Patents by Inventor Dae Rew

Dae Rew 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).

  • Publication number: 20070049764
    Abstract: A method of synthesizing glycol diester by reacting a linear aliphatic carboxylic acid and a glycol monoester in the presence of a Lewis acid type catalyst is provided. In the method, after introducing the glycol monoester, the linear aliphatic carboxylic acid and the Lewis acid type catalyst into a reactor, the reaction occurs to produce reaction products and water in the reactor; an excess of the linear aliphatic carboxylic acid forms an azeotrope with water during the reaction to be sent to a condenser through a distillation column; the linear aliphatic carboxylic acid and water passed through the condenser are divided into an organic layer and an aqueous layer in an oil water separator; and the organic layer is returned to the distillation column through a material cycling line and water in the aqueous layer is removed through a water removal line.
    Type: Application
    Filed: August 23, 2005
    Publication date: March 1, 2007
    Inventors: Donghyun Ko, Kwang Park, Sang Lee, Jijoong Moon, Sungshik Eom, Dae Rew