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Rhodium heterogeneous catalyst for carbonylation as well as preparation method and application thereof

A heterogeneous catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of slow reaction rate, low liquid feed rate, inability to To achieve industrial production and other issues

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Above catalyzer all adopts rhodium heterogeneous catalyst, and catalyst effect is better, but needs in H 2 Operation in the presence of presence or low liquid feed rate, slow reaction rate, unable to meet the requirements of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Catalyst preparation

[0016] Take 5g and the specific surface is 970m 2 / g of activated carbon particles, broken into 0.25-0.50mm particles, put into a vacuum device such as a rotary evaporation evaporating flask, turn on the vacuum device, evacuate to 50Pa, heat to 60°C, and keep the vacuum state for 1 hour to discharge the activated carbon pores air in the tunnel. Take 0.128g of RhCl 3 ·3H 2 O is made into a 10ml solution, then the solution is slowly added to the activated carbon, and continuously rotated and stirred until the solution and the activated carbon are mixed evenly. After soaking at room temperature for 12 hours, the catalyst is dried with a rotary evaporator and then transferred to a three-way tube furnace. The bed is placed in the center of the three-way tube furnace, and nitrogen is continuously passed through the catalyst bed, dried at 120°C for 3 hours, then heated to 300°C and roasted for 3 hours, then lowered, the catalyst is taken out and place...

Embodiment 2

[0020] Take 5g and the specific surface is 970m 2 / g of activated carbon particles, broken into 0.25-0.50mm particles, put into a vacuum device such as a rotary evaporation evaporating flask, turn on the vacuum device, evacuate to 50Pa, heat to 60°C, and keep the vacuum state for 1 hour to discharge the activated carbon pores air in the tunnel. Take 0.256g of RhCl 3 ·3H 2 O is made into a 10ml solution, then the solution is slowly added to the activated carbon, and continuously rotated and stirred until the solution and the activated carbon are mixed evenly. After soaking at room temperature for 12 hours, the catalyst is dried with a rotary evaporator and then transferred to a three-way tube furnace. The bed is placed in the center of the three-way tube furnace, and nitrogen is continuously passed through the catalyst bed, dried at 120°C for 3 hours, then heated to 300°C and roasted for 3 hours, then lowered, the catalyst is taken out and placed in a nitrogen-protected Schle...

Embodiment 3

[0024] Take 5g and the specific surface is 970m 2 / g of activated carbon particles, broken into 0.25-0.50mm particles, put into a vacuum device such as a rotary evaporation evaporating flask, turn on the vacuum device, evacuate to 50Pa, heat to 60°C, and keep the vacuum state for 1 hour to discharge the activated carbon pores air in the tunnel. Take 0.256g of RhCl 3 ·3H 2 O and 0.268g of H 2 IrCl 6 ·6H 2 O is made into a 10ml solution, then the solution is slowly added to the activated carbon, and continuously rotated and stirred until the solution and the activated carbon are mixed evenly. After soaking at room temperature for 12 hours, the catalyst is dried with a rotary evaporator and then transferred to a three-way tube furnace. The bed is placed in the center of the three-way tube furnace, and nitrogen is continuously passed through the catalyst bed, dried at 120°C for 3 hours, then heated to 300°C and roasted for 3 hours, then lowered, the catalyst is taken out and ...

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Abstract

The invention relates to a rhodium heterogeneous catalyst for carbonylation as well as a preparation method and application thereof. The catalyst is prepared from activated carbon with high specific surface as a carrier, rhodium as an active component and iridium or palladium or the like as a cotatalyst by using an improved vacuum impregnation method. When used for catalyzing a carbonylation reaction, the catalyst can still maintain good catalytic activity under the condition of increasing the raw material charging rate; for example, the charging rate of methanol can be 1-10 / h<-1> and is preferable 2-5 / h <-1>. Good catalytic activity ensures the charging rate of methanol, greatly increases the reaction rate of the catalyst and well adapts to the requirement for industrial production.

Description

technical field [0001] The invention relates to a rhodium heterogeneous catalyst and a preparation method thereof. The catalyst is applied in the reaction process of preparing carboxylic acid from lower alcohols, in particular to the process of preparing acetic acid and methyl acetate by carbonylation of methanol, and belongs to the field of organic catalysis. Background technique [0002] Acetic acid and methyl acetate are basic chemical raw materials. Acetic acid can be used to produce chemical products such as acetic anhydride and vinyl acetate, and can be used as a solvent for the production of terephthalic acid. At present, the production of acetic acid using the rhodium homogeneous catalyst of Monsanto has already had a considerable scale. The CATIVA process based on the iridium catalyst and the rhodium catalyst based on the CATIVA process developed by British Petroleum (BP) and Celanese (Celanese) The AO Plus process has also been promoted all over the world. The abov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/42B01J23/44B01J23/62B01J37/02B01J37/08C07C51/12C07C53/08
Inventor 刘博黄凤兴胡波吕顺丰王世亮李彤张秀英
Owner CHINA PETROLEUM & CHEM CORP
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