Patents by Inventor Zongchao C. Zhang

Zongchao C. Zhang 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).

  • Method for conversion of carbohydrate polymers to value-added chemical products
    Patent number: 8110667
    Abstract: Methods are described for conversion of carbohydrate polymers in ionic liquids, including cellulose, that yield value-added chemicals including, e.g., glucose and 5-hydroxylmethylfurfural (HMF) at temperatures below 120° C. Catalyst compositions that include various mixed metal halides are described that are selective for specified products with yields, e.g., of up to about 56% in a single step process.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: February 7, 2012
    Assignee: Battelle Memorial Institute
    Inventors: Zongchao C. Zhang, Heather M. Brown, Yu Su
  • Methods for conversion of carbohydrates in ionic liquids to value-added chemicals
    Patent number: 7939681
    Abstract: Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: May 10, 2011
    Assignee: Battelle Memorial Institute
    Inventors: Haibo Zhao, Johnathan E. Holladay, Zongchao C. Zhang
  • METHODS FOR CONVERSION OF CARBOHYDRATES IN IONIC LIQUIDS TO VALUE-ADDED CHEMICALS
    Publication number: 20100317879
    Abstract: Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
    Type: Application
    Filed: August 24, 2010
    Publication date: December 16, 2010
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Haibo Zhao, Johnathan E. Holladay, Zongchao C. Zhang
  • METHOD FOR CONVERSION OF CARBOHYDRATE POLYMERS TO VALUE-ADDED CHEMICAL PRODUCTS
    Publication number: 20090270608
    Abstract: Methods are described for conversion of carbohydrate polymers in ionic liquids, including cellulose, that yield value-added chemicals including, e.g., glucose and 5-hydroxylmethylfurfural (HMF) at temperatures below 120° C. Catalyst compositions that include various mixed metal halides are described that are selective for specified products with yields, e.g., of up to about 56% in a single step process.
    Type: Application
    Filed: April 28, 2008
    Publication date: October 29, 2009
    Inventors: Zongchao C. Zhang, Heather M. Brown, Yu Su
  • METHODS FOR CONVERSION OF CARBOHYDRATES IN IONIC LIQUIDS TO VALUE-ADDED CHEMICALS
    Publication number: 20080033187
    Abstract: Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
    Type: Application
    Filed: July 6, 2007
    Publication date: February 7, 2008
    Inventors: Haibo Zhao, Johnathan E. Holladay, Zongchao C. Zhang