Patents by Inventor Werner Doetsch

Werner Doetsch 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: 8021609
    Abstract: A highly stabilized hydrogen peroxide useful for chemical sterilization of packaging materials in high-speed aseptic packaging plants.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: September 20, 2011
    Assignee: Solvay Chemicals GmbH
    Inventors: Werner Doetsch, Otmar Woost
  • Patent number: 7488439
    Abstract: Dust-free alkaline earth peroxides are obtained by mixing alkaline earth peroxides with a compacting aid and dry-compacted in a compactor, for example, a roller press. Examples of suitably useful compacting aids include sodium bicarbonate, cellulose, magnesium montanate and cross-linked silicone compounds.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: February 10, 2009
    Assignee: Solvay Chemicals GmbH
    Inventors: Werner Doetsch, Ernst Buchholz
  • Patent number: 7425228
    Abstract: Homogeneous, boron-doped alkaline earth peroxides and mixed alkaline earth peroxides, methods for the production thereof, and use thereof as oxygenating agents for agricultural purposes.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: September 16, 2008
    Assignee: Solvay Chemicals GmbH
    Inventors: Werner Doetsch, Gabriele Wasem
  • Publication number: 20050239679
    Abstract: Dust-free alkaline earth peroxides are obtained by mixing alkaline earth peroxides with a compacting aid and dry-compacted in a compactor, for example, a roller press. Examples of suitably useful compacting aids include sodium bicarbonate, cellulose, magnesium montanate and cross-linked silicone compounds.
    Type: Application
    Filed: April 18, 2005
    Publication date: October 27, 2005
    Applicant: Solvay Interox GmbH
    Inventors: Werner Doetsch, Ernst Buchholz
  • Publication number: 20040247755
    Abstract: A highly stabilized hydrogen peroxide useful for chemical sterilization of packaging materials in high-speed aseptic packaging plants.
    Type: Application
    Filed: March 19, 2004
    Publication date: December 9, 2004
    Applicant: Solvay Interox GmbH
    Inventors: Werner Doetsch, Otmar Woost
  • Publication number: 20040221632
    Abstract: Homogeneous, boron-doped alkaline earth peroxides and mixed alkaline earth peroxides, methods for the production thereof, and use thereof as oxygenating agents for agricultural purposes.
    Type: Application
    Filed: February 20, 2004
    Publication date: November 11, 2004
    Applicant: Solvay Interox GmbH
    Inventors: Werner Doetsch, Gabriele Wasem
  • Patent number: 6547490
    Abstract: Coated metal peroxides, their preparation and use, in which metal peroxides are coated with silicone compounds from selected from the group siliconates, hydrogen-polysiloxanes, siloxanes, silicone resin emulsions, silane/siloxane emulsions, silane/siloxane mixtures, silicone microemulsion concentrates, and silicic acid ester mixtures.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: April 15, 2003
    Assignee: Solvay Interox GmbH
    Inventors: Werner Doetsch, Gabriele Wasem
  • Publication number: 20020051744
    Abstract: Coated metal peroxides, their preparation and use, in which metal peroxides are coated with silicone compounds from selected from the group siliconates, hydrogen-polysiloxanes, siloxanes, silicone resin emulsions, silane/siloxane emulsions, silane/siloxane mixtures, silicone microemulsion concentrates, and silicic acid ester mixtures.
    Type: Application
    Filed: July 18, 2001
    Publication date: May 2, 2002
    Inventors: Werner Doetsch, Gabriele Wasem
  • Patent number: 6280495
    Abstract: A homogeneous calcium/magnesium peroxide, its manufacture and use are described. The new calcium/magnesium peroxide is suitable in particular as an additive used as source of oxygen and acid buffer, e.g. in the application, processing, treatment and/or disposal of various biomaterials.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: August 28, 2001
    Assignee: Solvay Interox GmbH
    Inventors: Werner Doetsch, Otto Caspar
  • Patent number: 6248707
    Abstract: A method for the “dry” production of sodium percarbonate (dry process), in which monohydrate crystals of sodium carbonate are reacted with a quasi-stoichiometric quantity of concentrated aqueous hydrogen peroxide solution, relative to the quantity of active oxygen required in the sodium percarbonate to be produced. This method can be combined to great advantage with subsequent compaction of the sodium percarbonate obtained. Sodium percarbonate products containing varying concentrations of active oxygen of at least 10 weight percent, particularly high active oxygen concentrations of above 14.5 weight percent, can be produced. The resulting sodium percarbonate products are distinguished in that they have remarkably advantageous dissolution rates, stabilities and compatibility with detergent bases, and are superior to conventional sodium percarbonates obtained, for example, by a crystallization process.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: June 19, 2001
    Assignee: Solvay Interox GmbH
    Inventors: Werner Doetsch, Manfred Mathes, Helmut Honig, Gabriele Wasem
  • Patent number: 6228342
    Abstract: A flexible process for production of homogeneous sodium precarbonate particles or granules according to which a reaction slurry with an average to high solids content is prepared initially from an aqueous hydrogen peroxide solution of up to maximum 50% by weight and solid soda, this reaction slurry, which optionally may be finely ground by wet comminution, being subsequently subjected immediately to short-term drying, preferably spray drying, and, optionally, granulation. The process enables production, in an efficient manner, of essentially homogeneous sodium percarbonate particles or granules with variable active oxygen contents of 10 to 14.5% by weight and grain sizes and bulk densities which are variable within wide ranges.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: May 8, 2001
