Crystallization of s-carboxymethyl-cysteine for its optical resolutic

s-羧甲基半胱氨酸的结晶及其光学分辨率

基本信息

  • 批准号:
    02453114
  • 负责人:
  • 金额:
    $ 3.71万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
  • 财政年份:
    1990
  • 资助国家:
    日本
  • 起止时间:
    1990 至 1991
  • 项目状态:
    已结题

项目摘要

Crystallization phenomena of l-SCMC(s-carboxymethyl-cysteine)in supersaturated solution of dl-SCMC in the presence of sodium chloride was studied from the point of view of industrial purpose. Especially, sticking phonomena of fines on l-SCMC seed crystal and secondary nucleation by it were focused and discussed by suspended seed crystal in a batch crystallizer. In these tests, the marked seed crystal was also suspended and populations of fines found on a crystal surface were also observed, following results were obtained.1)Population of fines suspended in supersaturated solution were almost constant for initial period of batch operation. On a surface of seed crystal, fines were hardly found, but population of fines stuck on seed increased with increase of growth period of seed crystal. On these conditions, population were different by degree of supersaturation and fines were of l-SCMC. From the observation of seed surface rharked, behavior of stuck fines were modeled, and linear correlation between population rate of suspended fines and sticking rate of fines, observed were explained theoretically. When surface area of seed crystal covered by fines became about fifty percents, plots between amount of stuck fines and growing period, became deviated from theoretical line.2)Amount of d-SCMC stuck on crystal surface were observed. For initial period that fines of d-SCMC appeared on l-SCMC seed, amount of stuck d-SCMC fines increased with fourth power of operating period. After 1.5 h after d-SCMC was observed on seed surface, d-SCMC was observed in the suspended fines. From this results, heterogeneous nucleation model of d-SCMC was proposed.Fines are generally considered to be suspended in a supersaturated solution in an industrial crystallizer and affect on growth rate and quality of product crystal. When optimum design for produce of desired crystal in a crystallizer is studied, sticking phenomena of fines on growing crystal is considered important.
从工业应用的角度研究了s-羧甲基半胱氨酸(l-SCMC)在氯化钠存在下的过饱和溶液中的结晶现象。特别是在间歇结晶器中采用悬浮晶种的方法,重点讨论了微细颗粒对l-SCMC晶种的粘附现象及其二次成核作用。在这些测试中,标记的晶种也被悬浮,并且还观察到在晶体表面上发现的细粒群体,获得以下结果。1)悬浮在过饱和溶液中的细粒群体在间歇操作的初始阶段几乎恒定。在籽晶表面上,几乎没有发现细小颗粒,但是粘附在籽晶上的细小颗粒的数量随着籽晶生长周期的增加而增加。在这些条件下,人口是不同的过饱和度和罚款的l-SCMC。通过对种子表面粘附的观察,建立了粘附微粒的模型,并从理论上解释了悬浮微粒的聚集率与粘附率之间的线性关系。当晶种被细小颗粒覆盖的表面积达到50%左右时,粘附的细小颗粒量与生长周期的关系曲线偏离理论曲线。2)观察到d-SCMC粘附在晶种表面的量。在l-SCMC晶种上出现d-SCMC微粒的初期,d-SCMC微粒的粘附量随运行时间的四次方增加。在种子表面观察到d-SCMC后1.5 h,在悬浮细颗粒中观察到d-SCMC。在此基础上,提出了d-SCMC的异相成核模型,认为微细颗粒悬浮在工业结晶器的过饱和溶液中,影响晶体的生长速度和质量。在研究结晶器生产所需晶体的优化设计时,细小颗粒对生长晶体的粘附现象是一个重要问题。

项目成果

期刊论文数量(19)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
横田 政晶,豊倉 賢: "LーSCMC種晶表面上の付着微結晶の挙動、" 化学工学論文集.
Masaaki Yokota、Ken Toyokura:“附着在 L-SCMC 晶种表面的微晶的行为”,《化学工程杂志》。
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    0
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豊倉 賢ら: "sーカルボキシメチルシステインの晶析速度と結晶純度" 化学工学論文集.
Ken Toyokura 等人:“S-羧甲基半胱氨酸的结晶速率和晶体纯度”化学工程杂志。
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M. Yokota and K. Toyokura: "Nucleation rate of fines in supersaturated solution of dl-SCMC and its effect on seed of L-SCMC" Kagaku kougaku Ronbunshu.
M. Yokota 和 K. Toyokura:“dl-SCMC 过饱和溶液中细粉的成核率及其对 L-SCMC 种子的影响” Kagaku kougaku Ronbunshu。
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    0
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豊倉 賢,横田 政晶: ",Effect of suspended fines on growth of crystals" Proc.2nd Work Shop on Opportunities and Challenges in Crystallization Research.
Ken Toyokura、Masaaki Yokota:“悬浮细粉对晶体生长的影响”Proc.2nd 结晶研究机遇与挑战研讨会。
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  • 影响因子:
    0
  • 作者:
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M. Yokota, K. Toyokura: "Behavior of D-SCMC fines on the surface of L-SCMC seed" Kagaku Kougaku Ronbunshu.
M. Yokota,K. Toyokura:“D-SCMC 细粉在 L-SCMC 种子表面的行为” Kagaku Kougaku Ronbunshu。
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TOYOKURA Ken其他文献

TOYOKURA Ken的其他文献

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{{ truncateString('TOYOKURA Ken', 18)}}的其他基金

Prccipitation phenomena of calcite and research for apparatus and operational conditions
方解石的沉淀现象及装置和操作条件的研究
  • 批准号:
    07455316
  • 财政年份:
    1995
  • 资助金额:
    $ 3.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Separation and purification of optically active substancc by crystallization
光学活性物质的结晶分离纯化
  • 批准号:
    07555552
  • 财政年份:
    1995
  • 资助金额:
    $ 3.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Crystallization Rate and Purity of Produced Crystals
结晶率和所产生晶体的纯度
  • 批准号:
    05650770
  • 财政年份:
    1994
  • 资助金额:
    $ 3.71万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Study on generation of new crystal substances and design of crystallizer, crystallizing operation under high utilization of resource, less consumption of energy and out of pollution
新晶体物质生成研究及结晶器设计、资源利用率高、能耗低、无污染的结晶操作
  • 批准号:
    06303008
  • 财政年份:
    1994
  • 资助金额:
    $ 3.71万
  • 项目类别:
    Grant-in-Aid for Co-operative Research (A)
Precipitation of fine single crystal of sparingly soluble salt
微溶盐的细单晶沉淀
  • 批准号:
    63550716
  • 财政年份:
    1988
  • 资助金额:
    $ 3.71万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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Controls of Solution-mediated Polymorphic Transition and Crystal Growth Rate Utilizing Cyclodextrin Complexation
利用环糊精络合控制溶液介导的多晶型转变和晶体生长速率
  • 批准号:
    23590063
  • 财政年份:
    2011
  • 资助金额:
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  • 项目类别:
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