Patents by Inventor Erik Sluyts

Erik Sluyts has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250051646
    Abstract: The invention relates to a method for pyrolysis of polycarbonate-containing material in order to recover raw materials. The method comprises: (a) introducing material intended for the pyrolysis, at least comprising a polycarbonate-containing compound and an entire amount of phosphorous, organic compound, into a reactor, the entire amount relative to the entire weight of the material intended for pyrolysis having a ratio of at least 0.01 wt. % phosphor with a formal oxidation number of +5; (b) decomposing, at a temperature of 300° C. to 700° C., at least the material intended for pyrolysis introduced into the reactor in step (a) and obtaining a product that is present in the gaseous phase as the pyrolysate and of pyrolysis residues that are present in a non-gaseous phase; (c) cooling the removed pyrolysate to a temperature of less than 300° C. while obtaining a pyrolysis product, selected from pyrolysis condensate, pyrolysis sublimate or a mixture thereof.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 13, 2025
    Inventors: Stefanie Eiden, Erik Sluyts, Rainer Bellinghausen, Andreas Seidel
  • Publication number: 20250034350
    Abstract: The invention relates to a process for recovery of rubber-modified vinyl(co)polymer from a polycarbonate resin or an optionally shredded molded part made thereof and the use of the recovered rubber-modified vinyl(co)polymer for the production of molded parts as well as blend partner in polycarbonate blends. Further optional aspects are the recovery of aromatic and/or aliphatic diol and the use of this diol for the production of polycarbonates.
    Type: Application
    Filed: December 9, 2022
    Publication date: January 30, 2025
    Inventors: Ivan Sluijs, Erik Sluyts, Johan Vanden Eynde, Kristof Heylen, Marina Reithmeier, Sven Hobeika
  • Publication number: 20240425665
    Abstract: A method for pyrolysis of polycarbonate-containing material in order to recover raw materials is provided. The method comprises at least the following steps: (a) introducing material intended for the pyrolysis, at least comprising material that contains a mixture of a polycarbonate-containing compound and a polystyrene-containing compound, into a reactor; (b) decomposing, at a temperature of 300° C. to 700° C., at least the material intended for pyrolysis introduced into the reactor in step (a) and obtaining a product that is present in the gaseous phase as the pyrolysate and of pyrolysis residues that are present in a non-gaseous phase; and (c) cooling the removed pyrolysate to a temperature of less than 300° C. while obtaining a pyrolysis product, selected from pyrolysis condensate, pyrolysis sublimate or a mixture thereof.
    Type: Application
    Filed: December 22, 2021
    Publication date: December 26, 2024
    Inventors: Stefanie Eiden, Rainer Bellinghausen, Aurel Wolf, Erik Sluyts, Jonas Krause, Andreas Seidel
  • Publication number: 20240294452
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: September 5, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20240116839
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of acetophenone without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: April 11, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20240109831
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of benzene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: April 4, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20240076257
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of 2-methyl benzofuran without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is neither covalently nor ionically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: March 7, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20240076256
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of alpha-methylstyrene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: March 7, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20240059639
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of at least two impurities being selected from the group consisting of 2-methylbenzofurane, hydroxyacetone, alpha-methylstyrene, acetophenone, benzene and/or cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is not chemically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate.
    Type: Application
    Filed: February 16, 2022
    Publication date: February 22, 2024
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Patent number: 11420918
    Abstract: The invention relates to a method for producing a specific hydroxyl compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the absence of a catalyst and to a method for producing a bisphenol.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: August 23, 2022
    Assignee: Covestro Intellectual Property GMBH & Co. KG
    Inventors: Niklas Meine, Erik Sluyts, Jan Heijl
  • Publication number: 20220259124
    Abstract: The present invention relates to a process for preparing bisphenol A in the presence of hydroxyacetone without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is not chemically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate and a composition comprising bisphenol A and at least one specific impurity which is formed in the production of bisphenol A.
    Type: Application
    Filed: August 24, 2020
    Publication date: August 18, 2022
    Inventors: Jerico Jayson Uy, Erik Sluyts
  • Publication number: 20220017442
    Abstract: The invention relates to a method for producing a specific hydroxy compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the presence of a Bronsted base. The invention also relates to a method for producing a diaryl carbonate or a bisphenol, to a method for producing a polycarbonate and to a use of a Bronsted base during the reaction of the decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound.
