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Ruthenium-carbon catalyst as well as preparation method and application thereof

A technology of ruthenium carbon catalyst and co-catalyst, which is applied in the field of ruthenium carbon catalyst and its preparation, can solve problems such as difficulty in obtaining nerol or geraniol, and achieve the effect of improving selectivity and reaction conversion rate

Active Publication Date: 2021-10-15
SUZHOU SINOCOMPOUND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The C=C double bond, C=O bond and C=C double bond conjugated with the carbonyl in the citral molecule can be hydrogenated in hydrogen, so the nerol or geranol produced by selective carbonyl hydrogenation Alcohol is hard to get

Method used

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  • Ruthenium-carbon catalyst as well as preparation method and application thereof
  • Ruthenium-carbon catalyst as well as preparation method and application thereof

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preparation example Construction

[0037] One embodiment of the present invention provides the preparation method of above-mentioned any one ruthenium carbon catalyst, comprises following steps S10~S20:

[0038] Step S10: soak the activated carbon carrier in a reducing solvent and take it out.

[0039] Step S20: adding the activated carbon carrier to the precursor solution containing ruthenium ions and co-catalysts, impregnating, and drying to obtain a ruthenium carbon catalyst; the co-catalyst is a compound containing phosphorus and iron that can coordinate with ruthenium ions; the ruthenium carbon catalyst includes activated carbon Carrier and ruthenium nanoparticles and promoters loaded on the activated carbon carrier; in the ruthenium carbon catalyst, the mass content of ruthenium nanoparticles is 1%~6%.

[0040] The preparation method of the above-mentioned ruthenium carbon catalyst, by soaking the activated carbon carrier in a reducing solvent or a solution containing a reducing agent, the activated carbo...

Embodiment 1

[0067] After soaking 90 grams of activated carbon carrier in 1000 grams of methanol for 8 hours, it was dried at 20° C., and two (dicyclohexylphosphine) ferrocene ruthenium chloride solutions containing 5 grams of ruthenium were added to the activated carbon carrier at 70° C., 120 ℃ drying to generate ruthenium carbon catalyst, which is counted as 4%Ru / C catalyst 1; where 4% refers to the mass content of ruthenium nanoparticles in the ruthenium carbon catalyst, the same below.

Embodiment 2

[0069] After soaking 94 gram gac carriers in 1000 gram methanol for 8 hours, dry at 20 DEG C, the bis(diphenylphosphine) ferrocene ruthenium chloride solution containing 3 gram ruthenium is added in gac carrier at 80 DEG C, 110 ℃ drying to produce 2.5%Ru / C catalyst 2.

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Abstract

The invention relates to a ruthenium-carbon catalyst as well as a preparation method and application thereof. The ruthenium-carbon catalyst comprises an activated carbon carrier, ruthenium nanoparticles and a cocatalyst, the ruthenium nanoparticles and the cocatalyst are loaded on the activated carbon carrier, and the cocatalyst is a compound containing phosphorus and iron and capable of being coordinated with ruthenium ions; in the ruthenium-carbon catalyst, the mass content of the ruthenium nanoparticles is 1%-6%. According to the ruthenium-carbon catalyst, the activated carbon serves as a carrier, ruthenium nano-particles in a specific proportion are loaded, meanwhile, a phosphorus and iron containing compound capable of being coordinated with ruthenium ions is loaded to serve as a cocatalyst, the ruthenium-carbon catalyst can be used for catalyzing carbonyl selective hydrogenation, and then the selectivity and the reaction conversion rate of carbonyl selective hydrogenation are improved; for example, the catalyst is used for selective hydrogenation catalysis of carbonyl groups of unsaturated aldehydes to produce unsaturated alcohols. The ruthenium-carbon catalyst is used for selective hydrogenation of carbonyl of citral to prepare nerol and geraniol, the reaction conversion rate reaches 95%-100%, and the selectivity to nerol and geraniol reaches 90%-99%.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a ruthenium carbon catalyst and its preparation method and application. Background technique [0002] Citral is a typical α,β-unsaturated aldehyde, which has important application value in industries such as spices and pharmaceutical intermediates, and its selective hydrogenation products unsaturated alcohols (nerol and geraniol) are valuable Spices and pharmaceutical intermediates are widely used in many fields. [0003] The C=C double bond, C=O bond and C=C double bond conjugated with the carbonyl in the citral molecule can be hydrogenated in hydrogen, so the nerol or geranol produced by selective carbonyl hydrogenation Alcohol is difficult to obtain. From the point of view of thermodynamics, the bond energy of C=C bond is smaller than that of C=O bond, which is not conducive to the formation of carbonyl selective hydrogenation products. Therefore, designing highly selecti...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J31/24B01J37/02C07C29/141C07C33/02
CPCB01J23/462B01J37/0201B01J31/2414C07C29/141B01J2531/0263B01J2231/643B01J2531/821B01J2531/842B01J35/23C07C33/02
Inventor 钱棋春倪自林
Owner SUZHOU SINOCOMPOUND TECH
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