2019-08-152019-08-152019-07-30Chen, Li, Wong, Michael S. and Zhang, Zongchao, "Anhydrosugar synthesis." Patent US10364265B1. issued 2019-07-30. Retrieved from <a href="https://hdl.handle.net/1911/106250">https://hdl.handle.net/1911/106250</a>.https://hdl.handle.net/1911/106250Improved methods of making anhydrosugars by pyrolysis of a substrate sugar to remove at least one water molecule thereby producing a desired anhydrosugar and side products, the improvement being either 1) protecting one hydroxyl group of the substrate sugar before pyrolysis; or (2) pretreating the substrate sugar with a metal salt and optional acid before pyrolysis, wherein lower amounts of said side products are produced by said improved method.19engUtility patentUS10364265B1