Quenched skeleton cobalt base catalyst for cinnamyl aldehyde hydrogenation to prepare cinnamyl alcohol and its preparing method

A cobalt-based catalyst and catalyst technology, applied in the chemical industry, can solve the problems of high price, unsuitable cinnamyl alcohol, and the highest yield of less than 50%.

Inactive Publication Date: 2005-03-02
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these catalysts have high catalytic activity and selectivity, they are expensive; while traditional Ni-based catalysts (such as Raney Ni) are not suitable for cinnamyl alcohol production, and the highest yield is less than 50%

Method used

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  • Quenched skeleton cobalt base catalyst for cinnamyl aldehyde hydrogenation to prepare cinnamyl alcohol and its preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Preparation of quenched Co-Al alloy

[0020] Metals Co and Al with a weight ratio of 40 / 60 were added to the quartz tube, and the sample was heated to 1573K in a high-frequency furnace to melt and alloy it. Use argon to quickly press the molten alloy from the quartz tube onto the high-speed rotating water-cooled copper roller and throw it out, so that the alloy is ~10 6 Cool at a rate of K / s to obtain alloy strips with a thickness of 2 μm and a width of 5 mm. Grind the strip-shaped alloy in an agate mortar and sieve, and take the part with a particle size of 100-200 mesh for aluminum extraction and activation.

Embodiment 2

[0021] Embodiment 2: the preparation of quenching framework Co catalyst (RQ Co)

[0022] Heat 100 mL of 6.0 M NaOH solution to 363 K, and then add 10.0 g of quenched Co-Al alloy in batches under slow magnetic stirring. After adding the alloy, continue to stir at this temperature for 1.0h, so that the aluminum in the alloy is fully extracted. The obtained black solid powder was washed with a large amount of distilled water to neutrality, the water was replaced with ethanol three times, and stored in ethanol for later use. Some characterization results of the catalyst are shown in Table 1.

Embodiment 3

[0023] Embodiment 3: the preparation of modified type quenching framework Co-M catalyst (RQ Co-M, M is Cr, Mn, Fe, Ni, Cu, Zn, Sn or Mo)

[0024] Add 10.0 g of quenched skeleton Co catalyst to 220 mL of CrCl at 303 K 3 Ethanol solution, MnCl 2 ethanol solution, FeCl 2 Ethanol solution, NiCl 2 ethanol solution, CuCl 2 Ethanol solution, ZnCl 2 Ethanol solution, SnCl 2 Ethanol solution or Na 2MoO 4 The aqueous solution was stirred for 60 min. After the reaction, wash 3 times with distilled water, then wash 3 times with ethanol, and store in ethanol. The addition amount of the additive is 0.10 g by weight of the metal element. Some characterization results of the catalyst are shown in Table 1.

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Abstract

The present invention belongs to the field of chemical technology, and especially one kind of quenched skeleton cobalt base catalyst for selective cinnamyl aldehyde hydrogenation to prepare cinnamyl alcohol and its preparation process. The catalyst consists of Co as the active component, Al and metal additive M. The preparation process includes quenching molten alloy at rate over 10E6 K/s in single roller method to obtain quenched Co-Al alloy; alkali extracting quenched Co-Al alloy to eliminate its Al to obtain quenched skeleton Co catalyst; and finally soaking the quenched skeleton Co catalyst in solution of M element to obtain the modified quenched skeleton Co-M catalyst. The quenched skeleton Co-M catalyst is used in cinnamyl aldehyde hydrogenation to prepare cinnamyl alcohol and has much higher hydrogenation activity and selectivity than those of Raney Co catalyst and much higher selectivity than that of Raney Ni catalyst.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a novel quenching skeleton cobalt-based catalyst used for hydrogenating cinnamaldehyde to produce cinnamyl alcohol and a preparation method thereof. Background technique [0002] Cinnamyl alcohol (COL) is a representative of α, β-unsaturated alcohols. It is a fine organic product with high added value and can be used as an important raw material and intermediate in the production of spices, drugs and other fine chemical products. It is also widely used in organic synthesis. The production of cinnamyl alcohol is usually prepared by treating natural sage oil, Peruvian gum and cinnamon oil with caustic alkali hot solution, which has high production cost, low yield and serious environmental pollution. The selective reduction of cinnamaldehyde (CAL) to prepare cinnamyl alcohol is not only cheap, but also conducive to large-scale production. There are various un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C07C29/141C07C33/32
Inventor 乔明华胡华荣阎世润范康年
Owner FUDAN UNIV
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