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Industrial method for simultaneously preparing propaldehyde and butyraldehyde by catalytic dry gas concentrating gas

An industrial method, the technology of propionaldehyde, applied in the direction of carbon monoxide reaction preparation, organic chemistry, etc., can solve problems such as static mixers that have not been seen

Inactive Publication Date: 2013-11-06
四川省达科特能源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been no reports of using a static mixer as a hydroformylation reaction device, nor have there been reports of simultaneous hydroformylation of ethylene and propylene in the same device to obtain two products of propionaldehyde and butyraldehyde

Method used

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  • Industrial method for simultaneously preparing propaldehyde and butyraldehyde by catalytic dry gas concentrating gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]The aqueous solution of the rhodium-phosphine complex catalyst with a rhodium content of 1×10-4 mole / liter to 1×10-2 mole / liter is sent into the static mixing reactor through a circulating pump, and the hot water at about 90°C is sent through static mixing The jacket of the reactor, the circulating liquid is preheated to 70 °C, and then the catalytic dry gas is enriched to enrich the mixed gas (85% ethylene, 8% propylene) to the molar ratio of ethylene and propylene to hydrogen and carbon monoxide at 1:1.05 : 1.05 mixed feed gas, sent to the static mixing reactor in the same direction as the circulating liquid, under the action of the catalyst, ethylene, propylene, hydrogen and carbon monoxide undergo hydroformylation reaction. While feeding the mixed gas, change the hot water passing into the static mixing reactor into cooling water, and control the temperature in the reactor to be stable at about 70°C. After the reaction, the gas-liquid mixture enters the circulation t...

Embodiment 2

[0034] The use of catalyzer, the content of raw material olefin and operating process are with embodiment 1, and processing condition and reaction result are as follows:

[0035] Reaction pressure: 2.0MPa Reaction temperature: 80°C

[0036] Ethylene, propylene: hydrogen: carbon monoxide: 1:1.10:1.05 (molar ratio)

[0037] The space velocity of the fluid in the static mixing reactor: 0.5m / s

[0038] The gas flow rate into the static mixing reactor

[0039] Ratio to circulating fluid flow rate (volume ratio): 320

[0040] Ethylene, propylene conversion rate: 97%

[0041] Ethylene, propylene selectivity: 94%

[0042] N-butyraldehyde: isobutyraldehyde: 16:1

Embodiment 3

[0044] The use of catalyzer, the content of raw material olefin and operating process are with embodiment 1, and processing condition and reaction result are as follows:

[0045] Reaction pressure: 2.0MPa Reaction temperature: 90°C

[0046] Ethylene, propylene: hydrogen: carbon monoxide: 1:1.10:1.05 (molar ratio)

[0047] The space velocity of the fluid in the static mixing reactor: 0.5m / s

[0048] The gas flow rate into the static mixing reactor

[0049] Ratio to circulating fluid flow rate (volume ratio): 320

[0050] Ethylene, propylene conversion rate: 98%

[0051] Ethylene, propylene selectivity: 93%

[0052] N-butyraldehyde: isobutyraldehyde: 13:1

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Abstract

The invention discloses an industrial method for simultaneously preparing propaldehyde and butyraldehyde by catalytic dry gas concentrating gas, comprising the following steps: mixture gas containing ethylene and propylene after concentrating catalytic dry gas adopts a water-soluble rhodium phosphine complex catalyst to generate hydroformylation with hydrogen and carbon monoxide by a static mixed reactor and simultaneously generate a mixture of propaldehyde and butyraldehyde, and the mixture is rectified and separated to obtain propaldehyde and butyraldehyde products. The method has the characteristics of simple process flow, easy operating control, high mass transfer intensity of equipment and mild reaction condition, can simultaneously produce propaldehyde and butyraldehyde, and maximizes the use of oil resources.

Description

technical field [0001] The invention relates to mixing the mixed gas rich in ethylene and propylene after enriching the catalytic dry gas with hydrogen and carbon monoxide, adopting the aqueous solution rhodium-phosphine complex catalyst, and carrying out the hydroformylation reaction through a static mixing reactor to generate propionaldehyde and butyrate at the same time Industrial process for aldehydes. Background technique [0002] According to relevant information, there are hundreds of sets of catalytic cracking units in my country at present, and the by-product catalytic cracking dry gas is about 4.14 million tons, which contains about 730,000 tons of ethylene. Since the ethylene content in the catalytic dry gas is relatively low, if the ethylene is separated from the catalytic dry gas by using conventional separation technology, it is often difficult to pass the test economically. Therefore, finding an economically feasible separation method has become the goal purs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C47/02C07C45/49
Inventor 兰治淮朱代希刘清源余兰金李又福郑勇孙元李可根
Owner 四川省达科特能源科技股份有限公司