Patents by Inventor Manfred Stepanski

Manfred Stepanski 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).

  • Patent number: 10745332
    Abstract: A process for purifying a crude composition includes a monoterpene compound selected from the group consisting of monocyclic monoterpene alcohols, monocyclic monoterpene ketones, bicyclic epoxy monoterpenes and mixtures of two or more of the aforementioned compounds, such as preferably a monocyclic monoterpene alcohol. The process comprises performing a layer crystallization with a melt of the crude composition, and the melt of the crude composition subjected to the layer crystallization includes oxygen-containing solvent in a concentration of 20 ppm to 2% by weight. The oxygen-containing solvent is selected from the group consisting of water, C1-6-alcohols, C1-6-carboxylic acids, C1-6-ketones, C1-6-aldehydes, C1-12-ethers, C1-12-esters and mixtures of two or more of the aforementioned solvents.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 18, 2020
    Assignee: SULZER MANAGEMENT AG
    Inventors: Manfred Stepanski, Florian Lippuner, Hans-Peter Brack
  • Publication number: 20200071249
    Abstract: A process for purifying a crude composition includes a monoterpene compound selected from the group consisting of monocyclic monoterpene alcohols, monocyclic monoterpene ketones, bicyclic epoxy monoterpenes and mixtures of two or more of the aforementioned compounds, such as preferably a monocyclic monoterpene alcohol. The process comprises performing a layer crystallization with a melt of the crude composition, and the melt of the crude composition subjected to the layer crystallization includes oxygen-containing solvent in a concentration of 20 ppm to 2% by weight. The oxygen-containing solvent is selected from the group consisting of water, C1-6-alcohols, C1-6-carboxylic acids, C1-6-ketones, C1-6-aidehydes, C1-12-ethers, C1-12-esters and mixtures of two or more of the aforementioned solvents.
    Type: Application
    Filed: April 13, 2018
    Publication date: March 5, 2020
    Inventors: Manfred STEPANSKI, Florian LIPPUNER, Hans-Peter BRACK
  • Publication number: 20190338461
    Abstract: The present invention is directed to dye mixtures comprising structures of formula and their production and their use for dyeing textiles and in particular for dyeing aramid fibres.
    Type: Application
    Filed: December 7, 2017
    Publication date: November 7, 2019
    Inventors: ADRIAN MURGATROYD, Manfred HOPPE, Clemens GRUND, Brian CONNOLLY, Thomas STEPANSKI
  • Patent number: 10301475
    Abstract: The invention relates to mixtures of fiber-reactive Triphendioxazine dyes with other fiber-reactive azo dyes and their use for the dyeing of hydroxyl- and especially carboxamide-containing material in blue and navy shades.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: May 28, 2019
    Assignee: DryStar Colours Distribution GmbH
    Inventors: Adrian Murgatroyd, Manfred Hoppe, Clemens Grund, Brian Connolly, Thomas Stepanski
  • Patent number: 10118836
    Abstract: A process for desalinating water is disclosed. The process comprises the steps of passing a feed stream of saline solution 2? in a first desalination step through a reverse osmosis membrane desalination plant 3? comprising at least one reverse osmosis desalination unit 4? to form a first product water stream 5? having a reduced salt concentration relative to that of the feed stream of saline solution 2? and a first byproduct stream 6? having an increased salt concentration relative to that of the feed stream of saline solution 2? characterized in that the first byproduct stream 6? is passed in a second desalination step through a falling film crystallization unit 7 to form a second product water stream 8 having a reduced salt concentration relative to that of the first byproduct stream 6? and a second byproduct stream 9 having an increased salt concentration relative to that of the first byproduct stream 6?. The invention further relates to an apparatus 1 for carrying out said process.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: November 6, 2018
    Assignee: Sulzer Chemtech AG
    Inventors: Severine Dette, Mansour M. M. Ahmad, Manfred Stepanski
  • Patent number: 10112886
    Abstract: The present invention relates to a method for purifying a crude benzoic acid (32) containing 5 to 20% by weight of byproducts and 80 to 95% by weight of benzoic acid, by means of distillation, wherein the distillation is performed in a plant comprising a first distillation system (54), which comprises a divided wall column (10).
