Patents by Inventor Roelf Otto

Roelf Otto 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).

  • Process for the preparation of lactic acid or lactate from a magnesium lactate comprising medium
    Patent number: 7705180
    Abstract: The present invention relates to an improved process for the preparation of lactic acid and or lactate from a magnesium lactate comprising medium. In said process, magnesium lactate is reacted with a hydroxide of sodium, calcium, and/or ammonium at a pH range between 9 and 12, preferably between 9.9 and 11, to form a lactate of sodium, potassium, calcium and/or ammonia and magnesium hydroxide. With the process according to the invention a lactate salt is formed and magnesium hydroxide. It is essential that said so-called SWAP reaction is conducted within a specific pH range: It was found that when conducting the SWAP reaction at a pH range between 9 and 12 magnesium hydroxide particles are formed which can easily be separated from the lactate salt solution formed.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: April 27, 2010
    Assignee: Purac Biochem B.V.
    Inventors: Jan van Krieken, Roelf Otto, Gerrit Leendert Nanninga, Johannes Jeichinus de Vries
  • Antimicrobial preparations
    Publication number: 20070237756
    Abstract: The invention pertains to a method for preserving food against Gram-negative bacteria comprising adding to the food an antimicrobial preparation comprising glycine and alanine. The invention further relates to the use of said antimicrobial preparations for controlling intestinal flora in humans and animals.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 11, 2007
    Applicant: PURAC BIOCHEM B.V.
    Inventors: Roelf Otto, Aldana Ramirez
  • Process for the preparation of lactic acid or lactate from a magnesium lactate comprising medium
    Publication number: 20050281913
    Abstract: The present invention relates to an improved process for the preparation of lactic acid and or lactate from a magnesium lactate comprising medium. In said process, magnesium lactate is reacted with a hydroxide of sodium, calcium, and/or ammonium at a pH range between 9 and 12, preferably between 9.9 and 11, to form a lactate of sodium, potassium, calcium and/or ammonia and magnesium hydroxide. With the process according to the invention a lactate salt is formed and magnesium hydroxide. It is essential that said so-called SWAP reaction is conducted within a specific pH range: It was found that when conducting the SWAP reaction at a pH range between 9 and 12 magnesium hydroxide particles are formed which can easily be separated from the lactate salt solution formed.
    Type: Application
    Filed: June 16, 2005
    Publication date: December 22, 2005
    Applicant: Purac Biochem BV
    Inventors: Jan van Krieken, Roelf Otto, Gerrit Nanninga, Johannes de Vries