CAJ | 학술논문

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2.59 mmol/g;交换过程迅速,工业上交换0.5 h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0.46 mol/L和0.125 g/mL;用110树脂时分别约为0.4 mol/L和0.15 g/mL.
채용양리자교환수지법제비L-조안산오합개,측정료D151화110량충약산형양리자교환수지적개리자교환용량급기재26℃하적교환동역학곡선,병고찰료온도、NaOH여L-조안산마이비、L-조안산초시농도화수지량대2충수지개교환과정적영향.결과표명,D151화110적개교환용량분별위1.12화2.59 mmol/g;교환과정신속,공업상교환0.5 h즉가체도평형;개리자교환시일개방열과정,공업생산중가재실온하혹저온하진행;괄의적NaOH여L-조안산마이비위(1～1.25):1;용D151수지시괄의적L-조안산초시농도화수지량분별약위0.46 mol/L화0.125 g/mL;용110수지시분별약위0.4 mol/L화0.15 g/mL.
The complex of L-histidine calcium was prepared with D151 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 D151 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 carried 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.