A method and device for extracting 2-methyl-2-pentenal from propionaldehyde waste liquid
A technology of pentenal and methyl, which is applied in the field of extracting 2-methyl-2-pentenal, can solve the problems of enterprise resource waste, irritation, environmental pollution, etc., and achieve the reduction of waste liquid discharge, process Simple, the effect of reducing environmental pollution
Active Publication Date: 2016-04-27
南京荣欣化工有限公司
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Problems solved by technology
At the same time, 2-methyl-2-pentenal is highly toxic, flammable and irritating
[0004] In the existing propionaldehyde preparation process, the 2-methyl-2-pentenal condensed by propionaldehyde is mixed in the waste liquid and treated and discharged together with the waste liquid, which not only causes waste of resources to the enterprise, but also discharges Waste liquid also pollutes the environment
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Embodiment 1
[0024] Example 1: A device for extracting 2-methyl-2-pentenal from propionaldehyde waste liquid, comprising a filter device 1, an atmospheric rectification tower 3 and a condenser 5;
[0025] The inlet of the filter device 1 is connected to the waste liquid outlet, and the outlet of the filter device 1 is connected to the inlet of the atmospheric rectification tower 3 through a transport pipe; the top of the atmospheric rectification tower 3 is provided with a steam outlet 4 , the bottom of the tower is provided with a raffinate outlet, and the steam outlet 4 is connected to the inlet of the condenser 5 through a transport pipe; the outlet of the condenser 5 is connected to the inlet of the reflux device 6 through a transport pipe; the outlet of the reflux device 6 They are respectively connected with the product tank 7 and the atmospheric rectification tower 3 through transport pipes, and valves 8 are respectively arranged on the transport pipes;
[0026] The filter device ...
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The invention discloses a method for extracting 2-methyl-2-pentenal from propionaldehyde waste liquid. 2-Methyl-2-pentenal molecules are filtered out; (2) The filtered mixture is transported to the rectification tower, and the bottom of the rectification tower is heated to make the mixture form an azeotrope, and the gas phase is separated from the top of the tower (3) Condensate the gas phase material separated from the top of the tower into a liquid phase and transport it to the storage tank; (4) Detect the content of 2-methyl-2-pentenal in the liquid in the storage tank, The unqualified ones are transported back to the rectification tower, and the steps (2)~(3) are repeated; (5) the liquids that pass the content detection in step (4) are transported to the product tank to obtain the 2-methyl-2- Pentenal. The invention extracts 2-methyl-2-pentenal from the waste liquid produced by preparing propionaldehyde, which greatly reduces the production cost and does not cause waste of resources.
Description
technical field [0001] The invention relates to a method and a device for extracting 2-methyl-2-pentenal, in particular to a method and a device for extracting 2-methyl-2-pentenal from propionaldehyde waste liquid. Background technique [0002] Among the preparation methods of propionaldehyde, low-pressure carbonylation is the main method and development direction at present. In the preparation system of low-pressure carbonylation, propionaldehyde will be condensed to produce 2-methyl-2-pentenal. [0003] 2-Methyl-2-pentenal is an important intermediate in organic synthesis, such as the synthesis of strawberry acid. At the same time, 2-methyl-2-pentenal is highly toxic, flammable and irritating. [0004] In the existing propionaldehyde preparation process, the 2-methyl-2-pentenal condensed by propionaldehyde is mixed in the waste liquid and treated and discharged together with the waste liquid, which not only causes waste of resources to the enterprise, but also discharges ...
Claims
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IPC IPC(8): C07C45/78C07C47/21
CPCC07C45/78C07C47/21
Inventor 王涛贾露露李刚汤雯
Owner 南京荣欣化工有限公司