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: October 30, 2018
    Assignee: Sulzer Chemtech AG
    Inventors: Peter Faessler, Manfred Stepanski
  • Patent number: 10058795
    Abstract: The invention relates to a process for purification of a stream containing a cyclic ester of an alpha-hydroxycarboxylic acid of formula (I), wherein each R independently represents hydrogen or an aliphatic hydrocarbon having 1 to 6 carbon atoms comprising the steps of: (a) separating the cyclic ester-containing stream into one or more cyclic ester-containing vapor fractions and one or more cyclic ester-containing liquid fractions; (b) condensing a cyclic ester-containing vaporized fraction as obtained in step (a) to obtain a cyclic ester-containing condensate; (c) subjecting at least part of the cyclic ester-containing condensate as obtained in step (b) to melt crystallization to obtain a purified cyclic ester-containing stream and a residue stream; and (d) recovering the purified cyclic ester-containing stream as obtained in step (c). The invention further relates to an apparatus suitable for carrying out the present process.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: August 28, 2018
    Assignees: Sulzer Chemtech AG, Futerro S.A.
    Inventors: Manfred Stepanski, Peter Fässler, Philippe Coszach
  • Publication number: 20180179121
    Abstract: A process for the separation of a substance from a liquid feed mixture and for the purification of the substance by fractional layer crystallization, wherein the liquid feed mixture comprises the substance to be separated and purified in a concentration of less than 50% by weight, which comprises the subsequent steps in the given order: (a) feeding the liquid feed mixture into a crystallization zone, in which at least one surface is provided, so that at least a part of the surface contacts the liquid feed mixture, (b) cooling the at least one surface of the crystallization zone to a temperature below the equilibrium freezing temperature of the liquid feed mixture so that a crystal layer enriched in the substance to be separated and purified is deposited on the at least one cooled surface, whereby a mother liquid having a lower concentration of the substance to be separated and purified than the liquid feed mixture is formed from the liquid feed mixture, (c) removing at least a portion of the mother liquid fro
    Type: Application
    Filed: June 16, 2016
    Publication date: June 28, 2018
    Applicant: Sulzer Chemtech AG
    Inventors: Mathias Pfeil, Manfred Stepanski
  • Patent number: 9688548
    Abstract: A process for desalinating water is disclosed. The process comprises the steps of passing a feed stream of saline solution 2? in a first desalination step through a reverse osmosis membrane desalination plant 3? comprising at least one reverse osmosis desalination unit 4? to form a first product water stream 5? having a reduced salt concentration relative to that of the feed stream of saline solution 2? and a first byproduct stream 6? having an increased salt concentration relative to that of the feed stream of saline solution 2? characterized in that the first byproduct stream 6? is passed in a second desalination step through a suspension crystallization unit 7 to form a second product water stream 8 having a reduced salt concentration relative to that of the first byproduct stream 6? and a second byproduct stream 9 having an increased salt concentration relative to that of the first byproduct stream 6?. The invention further relates to an apparatus 1 for carrying out said process.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: June 27, 2017
    Assignee: Sulzer Chemtech AG
    Inventors: Severine Dette, Mansour M. M Ahmad, Manfred Stepanski
  • Patent number: 9637587
    Abstract: Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: May 2, 2017
    Assignee: Sulzer Chemtech AG
    Inventors: Manfred Stepanski, Francois Loviat, Andrzej Kuszlik
  • Publication number: 20170107167
    Abstract: The present invention relates to a method for purifying a crude benzoic acid (32) containing 5 to 20% by weight of byproducts and 80 to 95% by weight of benzoic acid, by means of distillation, wherein the distillation is performed in a plant comprising a first distillation system (54), which comprises a divided wall column (10).
    Type: Application
    Filed: May 20, 2015
    Publication date: April 20, 2017
    Applicant: Sulzer Chemtech AG
    Inventors: Peter FAESSLER, Manfred STEPANSKI
  • Publication number: 20160024043
    Abstract: The invention relates to a process for purification of a stream containing a cyclic ester of an alpha-hydroxycarboxylic acid of formula (I), wherein each R independently represents hydrogen or an aliphatic hydrocarbon having 1 to 6 carbon atoms comprising the steps of: (a) separating the cyclic ester-containing stream into one or more cyclic ester-containing vapour fractions and one or more cyclic ester-containing liquid fractions; (b) condensing a cyclic ester-containing vaporized fraction as obtained in step (a) to obtain a cyclic ester-containing condensate; (c) subjecting at least part of the cyclic ester-containing condensate as obtained in step (b) to melt crystallization to obtain a purified cyclic ester-containing stream and a residue stream; and (d) recovering the purified cyclic ester-containing stream as obtained in step (c). The invention further relates to an apparatus suitable for carrying out the present process.
