The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2015
Filed:
Dec. 02, 2011
Dong Won Hwang, Anyang-si, KR;
Jong-san Chang, Daejeon, KR;
Young Kyu Hwang, Daejeon, KR;
U-hwang Lee, Daejeon, KR;
Hyojin Gwak, Incheon, KR;
Dong Won Hwang, Anyang-si, KR;
Jong-San Chang, Daejeon, KR;
Young Kyu Hwang, Daejeon, KR;
U-Hwang Lee, Daejeon, KR;
HyoJin Gwak, Incheon, KR;
Korea Research Institute of Chemical Technology, Taejeon-si, KR;
Abstract
A method for recovery of highly pure alkyl lactate and lactic acid is provided, which includes a step 1 for producing source liquid comprising lactic acid or ammonium lactate; a step 2 for dehydrating the source liquid product of step 1; a step 3 for producing liquid mixture by sequentially adding and stirring alcohol and acid solution to the dehydrated source liquid; a step 4 for separating and removing ammonium salt precipitation from the liquid mixture of step 3; a step 5 for producing alkyl lactate from ammonium salt-free liquid mixture by esterification reaction; and a step 6 for separating alcohol and alkyl lactate by distillation from the mixture of step 5.