CAJ | 학술논문

谷氨酸工业结晶过程中会产生大量难以分离回收的细晶，影响收率和产品质量。文中提出了结晶-粒径切割沉降-细晶回用的工艺设想，将不同粒径的晶体分步分离，细晶浓缩后作为晶种回用至结晶过程。使用扫描电镜和粉末X-衍射（PXRD）研究细晶的晶习及其作为晶种回用的可行性，进行不同条件下的分批等电结晶，参考结晶速率、聚结度、CSD等参数确定细晶回用量、适用过饱和度范围等回用条件。结果表明：液体细晶表观为非典型四方六面体，但在谷氨酸结晶中晶面具有自我修复能力；过饱和度和细晶回用量均影响结晶过程，液体细晶的最适过饱和度范围为1-3；在过饱和度S＝2时液体细晶的最适回用量（质量分数）为1％，在S＝3时最适回用量为3％。最终证明通过控制合适的晶体生长环境，细晶回用的谷氨酸结晶工艺是可行的。
곡안산공업결정과정중회산생대량난이분리회수적세정，영향수솔화산품질량。문중제출료결정-립경절할침강-세정회용적공예설상，장불동립경적정체분보분리，세정농축후작위정충회용지결정과정。사용소묘전경화분말X-연사（PXRD）연구세정적정습급기작위정충회용적가행성，진행불동조건하적분비등전결정，삼고결정속솔、취결도、CSD등삼수학정세정회용량、괄용과포화도범위등회용조건。결과표명：액체세정표관위비전형사방륙면체，단재곡안산결정중정면구유자아수복능력；과포화도화세정회용량균영향결정과정，액체세정적최괄과포화도범위위1-3；재과포화도S＝2시액체세정적최괄회용량（질량분수）위1％，재S＝3시최괄회용량위3％。최종증명통과공제합괄적정체생장배경，세정회용적곡안산결정공예시가행적。
As a large number of fine crystals are produced in the industrial crystallization of glutamic acid,which are difficult to be reused and even reduce the yield and quality of products, a crystallization-classification settlement-fine crystal reuse craft to separate crystals was proposed according to different sizes and concentrate fine crystals which can be added to crystallization process as seed.The morphological characteristics of liquid fine crystal seed were studied by electron micrograph and powder X-ray diffraction (PXRD),and the reuse strategy of fine crystal such as back dosage and optimal super-saturation range was determined by a series of batch crystallizations.The results show that liquid fine crystal seed has self-healing ability during the process of glutamic crystallization.The optimal super-saturation range is 1-3.The optimal back dosage is 1%when super-saturation is 2,and the optimal back dosage is 3% when super-saturation is 3.It proves that fine crystal seed can be reused effectively in a suitable condition.