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Method for preparing aldehyde through olefin hydrogen formylation

A technology of olefin hydroformylation and olefins, which is applied in the field of olefin hydroformylation to aldehydes, can solve the problems of low conversion rate of raw materials and low selectivity of target products, and achieve the effects of improving reaction efficiency, optimizing effective distribution, and easy operation

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that in the prior art, in the olefin hydroformylation reaction process, the conversion rate of raw materials is low and the selectivity of the target product is low.

Method used

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  • Method for preparing aldehyde through olefin hydrogen formylation
  • Method for preparing aldehyde through olefin hydrogen formylation
  • Method for preparing aldehyde through olefin hydrogen formylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Attached figure 1 The shown device adopts the rhodium catalyst in Example 1 of document CN200910058201.6 as the catalyst, and the olefin is selected from ethylene, and the molar ratio of hydrogen: CO: ethylene: Rh is 1: 1: 0.8: 0.2; the total amount of gas is 100m 3 / h, under the condition that the molar ratio of the first mixed gas of hydrogen, CO and ethylene to the second mixed gas of hydrogen, CO and ethylene is 2:1, the two mixed gases are respectively fed from the first gas inlet 2 And the second gas inlet 16 enters the olefin hydroformylation reactor, and diffuses into the lower packing 15 under the action of pressure difference, and the rotating packing speed is adjusted to 2000rpm. The solution of rhodium-containing catalyst enters the liquid distributor 8 of the olefin hydroformylation reactor through the liquid inlet 3 and is sprayed to the inner side of the filler, and the gas and the liquid contact countercurrently in the upper packing layer 6 of the olef...

Embodiment 2

[0024] Attached figure 1 The shown device adopts the rhodium catalyst in Example 1 of the document CN200510085899.2 as the catalyst, and the olefin is selected from propylene, and in terms of total moles, the molar ratio of hydrogen: CO: propylene: Rh is 1: 1: 0.8: 0.2, the total amount of gas is 100m 3 / h, under the condition that the molar ratio of the first mixed gas of hydrogen, CO and propylene to the second mixed gas of hydrogen, CO and propylene is 30:1, the first mixed gas, the second mixed gas and the components containing liquid catalyst are respectively introduced in the high-efficiency reactor rotating packing layer 2 from the first gas inlet 1, the second gas inlet 10 and the liquid inlet 4, and the rotating packing layer rotating speed is adjusted to 500rpm, wherein the introduction of the first gas It is achieved by the pressure difference formed by the system. The liquid catalyst-containing component introduced through the liquid inlet line 5 merges with the...

Embodiment 3

[0026] Attached figure 1 The shown device adopts the rhodium catalyst in Example 2 of document CN 200910058201.6 as the catalyst, and the olefin is selected from butene, and the molar ratio of hydrogen: CO: butene: Rh is 1: 1: 0.7 in terms of total moles. : 0.2; under the condition that the molar ratio of the mixed gas of the first hydrogen, CO and butene to the mixed gas of the second hydrogen, CO and butene is 30:1, the first mixed gas, the second The mixed gas and the components containing liquid catalyst are respectively introduced into the high-efficiency reactor rotating packing layer 2 from the first gas inlet 1, the second gas inlet 10 and the liquid inlet 4, and the rotating packing layer speed is adjusted to 500rpm, wherein the first gas The introduction is achieved by the pressure difference formed by the system. The liquid catalyst-containing component introduced through the liquid inlet line 5 merges with the second gas introduced through the second gas inlet 10...

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Abstract

The invention relates to a method for preparing aldehyde through olefin hydrogen formylation and mainly solves the technical problems of low raw material conversion rate and low objective product selectivity in the reaction process of the olefin hydrogen formylation existing in the prior art. With the adoption of the technical scheme that the method for preparing the aldehyde through the olefin hydrogen formylation comprises the following steps that: C2-C8 olefin, CO and hydrogen are taken as raw materials, rhodium-contained liquid solution is taken as a catalyst, and under the conditions that the reaction temperature is 40-160 DEG C, the reaction pressure is 0.5-5.0 MPa, the molar ratio of olefin to rhodium is (0.5-30):1, the raw materials are in contact with the rhodium-contained liquid solution catalyst in a highly-efficient reactor for reaction to generate a liquid effluent containing the aldehyde, wherein the high-performance reactor selects a rotating packed bed reactor, so the problems are better solved. The method can be used in the industrial production for preparing the aldehyde through the olefin hydrogen formylation.

Description

technical field [0001] The invention relates to a method for preparing aldehydes by hydroformylation of olefins, in particular to a method for generating corresponding aldehydes by reacting olefins and synthesis gas (carbon monoxide and hydrogen) through a high-efficiency reactor under the action of a catalyst. Background technique [0002] Hydroformylation of olefins with carbon monoxide and hydrogen under the action of a catalyst [0003] [0004] Aldehydes can be hydrogenated to produce corresponding alcohols. The production capacity of synthesizing alcohol by this method in the world is in the millions of tons per year. Hydroformylation reaction of ethylene or propylene with carbon monoxide and hydrogen under the action of rhodium carbonyl catalyst to generate propionaldehyde or butyraldehyde, and further hydrogenation to generate propanol or butanol is one of the important chemical processes. [0005] The hydroformylation reactors currently used in industrial produ...

Claims

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Application Information

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IPC IPC(8): C07C45/50C07C47/02
Inventor 刘俊涛李蕾张琳娜
Owner CHINA PETROLEUM & CHEM CORP
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