Lactic acid is an important chemical that can be used to synthesize biodegradable polymers, such as polylactic acid (PLA) and its copolymers. Precipitation was employed to recover lactic acid from a calcium lactate solution using sulfuric acid. In this study, we optimized process parameters of precipitation to obtain a high yield and purity of lactic acid from a calcium lactate solution. Also, we observed the influence of the main process parameters on precipitate formation during the course of precipitation using a video microscope. The optimal calcium lactate/sulfuric acid molar ratio and pH were 1/1 and 6.8, respectively. Also, the effect of mixing method on the efficiency of precipitation and the formation of precipitate were evaluated. When the sample was mixed continuously after adding sulfuric acid, lactic acid was obtained in high yield. By mixing the sample, we were able to significantly reduce the precipitation time, the length of which has been a problem inherent in the conventional precipitation process. The yield of recovered lactic acid was 92% with a purity of 71%.
키워드
Lactic acidRecoveryPrecipitationOptimization of process parameters
저자
Da-Jeong MIN [ Department of Chemical Engineering, Kongju National University, Cheonan 330-717, Korea. ]
Kook-Hwa CHOI [ Department of Chemical Engineering, Kongju National University, Cheonan 330-717, Korea. ]
Jin-Hyun KIM [ Department of Chemical Engineering, Kongju National University, Cheonan 330-717, Korea. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
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4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
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