Patents Assigned to EPC Engineering & Technologies GMBH
  • Patent number: 11945909
    Abstract: The invention relates to a method for producing a polycarbonate and the reaction of one or more diaryl carbonates with one or more aromatic compounds, wherein a catalyst combination is used in the process. The invention further relates to a catalyst combination and to the use thereof in a process for producing a polycarbonate.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: April 2, 2024
    Assignee: EPC Engineering & Technologies GMBH
    Inventor: Michael Streng
  • Publication number: 20190367669
    Abstract: The invention relates to a method for producing a polycarbonate and the reaction of one or more diaryl carbonates with one or more aromatic compounds, wherein a catalyst combination is used in the process. The invention further relates to a catalyst combination and to the use thereof in a process for producing a polycarbonate.
    Type: Application
    Filed: October 12, 2017
    Publication date: December 5, 2019
    Applicant: EPC Engineering & Technologies GMBH
    Inventor: Michael Streng
  • Publication number: 20190209946
    Abstract: A method is described for producing a polycarbonate by reacting one or more diaryl carbonates with one or more aromatic hydroxy compounds, which are first mixed in a mixing device and enter, as a raw material mixture, a raw material mixture container to subsequently react in one or more reactors under reduced pressure and increased temperature to form polycarbonate, wherein the mixture of diaryl carbonate and aromatic hydroxy compound is subjected to a purification by an inert gas in a countercurrent process, in a stripping device, before entering the raw material mixture container. The present invention also relates to a stripping device which is particularly suitable for purifying a raw material mixture stream, and to the use of such a stripping device in a method for producing polycarbonate.
    Type: Application
    Filed: August 11, 2017
    Publication date: July 11, 2019
    Applicant: EPC Engineering & Technologies GMBH
    Inventors: Michael Streng, Dieter Kloos, Malte Bracht