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Method for preparing acrylonitrile dimer

A technology of acrylonitrile dimer and acrylonitrile, which is applied in the preparation of carboxylic acid nitrile, preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of reducing the yield of acrylonitrile dimer, and achieve the suppression of continuous side reactions , Improve the reuse rate, the effect of high yield

Pending Publication Date: 2021-08-13
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The distillation method separates the catalyst from the separation method by heating by utilizing the property that the phosphorus-based catalyst has a higher boiling point than the reactant or product, and when the catalyst is separated from the dimerization reactant by the distillation method, the acrylonitrile dimerization product is carried out by heating Continuous side reactions to produce acrylonitrile trimers, polymers, etc., thereby reducing the yield of acrylonitrile dimers

Method used

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  • Method for preparing acrylonitrile dimer
  • Method for preparing acrylonitrile dimer
  • Method for preparing acrylonitrile dimer

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preparation example Construction

[0024] According to the present invention, a preparation method of acrylonitrile dimer is provided. As the method for preparing the acrylonitrile dimer, a method for preparing the acrylonitrile dimer can be provided, comprising: supplying an acrylonitrile monomer, a phosphorus-based catalyst, and an alcohol solvent to a reactor for dimerization, thereby preparing a dimerization reaction body (S10); cooling the dimerization reaction body to crystallize the phosphorus-based catalyst (S20); isolating the crystallized phosphorus-based catalyst (S30); and separating the dimerization of the phosphorus-based catalyst The reactant is supplied to a distillation column to separate the acrylonitrile dimer (S40).

[0025] According to an exemplary embodiment of the present invention, in the step of preparing the acrylonitrile dimer, raw material components, products, etc. may be transported in the form of a stream. "Flow" may refer to the flow of fluid in a process, or may refer to the f...

Embodiment approach

[0059] According to an exemplary embodiment of the present invention, in the preparation method of the acrylonitrile dimer, distillation towers, condensers, reboilers, pumps, compressors, mixers, separators, etc. can also be installed as required .

[0060] Above, the preparation method of the acrylonitrile dimer according to the present invention has been described and shown in the accompanying drawings; however, the description and the illustration in the accompanying drawings are only descriptions and illustrations for understanding the core structure of the present invention. Out, and in addition to the processes and devices described above and shown in the accompanying drawings, processes and devices that are not separately described and shown can be suitably applied, and are used to carry out the process and device of the acrylonitrile dimer according to the present invention Preparation.

[0061] Hereinafter, the present invention will be described in more detail throu...

Embodiment 1

[0064] Such as figure 1 As shown in the process flow diagram shown in , 3 mL of acrylonitrile monomer (AN), 10 mL of isopropanol (IPA), and 5 mol% of the phosphorus-based monomer represented by the following chemical formula 2 relative to the acrylonitrile monomer A catalyst (Sigma-Aldrich, triphenylphosphine) was supplied into the reactor, and a dimerization reaction of acrylonitrile was carried out under normal pressure at a temperature of 60°C to obtain a dimerization reaction body (S10).

[0065] [chemical formula 2]

[0066]

[0067] Then, the dimerization reaction body was cooled to -38°C in the reactor to precipitate the phosphorus-based catalyst as a solid (S20).

[0068] Next, the phosphorus-based catalyst deposited as a solid in the dimerization reaction body is filtered using a filter (S30).

[0069] Next, the dimerization reaction body from which the phosphorus-based catalyst was separated was supplied to a distillation column, and the temperature of the dist...

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Abstract

The present invention provides a method for preparing acrylonitrile dimer, comprising: a step for producing a dimerization reactant by supplying an acrylonitrile monomer, a phosphorus-based catalyst, and an alcohol solvent to a reactor so as to perform a dimerization reaction (S10); a step for crystallizing the phosphorus-based catalyst by cooling the dimerization reactant (S20); a step for separating the crystallized phosphorus-based catalyst (S30); and a step for separating the acrylonitrile dimer by supplying, to a distillation column, the dimerization reactant from which the phosphorus-based catalyst has been separated (S40).

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2019-0165340 filed on December 12, 2019, the entire contents of which are incorporated herein as a part of this specification. technical field [0003] The present invention relates to a method for preparing an acrylonitrile dimer, and more particularly, to a method for preparing acrylonitrile with a high yield by effectively separating a phosphorus-based catalyst used as a catalyst. Background technique [0004] Acrylonitrile dimer, specifically, linear acrylonitrile dimer is used as an intermediate for synthesizing hexamethylenediamine (HMDA) which is the main monomer of nylon 66, or for preparing waterproofing agent, vulcanization accelerator and other intermediates. [0005] The acrylonitrile dimer can be obtained by dimerizing an acrylonitrile monomer in the presence of a catalyst. Specifically, acrylonitril...

Claims

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Application Information

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IPC IPC(8): C07C253/30C07C253/34C07C255/09B01J31/40B01J31/02
CPCC07C253/30C07C253/34B01J31/0267B01J31/40C07C255/09B01J31/0202B01J2231/20Y02P20/582Y02P20/52C07C253/32B01J31/0255C07C2527/14B01J31/4053
Inventor 安惟进吴完奎金知河郑贤哲朴世钦安贞宪
Owner LG CHEM LTD
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