Patents by Inventor Idris Mohamednur

Idris Mohamednur 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 purifying an organic acid
    Patent number: 6942803
    Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: September 13, 2005
    Assignee: A.E. Staley Manufacturing Co.
    Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel, Avraham M. Baniel
  • Process for purifying an organic acid
    Patent number: 6641734
    Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 4, 2003
    Assignee: A. E. Staley Manufacturing Co.
    Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel
  • Process for purifying an organic acid
    Publication number: 20030171615
    Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.
    Type: Application
    Filed: November 15, 2002
    Publication date: September 11, 2003
    Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel, Avraham M. Baniel
  • Process for purifying an organic acid
    Publication number: 20030155298
    Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.
    Type: Application
    Filed: January 3, 2002
    Publication date: August 21, 2003
    Applicant: A.E. Staley Manufacturing Co.
    Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel