[EN] METHOD FOR PREPARING CITRIC ACID<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDE CITRIQUE
申请人:COFCO LTD
公开号:WO2011047634A1
公开(公告)日:2011-04-28
Provided is a method for preparing citric acid comprising the following steps: (1) contacting and reacting the fermentation liquid of citric acid with calcium carbonate and/or calcium hydroxide under the condition that the citric acid in the fermentation liquid can be converted into calcium hydrogen citrate, and subjecting the obtained slurry to a solid-liquid separation to obtain solid calcium hydrogen citrate and a first liquid phase; (2) subjecting the solid calcium hydrogen citrate obtained in step (1) to acidolysis to obtain citric acid; (3) contacting and reacting the first liquid phase obtained in step (1) with calcium carbonate and/or calcium hydroxide under the condition that the calcium hydrogen citrate dissolved in the first liquid phase can be converted into calcium citrate, subjecting the obtained slurry to a solid-liquid separation to obtain solid calcium citrate, and recycling the solid calcium citrate to step (1).
提供一种制备
柠檬酸的方法,包括以下步骤:(1) 将
柠檬酸发酵液与
碳酸钙和/或
氢氧化钙接触并反应,在
柠檬酸发酵液中的
柠檬酸可以转化为
氢氧化亚铁酸
钙的条件下,将得到的浆料进行固液分离,得到固体
氢氧化亚铁酸
钙和第一液相;(2) 将步骤(1)中得到的固体
氢氧化亚铁酸
钙进行酸解,得到
柠檬酸;(3) 将步骤(1)中得到的第一液相与
碳酸钙和/或
氢氧化钙接触并反应,在第一液相中溶解的
氢氧化亚铁酸
钙可以转化为
柠檬酸钙的条件下,将得到的浆料进行固液分离,得到固体
柠檬酸钙,并将固体
柠檬酸钙回收至步骤(1)。