Purification of Malic Acid with Basic Ion Exchange Resin

• Main Author: 高一辰
• Other Authors: 盧贊生
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/37404362650203289219

碩士 === 長庚大學 === 化學工程研究所 === 87 === DL-malic acid is white crystal compound. The major uses of DL-malic acid are food additive and pH value controlling agent in textile industry. The general industrial process for production DL-malic acid is followed by reaction of maleic acid or maleic anhydride with water. The specification of food grade DL-malic acid from U.S. FDA shows that the concentration of maleic acid should be less than 0.05 wt%, and the concentration of fumaric acid should be less than 1.0 wt% in the DL-malic acid product. No any company in Taiwan produce DL-malic acid yet.This work is investigate the adsorption characteristics of DL-malic acid, maleic acid and fumaric acid on the strong basic ion exchange resin Dainion SA-20A. Adsorption isotherms and diffusivities are to be obtained in the batch mixing system. Experimental and mathematical model of ion exchange column will also be developed and verified. The ion exchange column is high selective adsorption of maleic acid. DL-malic acid and fumaric acid are not high selective adsorption in ion exchange column.