Patents by Inventor Velichka Yordanova Koleva

Velichka Yordanova Koleva 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).

  • Method for improved reactive monomer production with membrane filtration
    Patent number: 10532320
    Abstract: The present invention relates to production processes for reactive monomer species. The method described herein may be used in a variety of reactive monomer production processes to optimize the use of polymerization inhibitor compounds, which may lead to further advantages such as debottlenecking or elimination of process plant separation unit(s). The method provides for the separation of oligomeric/polymeric species, inhibitor compounds and reactive monomer, optionally in the presence of unreacted raw materials or solvent(s), within the production process by means of membrane filtration, particularly through the use of solvent stable membranes, and in particular by applying organic solvent nanofiltration membranes.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: January 14, 2020
    Assignee: Evonik Degussa GmbH
    Inventors: Andrew Boam, Yuri Bouwhuis, Phillip R. James, Velichka Yordanova Koleva, Felix Nissen
  • METHOD FOR IMPROVED REACTVE MONOMER PRODUCTION WITH MEMBRANE FILTRATION
    Publication number: 20180361319
    Abstract: The present invention relates to production processes for reactive monomer species. The method described herein may be used in a variety of reactive monomer production processes to optimise the use of polymerisation inhibitor compounds, which may lead to further advantages such as debottlenecking or elimination of process plant separation unit(s). The method provides for the separation of oligomeric/polymeric species, inhibitor compounds and reactive monomer, optionally in the presence of unreacted raw materials or solvent(s), within the production process by means of membrane filtration, particularly through the use of solvent stable membranes, and in particular by applying organic solvent nanofiltration membranes.
    Type: Application
    Filed: September 22, 2015
    Publication date: December 20, 2018
    Applicant: Evonik Degussa GmbH
    Inventors: Andrew BOAM, Yuri BOUWHUIS, Phillip R. JAMES, Velichka Yordanova KOLEVA, Felix NISSEN
  • Method for producing vitamin E-enriched, especially tocotrienol-enriched, compositions from natural oils
    Patent number: 10017712
    Abstract: The present disclosure relates generally to a process for manufacturing products enriched in the content of at least one vitamin E component, preferably tocotrienol, using solvent extraction and membrane filtration.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: July 10, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Andrew Boam, Yuri Bouwhuis, Velichka Yordanova Koleva, Maria Ines Fontes Rocha, Michael Schwarm
  • METHOD FOR PRODUCING VITAMIN E-ENRICHED, ESPECIALLY TOCOTRIENOL-ENRICHED, COMPOSITIONS FROM NATURAL OILS
    Publication number: 20170166837
    Abstract: The present disclosure relates generally to a process for manufacturing products enriched in the content of at least one vitamin E component, preferably tocotrienol, using solvent extraction and membrane filtration.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 15, 2017
    Inventors: Andrew Boam, Yuri Bouwhius, Velichka Yordanova Koleva, Maria Ines Fontes Rocha, Michael Schwarm
  • Membrane-based processes for reducing at least one impurity and making a concentrate comprising at least one natural component from a non-marine fatty acid oil mixture, and compositions resulting thereof
    Patent number: 9309483
    Abstract: The present disclosure relates generally to processes for reducing impurities and separating natural components from a non-marine fatty acid oil mixture using at least one selective membrane, and compositions thereof.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: April 12, 2016
    Assignee: EVONIK MEMBRANE EXTRACTION TECHNOLOGY LTD.
    Inventors: Andrew Boam, Henrik Fismen, Velichka Yordanova Koleva, Fui Wen Lim, Maria Ines Fontes Rocha, Sverre Sondbo, Eddy G. Torp
  • MEMBRANE-BASED PROCESSES FOR REDUCING AT LEAST ONE IMPURITY AND MAKING A CONCENTRATE COMPRISING AT LEAST ONE NATURAL COMPONENT FROM A NON-MARINE FATTY ACID OIL MIXTURE, AND COMPOSITIONS RESULTING THEREOF
    Publication number: 20140296549
    Abstract: The present disclosure relates generally to processes for reducing impurities and separating natural components from a non-marine fatty acid oil mixture using at least one selective membrane, and compositions thereof.
    Type: Application
    Filed: November 8, 2012
    Publication date: October 2, 2014
    Applicant: EVONIK MEMBRANE EXTRACTION TECHNOLOGY LTD.
    Inventors: Andrew Boam, Henrik Fismen, Velichka Yordanova Koleva, Fui Wen Lim, Maria Ines Fontes Rocha, Sverre Sondbo, Eddy G. Torp