Silver modified raney copper catalyst, preparation method thereof and method for selective acetylene hydrogenation of C-4 fraction

A carbon four fraction and Raney copper technology, applied in the field of carbon four fractions selective hydrogenation and alkyne removal, silver-modified Raney copper catalyst, can solve the problem of low selectivity, low catalyst operating space velocity, 1,3- Butadiene loss and other problems, to achieve the effect of high catalytic efficiency, high selectivity, high copper loading

Active Publication Date: 2017-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the selectivity that exists in the method of the prior art of selective hydrogenation to remove alk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0043] This preparation example is used to prepare a silver-modified Raney copper catalyst. specifically:

[0044] (1) Weigh 226g of metal copper powder and 178g of metal aluminum powder, calcined in a tubular atmosphere furnace under nitrogen atmosphere, the reaction temperature is 650 ° C and kept for 3h, after the reaction is completed, it is naturally cooled to room temperature to obtain copper-aluminum alloy.

[0045] (2) After pulverizing the copper-aluminum alloy into an alloy block of about 2.0 mm, slowly adding 20% ​​by weight of sodium hydroxide solution in batches for an activation time of 2h to obtain a Raney copper catalyst; The Raney copper catalyst was washed 20-40 times with deionized water (1000 mL) at 35° C. to a pH of 7.5.

[0046] X-ray fluorescence spectroscopic analysis: the Cu content in the Raney copper catalyst is 74% by weight, and the Al content is 26% by weight. Since the catalyst contains copper and copper-aluminum alloy (the weight ratio of coppe...

preparation example 2

[0050] This preparation example is used to prepare a silver-modified Raney copper catalyst. specifically:

[0051] (1) Weigh 226g of metal copper powder and 178g of metal aluminum powder, calcined in a tubular atmosphere furnace under nitrogen atmosphere, the reaction temperature is 650 ° C and kept for 3h, after the reaction is completed, it is naturally cooled to room temperature to obtain copper-aluminum alloy.

[0052] (2) After pulverizing the copper-aluminum alloy into an alloy block of about 2.0 mm, slowly adding 20% ​​by weight of sodium hydroxide solution in batches for an activation time of 2h to obtain a Raney copper catalyst; The Raney copper catalyst was washed 20-40 times with deionized water (1000 mL) at 35° C. to a pH of 7.5.

[0053] X-ray fluorescence spectroscopic analysis: the Cu content in the Raney copper catalyst is 74% by weight, and the Al content is 26% by weight. Since the catalyst contains two components, copper and copper-aluminum alloy, the Raney...

preparation example 3

[0057] This preparation example is used to prepare a silver-modified Raney copper catalyst. specifically:

[0058] (1) Weigh 226g of metal copper powder and 178g of metal aluminum powder, calcined in a tubular atmosphere furnace under nitrogen atmosphere, the reaction temperature is 650 ° C and kept for 3h, after the reaction is completed, it is naturally cooled to room temperature to obtain copper-aluminum alloy.

[0059] (2) After pulverizing the copper-aluminum alloy into an alloy block of about 2.0 mm, slowly adding 20% ​​by weight of sodium hydroxide solution in batches for an activation time of 2h to obtain a Raney copper catalyst; The Raney copper catalyst was washed 20-40 times with deionized water (1000 mL) at 35° C. to a pH of 7.5.

[0060] X-ray fluorescence spectroscopic analysis: the Cu content in the Raney copper catalyst is 74% by weight, and the Al content is 26% by weight. Since the catalyst contains two components, copper and copper-aluminum alloy, the Raney...

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PUM

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Abstract

The invention relates to the field of acetylene hydrogenation and discloses a silver modified raney copper catalyst, a preparation method thereof and a method for selective acetylene hydrogenation of C-4 fraction. The preparation method of the silver modified raney copper catalyst comprises the following steps that copper-aluminum alloy and a solution containing caustic alkali are mixed, and the raney copper catalyst is obtained; and then the raney copper catalyst and a solution containing silver ion are contacted for reacting. The silver modified raney copper catalyst provided by the invention is high in selectivity and catalytic efficiency, and the space velocity can be remarkably improved when the silver modified raney copper catalyst provided by the invention is used for selective acetylene hydrogenation of the C-4 fraction.

Description

technical field [0001] The invention relates to the field of hydrogenation and removal of alkynes, in particular to a method for preparing a silver-modified Raney copper catalyst, a silver-modified Raney copper catalyst prepared by the method, and a carbon four fraction selective hydrogenation removal alkyne method. Background technique [0002] C-4 fractions refer to the mixture of various alkanes, alkenes, dienes and alkynes containing four carbon atoms, of which 1,3-butadiene is an important chemical raw material for the production of synthetic rubber. The polymer-grade diene has high requirements for alkyne impurities, such as polymer-grade butadiene, which requires a purity greater than 99.7% by weight and an alkyne content of less than 50ppm. In order to meet the requirements of the polymerization grade, the C4 fraction needs to be deacetylated. Selective hydrogenation to remove alkynes in the C4 fraction is a more economical method for removing alkynes. The method ...

Claims

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Application Information

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IPC IPC(8): B01J25/00C07C7/167C07C11/167
Inventor 戴伟张功尚乐毅汪晓菁彭晖王秀玲鲁树亮吴佳佳
Owner CHINA PETROLEUM & CHEM CORP
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