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| Number | Title | Issue Date |
| 6054611 | Method for the production of levulinic acid and its derivatives A method of producing dehydration products from one more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40-240° C. for 1 to 96 hours in the presence of 5-90% sulfuric acid, separating the reaction products, and recovering levuli... | 04/25/2000 |
| 5892107 | Method for the production of levulinic acid A method of producing dehydration products from one or more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40°-240 ° C. for 1 to 96 hours in the presence of 10-90% sulfuric acid, separating the reaction products, and recovering... | 04/06/1999 |
| 5782982 | Method of removing silica or silicates from solids resulting from the strong acid hydrolysis of cellulosic and hemicellulosic materials A method of removing silica or silicates from solids results from the acid hydrolysis of materials containing cellulose and hemicellulose is disclosed. The method includes the steps of treating the solids with a metal hydroxide solution to produce an extr... | 07/21/1998 |
| 5726046 | Method of producing sugars using strong acid hydrolysis A economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydrolyzed to produce a hy... | 03/10/1998 |
| 5620877 | Method of fermenting sugars resulting from strong acid hydrolysis An economically viable method of fermenting a mixture of sugars resulting from the acid hydrolysis of material containing cellulose and hemicellulose allows for the simultaneous fermentation of both pentose and hexose sugars. The sugar solution is mixed w... | 04/15/1997 |
| 5597714 | Strong acid hydrolysis of cellulosic and hemicellulosic materials A economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydrolyzed to produce a hy... | 01/28/1997 |
