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Alpha,beta-unsaturated aldehyde ketone selective hydrogenation platinum-based catalyst, and preparation method and application thereof

A catalyst and unsaturated technology, applied in the α field, can solve problems such as high temperature, and achieve high activity, good application value and economic benefits

Pending Publication Date: 2020-06-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Au / Zn prepared by the deposition precipitation method provided by the Chinese patent whose patent publication number is CN108057448A x Fe 1-x o y (0≤x≤1, 0≤y≤1) The catalyst can catalyze the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol at a reaction temperature of 120-160 ° C, but the process temperature is slightly higher and the selectivity of cinnamyl alcohol is only 93.0%, Subsequent separation process is still required

Method used

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  • Alpha,beta-unsaturated aldehyde ketone selective hydrogenation platinum-based catalyst, and preparation method and application thereof
  • Alpha,beta-unsaturated aldehyde ketone selective hydrogenation platinum-based catalyst, and preparation method and application thereof
  • Alpha,beta-unsaturated aldehyde ketone selective hydrogenation platinum-based catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 40mL of benzyl alcohol into a 100mL round bottom flask, 33.3mg of Pt(acac) 2 Dissolve in benzyl alcohol and stir for 15 minutes until the solution is clear. The hydrotalcite carrier CoAl-HTs (Co:Al=2:1, 1:1) was uniformly dispersed in the above clear solution, and 1 atm CO gas was introduced under the condition of stirring, and heated at 180°C for 3h. Cool to room temperature, add 50mL of ethanol, wash with ethanol several times, dry at 70°C for 8h, and grind to obtain a supported monometallic Pt / CoAl-HTs catalyst. The loading amount of Pt is 0.1-6.0%, and the rest is carrier.

Embodiment 2

[0030] Add 40mL of benzyl alcohol into a 100mL round bottom flask, 33.3mg of Pt(acac) 2 and 10mg Fe(acac) 3 Dissolve in benzyl alcohol and stir for 15 min until the solution is clear. The multi-walled carbon nanotube carrier was uniformly dispersed in the above clear solution, and 1 atm CO gas was introduced under stirring, heated at 190°C for 2h, cooled to room temperature, washed several times with ethanol, and dried at 70°C for 13h to obtain the supported bimetallic Pt 3 Fe / CNTs catalyst. The loading amount of Pt is 0.1-6.0%, the content molar ratio of Fe and Pt is 0.01-1, and the rest is carrier.

Embodiment 3

[0032] Add 40mL of benzyl alcohol into a 100mL round bottom flask, 33.3mg of Pt(acac) 2 and 10mg Fe(acac) 3 Dissolve in benzyl alcohol and stir for 15 min until the solution is clear. Carrier CeO 2 or TiO 2 Disperse evenly in the above clear solution, pass 2atm CO gas under stirring, heat at 200°C for 5h, cool to room temperature, wash with ethanol several times, and dry at 70°C for 21h to obtain supported bimetallic Pt 3 Fe / CeO 2 catalyst. The loading amount of Pt is 0.1-6.0%, the content molar ratio of Fe and Pt is 0.01-1, and the rest is carrier.

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Abstract

The invention discloses an alpha,beta-unsaturated aldehyde ketone selective hydrogenation platinum-based catalyst, and a preparation method and an application thereof. The catalyst is a supported single-metal or double-metal solid catalyst and is prepared by adopting a co-reduction method. The catalyst has high conversion rate, selectivity and stability, and both the selectivity and the conversionrate exceed 99%.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and use, in particular to a platinum-based catalyst for selective hydrogenation of α, β-unsaturated aldehydes and ketones, its preparation method and use. Background technique [0002] α, β-unsaturated alcohols are an important class of organic chemical raw materials, which are widely used in many fields such as medicine, pesticides, spices, and solvents. with H 2 As a hydrogen source, the reaction route of selectively reducing α, β-unsaturated aldehydes and ketones to prepare α, β-unsaturated alcohols has extremely high atom economy, so the development of catalysts with high activity, high selectivity and high stability And the reaction process has important application value. Compared with noble metals such as Au and Ag and non-noble metal particle catalysts such as Co and Ni, supported Pt-based catalysts exhibit unique advantages, such as higher hydrogenation selectivity, catalytic act...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C29/141C07C33/32C07D307/44
CPCB01J23/8913B01J23/8906B01J23/894C07C29/141C07D307/44C07C33/32
Inventor 戴翼虎杨艳辉高兴金云云卢荻靳玉广周春梅万晓月
Owner NANJING UNIV OF TECH
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