    Type: Application
    Filed: February 4, 2014
    Publication date: January 28, 2016
    Applicants: Futerro S.A., Sulzer Chemtech AG
    Inventors: Manfred Stepanski, Peter Fässler, Philippe Coszach
  • Publication number: 20150210562
    Abstract: A process for desalinating water is disclosed. The process comprises the steps of passing a feed stream of saline solution 2? in a first desalination step through a reverse osmosis membrane desalination plant 3? comprising at least one reverse osmosis desalination unit 4? to form a first product water stream 5? having a reduced salt concentration relative to that of the feed stream of saline solution 2? and a first byproduct stream 6? having an increased salt concentration relative to that of the feed stream of saline solution 2? characterized in that the first byproduct stream 6? is passed in a second desalination step through a falling film crystallization unit 7 to form a second product water stream 8 having a reduced salt concentration relative to that of the first byproduct stream 6? and a second byproduct stream 9 having an increased salt concentration relative to that of the first byproduct stream 6?. The invention further relates to an apparatus 1 for carrying out said process.
    Type: Application
    Filed: February 13, 2013
    Publication date: July 30, 2015
    Inventors: Severine Dette, Mansour M.M Ahmad, Manfred Stepanski
  • Publication number: 20150203373
    Abstract: A process for desalinating water is disclosed. The process comprises the steps of passing a feed stream of saline solution 2? in a first desalination step through a reverse osmosis membrane desalination plant 3? comprising at least one reverse osmosis desalination unit 4? to form a first product water stream 5? having a reduced salt concentration relative to that of the feed stream of saline solution 2? and a first byproduct stream 6? having an increased salt concentration relative to that of the feed stream of saline solution 2? characterized in that the first byproduct stream 6? is passed in a second desalination step through a suspension crystallization unit 7 to form a second product water stream 8 having a reduced salt concentration relative to that of the first byproduct stream 6? and a second byproduct stream 9 having an increased salt concentration relative to that of the first byproduct stream 6?. The invention further relates to an apparatus 1 for carrying out said process.
    Type: Application
    Filed: February 13, 2013
    Publication date: July 23, 2015
    Inventors: Severine Dette, Mansour M.M Ahmad, Manfred Stepanski
  • Publication number: 20150166721
    Abstract: Disclosed is a method to prepare a polylactic acid comprising the steps of: performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of condensing the evaporated gas phase stream to give a condensed stream and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is polymerized by feeding it back into the ring opening polymerization.
    Type: Application
    Filed: February 26, 2015
    Publication date: June 18, 2015
    Inventors: Manfred Stepanski, Francois Loviat, Andrzej Kuszlik
  • Publication number: 20130331543
    Abstract: Disclosed is a method to prepare a polylactic acid comprising the steps of: performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of condensing the evaporated gas phase stream to give a condensed stream and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is polymerized by feeding it back into the ring opening polymerization.
    Type: Application
    Filed: November 15, 2011
    Publication date: December 12, 2013
    Applicant: SULZER CHEMTECH AG
    Inventors: Manfred Stepanski, Francois Loviat, Andrzej Kuszlik
  • Publication number: 20130324697
    Abstract: Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization.
    Type: Application
    Filed: November 15, 2011
    Publication date: December 5, 2013
    Applicant: SULZER CHEMTECH AG
    Inventors: Manfred Stepanski, Francois Loviat, Andrzej Kuszlik
  • Patent number: 8333809
    Abstract: The present invention relates to a method for the purification of an ionic liquid by means of fractional crystallization in which a part of the ionic liquid is crystallized and the crystallizate formed is separated from the liquid remainder. In this respect the ionic liquid is charged with a certain amount of at least one entrainer substance.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: December 18, 2012
    Assignee: Sulzcr Chemtech AG
    Inventors: Axel König, Manfred Stepanski, Andrzej Kuszlik
  • Publication number: 20110259043
    Abstract: The present invention relates to a method of purifying an ionic liquid by means of fractional crystallization in which a part of the ionic liquid is crystallized and the crystals formed are separated off from the residual liquid. In this process a certain amount of at least one entrainer substance is added to the ionic liquid.
    Type: Application
    Filed: September 12, 2007
    Publication date: October 27, 2011
    Inventors: Axel König, Manfred Stepanski, Andrzej Kuszlik
  • Patent number: 6145340
    Abstract: In the process according to the invention for fractionating substances, particularly paraffins, oils, fats and waxes, which, when crystallized, have poor adhesion to the substantially vertical crystallization surfaces (39) of a crystallizer, screen-like supporting structures, e.g. perforated metal sheets (31) bent in a zig-zag, are disposed between the crystallization surfaces (39) of a crystallizer. The crystals (51) becoming detached from the crystallization surfaces (39) during the sweating phase are left suspended in horizontal strips in the triangular zones (41) on the perforated sheet (31) and remain in thermal contact with the crystallization surface (39) and sweat out the liquid phase (55). The mother liquor (55) drips off, in some cases also between the crystals (51) and the crystallization surface (39), with the result that drip channels are melted by the heated mother liquor and thus opened.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: November 14, 2000
    Assignee: Sulzer Chemtech AG
    Inventors: Manfred Stepanski, Bernhard J. Jans