Patents by Inventor Robert B. Weisenfeld

Robert B. Weisenfeld 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: 9394173
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: July 19, 2016
    Assignee: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Fuchen Liu, Chen-Hsyong Yang
  • Publication number: 20140234196
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Application
    Filed: January 21, 2014
    Publication date: August 21, 2014
    Applicant: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Fuchen Liu, Chen-Hsyong Yang
  • Patent number: 8669396
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: March 11, 2014
    Assignee: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld
  • Patent number: 8344178
    Abstract: The present invention generally relates to processes for producing and recovering cyclitolcarboxylic acids such as shikimic acid and quinic acid. In particular, the present invention is directed to processes for producing shikimic acid that comprise contacting glyphosate and an organism that has the common aromatic biosynthetic pathway. The present invention is also directed to recovery of the shikimic acid product from aqueous process streams utilizing membrane separation techniques.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: January 1, 2013
    Assignee: Monsanto Technology LLC
    Inventors: Sunder Rangachari, Todd C. Friedman, Greg Hartmann, Robert B. Weisenfeld
  • Publication number: 20120100051
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Application
    Filed: May 13, 2010
    Publication date: April 26, 2012
    Applicant: MONSANTO TECHNOLOGY LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, Fuchen Liu, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Chen-Hsyong Yang
  • Publication number: 20100298599
    Abstract: The present invention generally relates to processes for producing and recovering cyclitolcarboxylic acids such as shikimic acid and quinic acid. In particular, the present invention is directed to processes for producing shikimic acid that comprise contacting glyphosate and an organism that has the common aromatic biosynthetic pathway.
    Type: Application
    Filed: October 16, 2008
    Publication date: November 25, 2010
    Applicant: MONSANTO TECHNOLOGY LLC
    Inventors: Sunder Rangachari, Todd C. Friedman, Greg Hartmann, John W. Hemminghaus, Keith A. Kretzmer, Nicholas J. Nissing, Robert B. Weisenfeld
  • Patent number: 7064235
    Abstract: This invention is directed to a process for making an iminodiacetic acid compound from a monoethanolamine substrate having the formula: wherein R1 is hydrogen, hydrocarbyl, or substituted hydrocarbyl. The process includes a series of reactions comprising a cyanomethylation, a hydrolysis and a dehydrogenation. In a particular embodiment, the iminodiacetic acid produced is disodium iminodiacetic acid and the monoethanolamine substrate used is 2-aminoethanol.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: June 20, 2006
    Assignee: Monsanto Technology LLC
    Inventors: Howard C. Berk, Thaddeus S. Franczyk, II, Robert B. Weisenfeld, David A. Morgenstern, Juan P. Arhancet, William L. Moench, Jr., James C. Peterson
  • Publication number: 20030176735
    Abstract: This invention is directed to a process for making an iminodiacetic acid compound from a monoethanolamine substrate having the formula: 1
    Type: Application
    Filed: February 3, 2003
    Publication date: September 18, 2003
    Applicant: Monsanto Technology LLC
    Inventors: Howard C. Berk, Thaddeus S. Franczyk, Robert B. Weisenfeld, David A. Morgenstern, Juan P. Arhancet, William L. Moench, James C. Peterson
  • Patent number: 6555706
    Abstract: This invention is directed to a process for making an iminodiacetic acid compound from a monoethanolamine substrate having the formula: wherein R1 is hydrogen, hydrocarbyl, or substituted hydrocarbyl. The process includes a series of reactions comprising a cyanomethylation, a hydrolysis and a dehydrogenation with the hydrolysis and dehydrogenation steps being carried out either sequentially or concurrently. In a particular embodiment, the iminodiacetic acid produced is disodium iminodiacetic acid and the monoethanolamine substrate used is 2-aminoethanol.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: April 29, 2003
    Assignee: Monsanto Company
    Inventors: Howard C. Berk, Thaddeus S. Franczyk, II, Robert B. Weisenfeld, David A. Morgenstern, Juan P. Arhancet, William L. Moench, James C. Peterson
  • Publication number: 20020019565
    Abstract: This invention is directed to a process for making an iminodiacetic acid compound from a monoethanolamine compound having the following formula: 1
    Type: Application
    Filed: May 15, 2001
    Publication date: February 14, 2002
    Inventors: Howard C. Berk, Thaddeus S. Franczyk, Robert B. Weisenfeld, David A. Morgenstern, Juan P. Arhancet, William L. Moench, James C. Peterson
  • Patent number: 5723049
    Abstract: A process is provided for selectively converting formaldehyde in an acidic organic waste aqueous stream in the most part to formose sugars rather than to alkali metal formate and methanol by reacting the stream with a strong alkali base to provide a pH of at least about 8.5 and heating the resulting basic solution to a temperature of at least about 80.degree. C. The formaldehyde is present in the waste stream in amounts between about 1000 ppm to 10,000 ppm.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: March 3, 1998
    Assignee: Monsanto Company
    Inventor: Robert B. Weisenfeld
  • Patent number: 4954466
    Abstract: A process is provided for recovering cobalt values from a cobalt-N-acetyliminodiacetic acid complex by dissolving the complex in an aqueous solution of a strong acidic solution, extracting the acid solution with a hydrocarbon solvent containing a trialkylamine to transfer the cobalt from the aqueous solution into the hydrocarbon solvent, stripping the cobalt from the hydrocarbon solvent with water, and precipitating the cobalt from the stripping water by using a strong alkali.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: September 4, 1990
    Assignee: Monsanto Company
    Inventor: Robert B. Weisenfeld
  • Patent number: 4948909
    Abstract: An improved process is provided for producing iminodiacetonitrile by contacting ammonia, formaldehyde and hydrogen cyanide, or hexamethylenetetramine, formaldehyde and hydrogen cyanide in a reaction medium, the improvement which comprises the further steps of thereafter adjusting the pH of the reaction medium to a pH between about 5.5 and about pH 10 and heating the reaction medium to an elevated temperature for a sufficient time to convert by-products in the reaction medium to iminodiacetonitrile.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: August 14, 1990
    Assignee: Monsanto Company
    Inventors: Karl E. Koenig, Gary A. Lanser, Paul A. Morrison, Robert B. Weisenfeld