方法采用萃取-结晶法。
Methods The solvent extraction and crystallization methods were used.
研究了用无溶剂重结晶法提纯2 ，6二氯甲苯。
Purification of 2,6 dichlorotoluene by the recrystallization method without solvent was studied.
提出了一种利用酸分离稀土的简便方法———酸分级结晶法。
An easy method of rare earth separation-acid fractional crystallization was put forward.
本文论述了利用混合溶剂——结晶法提纯除虫脲的分析技术。
The method was established for purification of diflubenzuron by crystal technique with mixed solvents.
此技术通过液浆结晶法分离PX，并从母液中分离出PX结晶体。
PX is separated through liquid crystallization and PX crystal is separated from mother liquor.
研究了三聚氰胺结晶法净化湿法磷酸生产磷酸二氢钾的结晶过程。
Crystallization course of potassium dihydrogen phosphate from wet process phosphoric acid purified by crystallization with melamine phosphate was investigated.
用无溶剂结晶法纯制二苯醚，该方法具有高效、经济和洁净的特点。
Purification of diphenyl ether by crystallization without solvent is discussed. This method has provided with the characteristics of high efficiency, economy and cleanness.
结论：一步结晶法合成头孢氨苄可以大大缩短工艺过程，降低生产成本。
Conclusion: the synthesis of Cefalexin by one step crystallization can greatly shorten the craft and lower the production cost.
研究了用三聚氰胺结晶法由湿法磷酸生产磷酸二氢钾的结晶动力学过程。
The crystallization kinetics of potassium dihydrogen phosphate from wet-process phosphoric acid purified by crystallization of melamine phosphate was investigated.
结晶法-制备高效液相色谱法制备阿托品，方法简便、经济、纯度较高。
Using crystallization method and preparation-HPLC preparation atropine, the method is simple, economic and the refined products is pure.
本文采用低温结晶法，选择最佳工艺条件，得到理想产率的不饱和脂肪酸。
Applying the crystallizing process under low temperature and selecting the optimum technology condition, the paper successively abstracted unsaturated fatty acid with real recovery.
研究了复合法和结晶法两种封接方式，使陶瓷基座与膜片达到良好的匹配封接。
In order to acquire a good hermetic seal between the diaphragm and the base plate, two sealing methods were used, namely, compound method and crystallite method.
采用控制结晶法研制出甲硝唑混悬液并对其质量控制方法及稳定性进行了研究。
Metronidazol suspension was preparated by means of controlled crystallizational methods and its quality and quantity control method and stability were studied.
采用乳化结晶法，研究了粗蒽精制过程中溶剂、温度、助剂及分离时间的作用。
The effects of solvent, temperature, additive and separation time on the refinement process of crude anthracene by using emulsion-crystallization were reported.
经试验证明，用降温结晶法从酸性硫脲溶液分离金和银，乃是一种有效的方法。
It has been confirmed in practice that separating of gold from silver in acidic thiourea solution by means of decreasing the temperature of solution then crystallization is a very effective method.
以富含萘的裂解芳烃馏分为原料，开发静态分步结晶法从芳烃馏分中提纯工业萘。
The purification of technical naphthalene by stepped static crystallization method in cracked aromatic fraction, which is rich of naphthalene has been developed.
微晶淀粉的制备方法按生成微晶的主要步骤可划分为回生法、水解法和结晶法三类。
According to the primary procedure of the formation of microcrystalline starch, the preparation methods were classified as retrogradation, hydrolyzation and crystallization.
本研究测定了金、银硫脲络合物的溶解度曲线，它给结晶法分离金、银提供了理论依据。
In this research the solubility curves of the thiourea complexes are measured and these curves provide the theory basis for separating sold from silver with crystallizing method.
用重结晶法对所合成的中间体进行了提纯 ，并用高效液相色谱对产物纯度进行了分析。
The intermediate were purified by recrystallization. The analysis of purity of the products was studied through HPLC.
多晶硅薄膜的制备方法很多，主要有化学气相沉积法、激光结晶法、金属诱导晶化法等。
Poly-Si can be produced by laser crystallization of a-Si, metal-induced crystallization of a-Si, and many other methods.
本文介绍了真空结晶法的原理，以及真空结晶器的类型和选型，并比较了这两种结晶法。
The principles of the vacuum crystallization, types and selection of crystallizers were given. Comparison of the above two methods we…
方法分别以“碱溶-酸析”法或甲醇、 乙醇等有机溶剂重结晶法，制备吉美拉西的多晶型。
Methods Gimeracil polymorphs were prepared by alkali-acid treatment or recrystallization with EtOH, MeOH, etc.
以对苯二甲酸生产装置中排放的废催化剂为原料，采用萃取—结晶法回收其中的醋酸钴和醋酸锰。
The extraction-crystallization method was used to recover cobalt and manganese acetates from the waste catalyst in the PTA production process .
介绍用自然冷却结晶法、渗析扩散法和焙烧法回收废酸及合废酸、含石油类杂质废水的处理方法。
It introduces the methods of recovering waste acid and water with waste acid and oily impurity using the natural cooling crystallization, the dialyzing diffusing and roasting.
介绍煤焦油中萘含量测定的两种方法：蒸馏结晶法和气相色谱法，对两种方法的优缺点及分析结果进行了对比。
Two methods of distillation crystallization method and gas chromatography to determine the naphthalene content in coal tar oil were introduced.
介绍煤焦油中萘含量测定的两种方法：蒸馏结晶法和气相色谱法，对两种方法的优缺点及分析结果进行了对比。
Two methods of distillation crystallization method and gas chromatography to determine the naphthalene content in coal tar oil were introduced.
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