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公开(公告)号：US20240262976A1
公开(公告)日：2024-08-08
申请号：US18564919
申请日：2022-02-18
Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
Inventor： Wataru MATSUBARA , Yoshio SEIKI , Minoru GENTA
CPC classification number: C08J11/24 , B01D3/143 , B01J19/0006 , B01J19/245 , C07C29/1285 , C07C51/09 , B01J2219/0004 , B01J2219/00184 , C08J2367/02
Abstract: To improve yield of monomers. A monomer production system includes a dissolving unit that stores therein a polyester solution, a first reaction unit into which the polyester solution and a reaction solvent are introduced and that depolymerizes the polyester in the polyester solution and extracts a first depolymerized polyester containing the depolymerized polyester into the reaction solvent, a second reaction unit that further depolymerizes the first depolymerized polyester and generates a second depolymerized polyester that is the further depolymerized first depolymerized polyester, a separation unit that separates the reaction solvent in which the second depolymerized polyester is dissolved into the reaction solvent, a carboxylic acid-derived monomer, an alcohol component monomer, and residual substances that are components other than the reaction solvent, the carboxylic acid-derived monomer, and the alcohol component monomer, and contain oligomers, and inlet pipes that introduce the carboxylic acid-derived monomer and the residual substances into the dissolving unit.
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公开(公告)号：US20240254308A1
公开(公告)日：2024-08-01
申请号：US18565006
申请日：2022-02-18
Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
Inventor： Wataru MATSUBARA , Minoru GENTA , Yoshio SEIKI , Kouji HORIZOE
IPC: C08J11/24
CPC classification number: C08J11/24 , C08J2367/02
Abstract: PET and foreign matter are properly separated. A separation system includes a storage unit configured to store therein a dissolved solution containing a PET solution in which polyethylene terephthalate is dissolved in a carboxylic acid-derived monomer and an impurity that is a component other than the polyethylene terephthalate, and separate the dissolved solution into the PET solution and the impurity by gravity, a discharge unit configured to discharge the separated impurity from an inside of the storage unit, and a reaction unit into which the separated PET solution and a reaction solvent reactive with polyethylene terephthalate are introduced and in which polyethylene terephthalate in the PET solution is depolymerized.
