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Preparation of supported catalyst for 1,4-butynediol

A supported catalyst and butynediol technology, which is applied in the preparation of organic compounds, molecular sieve catalysts, hydroxyl compounds, etc., can solve problems such as high copper oxide content of metal species, waste of copper resources, and unstable carrier magnesium silicate.

Inactive Publication Date: 2013-06-19
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst has the following disadvantages: (1) the carrier magnesium silicate is unstable, it will dissolve in the reaction system, and its life is short; (2) the amount of catalyst is large, and the content of metal species copper oxide is high, which is prone to agglomeration and cannot fully Give full play to the catalytic effect of each active center, resulting in a waste of copper resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Weigh 30.3 g Cu(NO 3 ) 2 ·3H 2 O, 4.5 g Bi(NO 3 )·5H 2 O, dissolve in acidic aqueous solution, stir well. 20 g of molecular sieve MCM-48 was added therein, stirred and allowed to stand. Then the mixture was evaporated under reduced pressure to remove the liquid, dried and calcined at high temperature to obtain CuO / Bi 2 o 3 / MCM-48 catalyst. The catalyst was used in the alkynylation reaction, and the selectivity of 1,4-butynediol was 97%.

Embodiment 2

[0011] Weigh 21 g Cu(Cl) respectively 2 2H 2 O, 4.5 g Bi(NO 3 )·5H 2 O, dissolve in acidic aqueous solution, stir well. 20 g of molecular sieve MCM-41 was added therein, stirred and allowed to stand. Then the mixture is dried and calcined at high temperature to obtain CuO / Bi 2 o 3 / MCM-41 catalyst. The catalyst was used in the alkynylation reaction, and the selectivity of 1,4-butynediol was 94%.

Embodiment 3

[0013] Weigh 25 g Cu(CH 3 COO) 2 ·H 2 O, 4.5 g Bi(NO 3 )·5H 2 O, dissolve in acidic aqueous solution, stir well. 20 g of molecular sieve SBA-15 was added therein, stirred and allowed to stand. Then the mixture is dried and calcined at high temperature to obtain CuO / Bi 2 o 3 / SBA-15 catalyst. The catalyst was used in the alkynylation reaction, and the selectivity of 1,4-butynediol was 90%.

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Abstract

The invention relates to preparation of a supported catalyst for 1,4-butynediol. The supported catalyst used is characterized in that a mesoporous molecular sieve is used as a carrier, and soluble copper salt and bismuth are loaded on the carrier by an impregnation method so that the mass content of copper in the catalyst is 15-30%, and the mass content of bismuth is 1-6%. In the prepared catalyst, the particle size of copper oxide is 10-80nm, and the bismuth oxide is amorphous powder; the copper oxide and the bismuth oxide are uniformly distributed on the carrier and interact with the carrier; and the catalyst has high activity and high selectivity in producing 1,4-butynediol through an alkyne hydroformylation reaction, is more stable and wear-resistant than similar catalysts, and saves copper resources.

Description

technical field [0001] The invention relates to a supported catalyst for producing 1,4-butynediol, in particular to the preparation and application of a copper-bismuth catalyst with mesoporous molecular sieve as a carrier. Background technique [0002] The industrial production of 1,4-butynediol is mainly the alkyne aldehyde method (Reppe method). For example, major domestic manufacturers such as Shanxi Sanwei, Sichuan Tianhua, and Xinjiang Meike Chemical all adopt this technology. In the 1940s, Dr. Reppe of Germany proposed the process of synthesizing 1,4-butynediol by alkyne aldehyde method: using cuprous acetylide as a catalyst, formaldehyde and acetylene were used to synthesize 1,4-butynediol in a high-pressure fixed bed. Among them, cuprous acetylene is obtained by reducing copper oxide in the reaction system of acetylene and formaldehyde, and bismuth oxide is added to the catalyst to avoid the formation of by-product polyyne. In order to reduce the operational risk of...

Claims

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Application Information

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IPC IPC(8): B01J29/035B01J29/03C07C33/046C07C29/42
Inventor 杨桂花王吉德董泽娟
Owner XINJIANG UNIVERSITY
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