025] Take the previously prepared CN and place them in a round-bottomed flask, add absolute ethanol, add palladium salts such as palladium acetate and palladium chloride solution under stirring, evaporate to dryness to obtain a catalyst precursor, and finally calcinate the precursor under the protection of hydrogen to obtain a catalyst . The prepared catalysts were respectively CN-Pd.

[0026] 3. Preparation of phosphorus-doped catalyst: take carbon material CN and a round bottom flask, add ab...

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Abstract

The invention discloses an unsaturated hydrocarbon selective reduction catalyst formed by loading metal palladium on a porous carbon carrier and a preparation method and application thereof. The catalyst is formed by loading palladium on coralloid stereoscopic porous nitrogen-doped carbon serving as a carrier. The preparation method includes: calcining sodium glutamate and sodium salt to obtain acarbon carrier, soaking the carbon carrier in a palladium solution, and calcining under hydrogen protection to obtain the catalyst. The catalyst can be used for phenylacetylene hydrogenation catalysisto prepare styrene. The catalyst has high catalytic activity, and each of conversion rate and selectivity of the catalyst can be higher than 90% during styrene preparation through phenylacetylene hydrogenation catalysis.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a selective reduction catalyst for unsaturated hydrocarbons formed by metal palladium supported on a porous carbon carrier, a preparation method and an application thereof. Background technique [0002] The selective reduction of unsaturated hydrocarbons has a wide range of applications in industry, but also has great challenges. Industrially, styrene, the raw material for polystyrene production, generally contains a small amount of phenylacetylene, and the presence of phenylacetylene is very likely to cause poisoning of polystyrene catalysts. The selective reduction of phenylacetylene to styrene by a catalyst is considered a very good method for removing phenylacetylene, because this method can not only remove phenylacetylene, but also the product is just the raw material for the production of required polystyrene. However, the huge challenge of this method is to e...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C07C15/46C07C5/05
CPCB01J27/24C07C5/05C07C2527/24B01J35/399B01J35/393B01J35/23B01J35/615B01J35/647C07C15/46
Inventor 李茸姜蓬博王开志马磊
Owner LANZHOU UNIVERSITY
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