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Method for preparing aldehyde by hydroformylation of low light olefins

A technology for hydroformylation of carbon olefins and low-carbon olefins, which is applied in the field of hydroformylation of low-carbon olefins, and can solve problems such as high investment cost of stirring equipment, equipment failure, and affecting the safe and stable operation of the reactor.

Active Publication Date: 2014-09-10
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing technology has high investment cost of stirring equipment, which is prone to equipment failure, affects the safe and stable operation of the reactor, the circulating reaction liquid with heat removal interferes with the stirring effect, and the bubble column reactor is easy to form a concentration The problem of gradient and temperature inhomogeneity, providing a new method for the hydroformylation of light olefins

Method used

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  • Method for preparing aldehyde by hydroformylation of low light olefins

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Experimental program
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Effect test

Embodiment 1

[0028] use figure 1 The jet reactor shown includes a gas outlet 1, a liquid injection device 2, a gas distributor 3, a liquid inlet 4, a gas inlet 5 and a liquid outlet 6; wherein, the gas inlet 5 and the liquid inlet 4 are located in the reactor At the bottom of the reactor, the gas outlet 1 is located at the top of the reactor, and the liquid outlet 6 is symmetrically placed on both sides of the lower head of the reactor; the liquid injection device 2 is located on the gas distributor 3. The liquid injection device is a reduced-diameter tube type, and the gas distributor is a disc-type gas distributor with holes on the upper part.

[0029] Among them, the relationship between the reactor liquid level H and the reactor diameter D is H / D=2. The distance between the gas distributor and the bottom of the reactor a=0.25D. The distance between the liquid injection device and the gas distributor b=0.15D. The diameter of the liquid ejection device d=0.05D. The number of openings of...

Embodiment 2

[0034] Same as [Example 1], except that the relationship between the reactor liquid level H and the reactor diameter D is H / D=1.5. The distance between the gas distributor and the bottom of the reactor a=0.25D. The distance between the liquid injection device and the gas distributor b=0.15D. The diameter of the liquid ejection device d=0.1D. The number of openings of the disc gas distributor is 1000, and the openings are evenly distributed at equal distances.

[0035] The above-mentioned reactor is used in the reaction of mixed butene oxo to produce valeraldehyde. The feed rate of mixed butene is 1970g / hr, the feed rate of synthesis gas is 775g / hr, CO / H 2 =1:1 (mol / mol), the reaction temperature is 80°C, the operating pressure is 1.6MPa, the rhodium catalyst concentration in the reactor is 250ppm, and the phosphine ligand / rhodium molar ratio is 8:1.

[0036] The result is: the total conversion rate of olefin is 89%, and the selectivity of aldehyde> 97%, the product n- / isovalerald...

Embodiment 3

[0038] Same as [Example 1], except that the relationship between the reactor liquid level H and the reactor diameter D is H / D=2.5. The distance between the gas distributor and the bottom of the reactor a=0.25D. The distance between the liquid injection device and the gas distributor b=0.2D. The diameter of the liquid ejection device d=0.1D. The number of openings of the disc gas distributor is 1000, and the openings are evenly distributed at equal distances.

[0039] The above-mentioned reactor is used in the reaction of mixed butene oxo to produce valeraldehyde. The feed rate of mixed butene is 1970g / hr, the feed rate of synthesis gas is 775g / hr, CO / H 2 =1:1 (mol / mol), the reaction temperature is 80°C, the operating pressure is 1.6MPa, the rhodium catalyst concentration in the reactor is 250ppm, and the phosphine ligand / rhodium molar ratio is 8:1.

[0040] The result is: the total conversion rate of olefin is 91%, the selectivity of aldehyde> 95%, the product n- / isovaleraldehyde...

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Abstract

The invention relates to a method for preparing aldehyde by hydroformylation of low light olefins, which solves the problems that the investment cost of stirring equipment is high, equipment fault is easy to generate, safe and stable operation of a reactor is influenced, a cycle reaction solution can interfere with the stirring effect, and the unevenness of concentration gradient and temperature is easily formed by the bubbling tower reactor. According to the invention, low carbon olefin and synthetic gas containing hydrogen and CO respectively pass through a liquid inlet 4 and an air inlet 5 for supplying to a jet reactor, the jet reactor comprises an air outlet 1, a liquid jet apparatus 2, a gas distributor 3, the liquid inlet 4, the air inlet 5 and liquid outlets 6; wherein the air inlet 5 and the liquid inlet 4 are positioned at the bottom of the reactor, the air outlet 1 is positioned at top of the reactor, and the liquid outlets 6 are symmetrically placed at two sides of a lower sealing head of the reactor; and the liquid jet apparatus 2 is positioned on the gas distributor 3; so that the technical scheme better solves the problems. The method can be used for industrial production for preparing aldehyde by hydroformylation of low light olefins.

Description

Technical field [0001] The invention relates to a method for the hydroformylation of low-carbon olefins. Background technique [0002] Hydroformylation refers to olefins and H 2 / CO mixture (syngas) at a certain temperature and pressure, in the presence of a catalyst containing at least one element of cobalt, rhodium or ruthenium uniformly dissolved in the reaction medium, with or without phosphorus, arsenic, antimony or nitrogen ligands , The process in which low-carbon olefins react with carbon monoxide and hydrogen. [0003] Low-pressure oxo synthesis is currently the main method for producing aldehydes from low-carbon olefins. Most of the industrial processes for the production of aldehydes from low-carbon olefins use rhodium-phosphine complex catalyst systems, which belong to the so-called "homogeneous catalysis" field. Large-scale industrial production adopts continuous operation mode, raw material H 2 / CO and olefin are directly passed into the catalyst solution, and certa...

Claims

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Application Information

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IPC IPC(8): C07C45/50C07C47/02
CPCC07C45/505C07C47/02
Inventor 陈迎许慎艳张艺贾微贾震
Owner SINOPEC SHANGHAI ENG
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