    Assignee: Solvay Interox GmbH
    Inventors: Manfred Mathes, Werner Doetsch
  • Patent number: 6193776
    Abstract: A homogeneous calcium/magnesium peroxide, its manufacture and use are described. The new calcium/magnesium peroxide is suitable in particular as an additive used as source of oxygen and acid buffer, e.g. in the application, processing, treatment and/or disposal of various biomaterials.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: February 27, 2001
    Assignee: Solvay Interox GmbH
    Inventors: Werner Doetsch, Otto Caspar
  • Patent number: 5681807
    Abstract: The use of lactobionic acid, lactobionic acid salts and/or lactobionic acid derivatives as covering material is disclosed for coating alkali metal peroxy salts, in particular for coating sodium percarbonate. In an advantageous alternative of the invention, alkali metal peroxy salts are provided with a covering layer that contains as covering materials lactobionic acid and/or lactobionic acid salt mixed with boric acid and/or a boric acid salt as additional covering material. This coating stabilizes the alkali metal peroxy salts and protects them against humidity and decomposition. In another advantageous alternative, lactobionic acid, lactobionic acid salts and/or lactobionic acid derivatives are used in combination with or in particular mixed with an inorganic mineral salt mixture of alkali metal sulphate and alkali metal chloride as additional covering material for coating alkali metal peroxy salts, in particular for coating sodium percarbonate.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: October 28, 1997
    Assignee: Solvay Interox GmbH
    Inventors: Helmut Honig, Werner Doetsch, Manfred Mathes, Klaus-Guenter Gerling, Gerd Hecken
  • Patent number: 5478488
    Abstract: Particulate alkali metal peroxy salts are stabilized by coating with a crystallized mineral salt mixture of alkali metal sulfate and alkali metal chloride which optionally may additionally contain alkali metal silicate. Particularly suitable alkali metal peroxy salts include peroxypyrophosphate, peroxytripolyphosphate, peroxymonosulfate and peroxycarbonate. The coated peroxy salts are incorporated in bleaching and detergent compositions.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: December 26, 1995
    Assignee: Solvay Interox GmbH
    Inventors: Werner Doetsch, Manfred Mathes, Gerd Hecken
  • Patent number: 5399328
    Abstract: A process is described for preparing peroxyborate agglomerates having an active oxygen content of at least 14% by weight in which amorphous primary particles composed of peroxyborate prepared by a spray drying process are subjected to compacting pressing-agglomeration. Briquettes, compressed strips and tablets can be obtained which can be comminuted, if desired, to peroxyborate granules of desired particle size and bulk density. Advantageous, optionally colored, peroxyborate agglomerates, particularly peroxyborate granules are prepared. Preferred agglomerates and granules are composed of sodium peroxyborates.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: March 21, 1995
    Assignee: Peroxid-Chemie GmbH
    Inventors: Werner Doetsch, Richard Roesler, Werner Zeiss, Rudolf Siegel
  • Patent number: 5346680
    Abstract: Sodium percarbonate particles stabilized by being coated with a solid coating material which contains a mixture of sodium carbonate and sodium chloride, optionally together with one or more auxiliary agents used in the manufacture of sodium percarbonate.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: September 13, 1994
    Assignee: Solvay Interox GmbH
    Inventors: Richard Roesler, Alfred Soentgerath, Werner Doetsch, Gerd Hecken
  • Patent number: 5290476
    Abstract: A process for preparing microcrystalline perborate hydrate products and highly concentrated, storage stable aqueous solutions used for this purpose which have a stable active oxygen content and a boron content of 3 to 8% by wt. based on the total weight of the solution. The products of the invention are suitable for numerous uses in the field of bleaching agent, disinfectant and liquid detergent formulations, and other fields of use.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: March 1, 1994
    Assignee: Peroxid-Chemie GmbH
    Inventors: Richard Roesler, Werner Doetsch, Werner Zeiss, Rudolf Siegel
  • Patent number: 5244644
    Abstract: A process for producing an alkali metal carbonate peroxyhydrate having improved storage stability by mixing particles of an alkali metal carbonate peroxyhydrate with an effective storage stability improving amount of a powdered fatty acid metal salt.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: September 14, 1993
    Assignee: Peroxid-Chemie GmbH
    Inventor: Werner Doetsch
  • Patent number: 5203877
    Abstract: A process for producing sodium perborate monohydrate agglomerates or granules in which primary particles of sodium perborate monohydrate produced from sodium perborate tetrahydrate by a dehydration process are subjected to compacting pressing agglomeration, and the resulting agglomerates are subsequently comminuted to granules.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: April 20, 1993
    Assignee: Peroxid-Chemie GmbH
    Inventors: Werner Doetsch, Richard Roesler, Hans-Ludwig Pfeifer
  • Patent number: 4681748
    Abstract: Superoxidized sodium perborate with an active oxygen content of more than 16 wt. % and a specially adapted process for its preparation.
    Type: Grant
    Filed: February 11, 1986
    Date of Patent: July 21, 1987
    Assignee: Peroxid-Chemie GmbH
    Inventors: Werner Doetsch, Rudolf Siegel