    Type: Application
    Filed: December 2, 2019
    Publication date: January 20, 2022
    Inventors: Jens Langanke, Erik Sluyts, Jan Heijl, Niklas Meine
  • Publication number: 20210395177
    Abstract: The invention relates to a method for producing a specific hydroxyl compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the absence of a catalyst and to a method for producing a bisphenol.
    Type: Application
    Filed: December 2, 2019
    Publication date: December 23, 2021
    Inventors: Niklas Meine, Erik Sluyts, Jan Heijl
  • Publication number: 20210340089
    Abstract: The present invention relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol (BP-TMC). Especially, the present invention relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol (BP-TMC) from 3,3,5-trimethylcyclohexanone (TMC-one) and phenol in the presence of a gaseous acidic catalyst. The preparation is preferably conducted continuously. It is an object of the present invention to prevent that solids, especially crystallized BP-TMC, more especially crystallized BP-TMC-phenol-adduct, block the outlet of the dosing valve for the gaseous acidic acid when the gaseous acidic acid is dosed into the reaction mixture comprising TMC-one and phenol in a reaction vessel.
    Type: Application
    Filed: August 15, 2019
    Publication date: November 4, 2021
    Inventors: Johan Vanden Eynde, Erik Sluyts, Kristof Heylen, Michael Traving, Volker Michele
  • Patent number: 11149116
    Abstract: The present invention relates to a process for producing a polycarbonate from a diphenol or two or more different diphenols and a carbonyl halide by the interfacial process. It is a feature of the process according to the invention that it is carried out on the basis of a chlorohydrocarbon or a mixture of a mixture of two or more chlorohydrocarbons using an organic solvent. An organic solvent is also provided.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: October 19, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Jan Heijl, Erik Sluyts, Xiaoxin Yao
  • Publication number: 20210163679
    Abstract: The present invention relates to a process for producing a polycarbonate from a diphenol or two or more different diphenols and a carbonyl halide by the interfacial process. It is a feature of the process according to the invention that it is carried out on the basis of a chlorohydrocarbon or a mixture of a mixture of two or more chlorohydrocarbons using an organic solvent. An organic solvent is also provided.
    Type: Application
    Filed: December 12, 2018
    Publication date: June 3, 2021
    Inventors: Jan Heijl, Erik Sluyts, Xiaoxin Yao
  • Patent number: 10370491
    Abstract: The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: August 6, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Ivan Sluijs, Jan Heijl, Erik Sluyts, Frank Bruynseels
  • Publication number: 20170369642
    Abstract: The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.
    Type: Application
    Filed: January 20, 2016
    Publication date: December 28, 2017
    Inventors: Ivan Sluijs, Jan Heijl, Erik Sluyts, Frank Bruynseels
  • Patent number: 9771290
    Abstract: The present invention provides a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein (i) the alkaline waste water is heated to a temperature of from 150° C. to 500° C. under an increased pressure with respect to atmospheric pressure with exclusion of oxygen; (ii) a base is added to the waste water obtained in (i); and (iii) the waste water obtained in (ii) is purified further by stripping with a stripping gas and the stripping gas stream loaded with impurities is then cooled to a temperature of from 10° C. to 60° C.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: September 26, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Knauf, Antoni Mairata, Erik Sluyts, Jan Van Tricht
  • Patent number: 9771291
    Abstract: The invention relates to a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein (i) the alkaline waste water is heated under an increased pressure with respect to atmospheric pressure with exclusion of oxygen and is then cooled and expanded; (ii) the waste water obtained in (i) is purified further by stripping with a stripping gas and the stripping gas stream loaded with impurities is then cooled to a temperature of from 10° C. to 60° C.; and (iii) the liquid process product obtained in (ii) by cooling the stripping gas stream loaded with impurities is separated into an aqueous and an organic phase and the organic phase is used further in an aniline production process.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: September 26, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Knauf, Antoni Mairata, Erik Sluyts, Jan Van Tricht