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Amorphous nickel boron catalyst for hypnone hydrogenation and its preparation method

A catalyst, acetophenone technology, applied in the field of new amorphous catalyst and its preparation, can solve the problems of environmental pollution, low selectivity, large amount of waste aluminum lye and the like

Inactive Publication Date: 2004-12-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Though this catalyst has higher catalytic activity, selectivity is lower, and its selectivity only has 82% (J.Masson, S.Vidal, P.Cividino, P.Fouilloux, J.Court, Appl.Catal. A: General, 99(1993) 147-159), while producing a large amount of ethylbenzene by-products without any industrial value
In addition, the Raney Ni catalyst will produce a large amount of waste aluminum lye during the preparation process, causing serious environmental pollution

Method used

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  • Amorphous nickel boron catalyst for hypnone hydrogenation and its preparation method

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Experimental program
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Embodiment 1

[0018] Embodiment 1: Preparation of supported Ni-B / L amorphous alloy catalyst

[0019] L carrier (select SiO 2 ) was boiled and washed with 0.5wt.% dilute nitric acid for 1 hour before use, then dried overnight under an infrared lamp at 110°C, and then roasted in a muffle furnace at 450°C for 3 hours, and after grinding, screened 40-60 meshes for catalyst preparation. With a certain concentration of NiCl 2 The carrier was impregnated with the solution, dried in an oven at 110°C overnight, and then calcined in a muffle furnace at 200°C for 2h. After cooling to room temperature, 2.0M KBH 4 The solution is slowly dropped in, and the molar ratio is B / Ni=4 / 1. After the dropwise addition, wash with distilled water until the pH value is about 7.0, and then wash with absolute ethanol several times. The obtained catalyst is recorded as Ni-B / SiO 2 , and the characterization results are shown in Table 1.

Embodiment 2

[0020] Embodiment 2: Preparation of supported Ni-Sn-B / L amorphous alloy catalyst

[0021] L carrier (select SiO 2 ) is obtained by the processing method in Example 1. A certain weight of SnCl 2 Solid dissolved in a certain concentration and volume of NiCl 2 In the solution, impregnate the carrier with the obtained mixed solution, dry it in an oven at 110°C overnight, and then bake it in a muffle furnace at 200°C for 2h. After cooling to room temperature, 2.0M KBH 4 The solution is slowly dropped in, and the molar ratio is B / (Ni+Sn)=4 / 1. After the dropwise addition, wash with distilled water until the pH value is about 7.0, and then wash with absolute ethanol several times before use. NiCl2 The dosage remains the same, by changing the added SnCl 2 The amount of solids, Ni-Sn-B / SiO with different Sn content can be prepared 2 catalyst. The obtained catalyst is recorded as Ni-Sn-B / SiO 2 -1. Ni-Sn-B / SiO 2 -2. Ni-Sn-B / SiO 2 -3, etc., the characterization results are shown...

Embodiment 3

[0022] Embodiment 3: Preparation of supported Ni-La-B / L amorphous alloy catalyst

[0023] L carrier (select SiO 2 ) is obtained by the processing method in Example 1. A certain concentration and volume of NiCl 2 solution with a certain concentration of LaCl 3 The solutions are mixed, and the carrier is impregnated with the obtained mixed solution, and the preparation method is the same as in Example 2. NiCl 2 The dosage remains the same, by changing the added LaCl 3 The amount of solution, Ni-La-B / SiO with different La content can be prepared 2 catalyst. The obtained catalyst is recorded as Ni-La-B / SiO 2 -1. Ni-La-B / SiO 2 -2. Ni-La-B / SiO 2 -3, etc., the characterization results are shown in Table 2.

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Abstract

The present invention belongs to the field of chemical technology, and is new type of amorphous catalyst for acetophenone hydrogenating process to prepare phenethyl alcohol and its preparation process. The catalyst consists of Ni, B, metal additive M and carrier material L, where, Ni exists mainly in Ni-B or Ni-M-B amorphous alloy form and the metal additive M is one of Sn, Cr, Mo, W, Fe, Co and La. The catalyst is prepared through reducing metal ion and subsequent impurity elimination. The catalyst is used for acetophenone hydrogenating process to prepare phenethyl alcohol, and has simple preparation process, relatively low cost and much higher acetophenone hydrogenating activity and selectivity compared with traditional industrial Rancy Ni catalyst.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a novel amorphous catalyst for the selective hydrogenation of acetophenone to prepare phenylethanol and a preparation method thereof. Background technique [0002] Aromatic alcohols are an important class of chemical products, which are widely used in the production of spices, medicines and other fine chemical products. 1-Phenylethyl alcohol is a representative compound among aromatic alcohols, and it is also an important chemical product. It is widely used in the fragrance manufacturing industry for aroma reconciliation, and as the main component of rose fragrance for the synthesis of various rose oils and essential oils ; Phenylethyl alcohol is an important drug intermediate in the synthesis of many drugs, such as in the synthesis of ibuprofen, a non-steroidal sedative drug, phenylethyl alcohol is an important raw material. Among the many routes for the synthesis of ph...

Claims

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Application Information

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IPC IPC(8): B01J23/755C07C29/145C07C33/22
Inventor 王友臻乔明华胡华荣王卫江范康年
Owner FUDAN UNIV
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