Patents Assigned to Future Fuel Chemical Company
  • Use of an acetic acid wash to prepare low-sulfate 5-sulfoisophthalic acid, mono-lithium salt
    Patent number: 8884045
    Abstract: There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 500 ppm sulfate. The process uses a reaction mixture of water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed with acetic acid to obtain a high quality LiSIPA having less than 500 ppm sulfate. Also disclosed is a high quality, non-purified reaction product containing a mono-lithium salt of 5-sulfoisophthalic acid and having less than 500 ppm sulfate.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: November 11, 2014
    Assignee: Future Fuel Chemical Company
    Inventors: Timothy A. Oster, Michael Todd Coleman
  • USE OF AN ACETIC ACID WASH TO PREPARE LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT
    Publication number: 20130211120
    Abstract: There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 500 ppm sulfate. The process uses a reaction mixture of water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed with acetic acid to obtain a high quality LiSIPA having less than 500 ppm sulfate. Also disclosed is a high quality, non-purified reaction product containing a mono-lithium salt of 5-sulfoisophthalic acid and having less than 500 ppm sulfate.
    Type: Application
    Filed: March 29, 2011
    Publication date: August 15, 2013
    Applicant: FUTURE FUEL CHEMICAL COMPANY
    Inventors: Timothy A. Oster, Michael Todd Coleman
  • Purification of 5-sulfoisophthalic acid by the use of an acetic acid wash on a crude cake
    Patent number: 8404886
    Abstract: A method for the purification of 5-sulfoisophthalic acid wherein via the application of an acetic acid wash while said crude cake of 5-sulfoisophthalic acid is filtered.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: March 26, 2013
    Assignee: Future Fuel Chemical Company
    Inventor: Timothy A. Oster
  • Diaminium bis-3,5-dicarboxybenzensulfonate and tri-diaminium bis-3,5-dicarboxybenzensulfonate and methods for producing same
    Patent number: 8178648
    Abstract: A composition of matter comprising a diamine salt and sulfoisophthalic acid in a ratio other than one salt to one acid and a process for producing a diamine salt of sulfoisophthalic acid comprising generating a sulfoisophthalic acid and charging the sulfoisophthalic acid with diamine.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: May 15, 2012
    Assignee: Future Fuel Chemical Company
    Inventors: Tracy A. Torno, Candice Stalker, Maria Adriana Sousa-Ragle, Todd Coleman, Ronnie Hampton