US 12,404,234 B2
Method of producing acrylonitrile dimer
Sae Hume Park, Daejeon (KR); Ji Ha Kim, Daejeon (KR); Yu Jin An, Daejeon (KR); Wan Kyu Oh, Daejeon (KR); Hyun Chul Jung, Daejeon (KR); and Jeong Heon Ahn, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/292,951
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 14, 2020, PCT No. PCT/KR2020/013977
§ 371(c)(1), (2) Date May 11, 2021,
PCT Pub. No. WO2021/096075, PCT Pub. Date May 20, 2021.
Claims priority of application No. 10-2019-0143198 (KR), filed on Nov. 11, 2019; and application No. 10-2020-0125786 (KR), filed on Sep. 28, 2020.
Prior Publication US 2022/0306571 A1, Sep. 29, 2022
Int. Cl. C07C 253/30 (2006.01); C07C 253/34 (2006.01)
CPC C07C 253/30 (2013.01) [C07C 253/34 (2013.01)] 13 Claims
 
1. A method of producing an acrylonitrile dimer, the method comprising:
feeding an acrylonitrile monomer, a nonpolar solvent, an alcohol solvent, and a phosphorus-based catalyst to a dimerization reactor to perform a dimerization reaction and feeding a reaction product to a distillation column;
feeding the acrylonitrile monomer, the nonpolar solvent, and the alcohol solvent partially or entirely separated from the distillation column to the dimerization reactor;
and feeding an acrylonitrile dimer and the phosphorus-based catalyst separated from the distillation column to an extraction device;
oxidizing the phosphorus-based catalyst by feeding water including an acid component to the extraction device to inactivate the phosphorus-based catalyst; and
separating the inactivated phosphorus-based catalyst and the acrylonitrile dimer.