1) One-step crystallization
一步结晶
1.
One-step crystallization can produce higher purified sodium penicillium G,and the more yield of approximate 5 per cent.
制备一种青霉素G钠盐用的媒晶剂,该媒晶剂由Mg~(2+)、Fe~(2+)、Fe~(3+)、Al(3+)、Cu(2+)等二、三价金属阳离子及十二烷基苯磺酸钠等表面活性剂组成,用于改变青霉素G钠盐晶体的晶形,即由一步结晶法制得高纯度的青霉素G钠盐产品,结晶收率提高近5％。
2) one stey crysteallization
一步结晶法
3) fractinal precipitation-substitution
分步结晶一置换
1.
by fractinal precipitation-substitution.
本研究用分步结晶一置换法联合生产硫酸铜和硫酸亚铁，工艺简单，原料胜用率较高，成本低，有实用价值。
4) Step crystallization
逐步结晶
5) fractional crystallization
分步结晶
1.
From the beginning of the basic concept of fractional crystallization from the melt , some thermodynamic problems such as crystal structure, solid solution, nucleus forming and growing-up, have been discussed by means of bond parameters in combination with the thermodynamic data.
从金属分步结晶精炼的基本概念出发 ,用键参数结合已有热力学数据讨论了金属分步结晶精炼的晶体结构、固溶体、形核与晶核长大等问题 。
2.
Coupled with the living examples of refining metal by fractional crystallization,the kinetic formula of fractional crystallization in the refining of metals were deduced according to the concepts of diffusion and effective coefficient of separation and criteria for the effective of fractional crystallization.
结合金属结晶精炼的实例 ,从扩散、有效分离系数等基本概念出发 ,推导了金属分步结晶精炼的动力学公式 ,分析了金属分步结晶精炼的判据。
3.
While preserving the advantages of the original Witten process for manufacturing DMT,an improved Witten process has been developed featuring the use of new reactors and advanced separation technology including mixed oxidation,mixed esterification,vacuum crystallization,special rectification and fractional crystallization.
保持原有Ｗｉｔｅｎ法流程技术优势的前提下，采用先进的反应器和分离技术，开发了以混合氧化、混合酯化、减压结晶、特殊精馏和分步结晶为主要特征的Ｉｍｐｒｏｖｅｄ－Ｗｉｔｅｎ法ＤＭＴ生产新工艺。
6) two steps crystallization
两步结晶
补充资料：分步结晶
一种古老的用于分离化学性质相近的金属化合物的方法。此法依靠化合物间溶解度的微小差别，通过重复操作而达到分离的目的。钽、铌复合氟化物（如K2TaF7和K2NbOF5·H2O）的分步结晶，锆、铪复合氟化物（如K2ZrF6和K2HfF6）的分步结晶,铷、钾草酸盐的分步结晶，轻稀土硝酸盐和硝酸铵(或硝酸镁)复盐的分步结晶等，都曾经在工业上应用。此法近年来虽然多被溶剂萃取法和离子交换法所代替，但在某些条件下仍然应用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条