摘要
研究了L-精氨酸在无外加影响因素的条件下,结晶温度、结晶时间、搅拌速度及降温速度对L-精氨酸重结晶的影响。研究结果表明,在相同的条件下,L-精氨酸的结晶温度控制在60℃,结晶率可达88%以上;慢速搅拌有助于晶体的生成;采用在高温时快速冷却,待降至一定温度后,再慢速冷却降温,可以保证L-精氨酸结晶体的颗粒度较为均匀;L-精氨酸的结晶时间在5 h附近为宜。通过重结晶过程的控制和优化可以有效改善精氨酸的产品品质,进一步缩小与国际先进水平的产品品质差距。
L-arginine production in China still lack of competitiveness compared to advanced country.In this study,some influencing factors on the recrystallization of L-arginine,such as the crystallization temperature/time,stirring speed and different cooling ways in the solution of L-arginine system are investigated.The rate of crystallization can be up to over 88％ when the stirring speed and crystallization time are constant and the crystallization temperature keep at 60℃.The slow stirring speed will benefit the formation of L-arginine crystals.Moreover,most of L-arginine crystals can be provided with a certain grain size,when the solution at high temperature is rapidly quenched to a certain extent,then cooled slowly.The result shows that the proper crystallization time is about 5 hours.The purification can be improved by process control on the recrystallization of L-arginine,which is helpful to improve the product quality and its competitiveness.
出处
《现代化工》
CAS
CSCD
北大核心
2014年第10期106-108,共3页
Modern Chemical Industry
基金
广东省绿色化学产品技术重点实验室开放基金项目(GC201204)
关键词
L-精氨酸
重结晶
结晶率
L-arginine
recrystallization
crystallization rate
