摘要
采用阳离子交换树脂法制备L-组氨酸螯合钙,测定了D151和110两种弱酸型阳离子交换树脂的钙离子交换容量及其在26℃下的交换动力学曲线,并考察了温度、NaOH与L-组氨酸摩尔比、L-组氨酸初始浓度和树脂量对2种树脂钙交换过程的影响.结果表明,D151和110的钙交换容量分别为1.12和2.59mmol/g;交换过程迅速,工业上交换0.5h即可达到平衡;钙离子交换是一个放热过程,工业生产中可在室温下或低温下进行;适宜的NaOH与L-组氨酸摩尔比为(1～1.25):1;用D151树脂时适宜的L-组氨酸初始浓度和树脂量分别约为0.46mol/L和0.125g/mL;用110树脂时分别约为0.4mol/L和0.15g/mL.
The complex of L-histidine calcium was prepared with D 151 and 110 cation exchange resins. The calcium exchange capacities and exchange kinetic curves at 26 ℃ with the resins were measured. And the effects of temperature, molar ratio of NaOH to L-histidine, concentration of L-histidine, and quantity of resin on calcium exchange process were determined. The results show that calcium exchange capacities of D 151 and 110 resins were 1.12 and 2.59 mmol/g, the exchange process was quick, and calcium exchange process exothermic, so industrial process could be carded out at room temperature or low temperature. The proper molar ratio of NaOH to L-histidine was （1-1.25）：1, the proper concentration and resin quantity of D151 cation exchange resin were 0.46 mol/L and 0.125 g/mL or so, and those of 110 resin were 0.4 mol/L and 0.15 g/mL or so.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第6期1103-1108,共6页
The Chinese Journal of Process Engineering
基金
福建省泉州市科技计划重点基金资助项目(编号:2005G6)
