从氯化铅渣中回收铅铋的研究

本文以柿竹园有色金属矿粗铋火法精炼、气化除铅产出的铅渣为原料，在常压下采用氯化钠水溶液进行浸出处理，有效地分离了铅和铋，并将铅制成了化工产品黄丹及硫酸铅     

聚醚二醇钾盐引发D．L－丙交酯的开环聚合研究

以聚乙二醇－４０００钾盐为引发剂．合成了食不同长度聚醚链段的聚Ｄ．Ｌ－乳酸－聚乙二醇－聚Ｄ．Ｌ－乳酸（ＰＬＡ－ＰＥＧ－ＰＬＡ）三嵌段共聚物。考察了溶剂用量、引发剂用量、反应温度和时间、ＰＥＧ分子量、不同溶剂对聚合反应的影响。以１Ｈ－ＮＭＲ、ＩＲ、ＤＳＣ、ＧＰＣ对共聚物进行了表征。     

Development of stabilized itraconazole nanodispersions by using high-gravity technique

Purpose: For large scale preparation of stabilized itraconazole (ITZ) nanodispersions to improve the dissolution rate.

Method: High-gravity technique was employed to produce ITZ nanodispersions.

Results: Stabilizer had a significant effect on the stability of drug nanoparticles. Hydroxypropylmethylcellulose was found to be the most effective stabilizer to prevent drug nanoparticles from aggregation. ITZ nanoparticles with an average size of 210?nm were obtained. Mannitol was the suitable carrier matrix for improving the flowability and the dissolution rate of ITZ nanodispersion. The effects of operating variables on the particle size distribution were investigated in detail. The stability of ITZ nanodispersions was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, differential scanning calorimetry, and in vitro dissolution studies. After 6 months storage, the nanodispersion showed unchanged particles size, morphology, crystal state, chemical structure, and dissolution. In vitro dissolution rate indicated that the nanodispersion could significantly enhance the dissolution rate when compared to the commercial available Sporanox capsules. The nanodispersion achieved 70% of drug dissolution in 10?min, whereas the Sporanox capsules only dissolved 20% during the same period.

Conclusion: This study demonstrated that high-gravity technique is a promising method for large scale production of nanodispersions to enhance the dissolution rate of poorly water-soluble drugs.     

天然红枣果肉饮料生产研究

本文以红枣、银耳和莲子等天然滋补品为原料，经蒸煮打浆、调配、均质、脱气、灌装、灭菌等过程加工成天然红枣果肉饮料，其色泽枣红、枣香味浓、口感细腻淡雅，营养丰富，总氨基酸含量高达３２３．９８ｍｇ／１００ｇ。     

不饱和聚酯片状模塑料耐漏电起痕性能的研究

在不饱和聚酯片状模塑料中分别加入氢氧化铝和二异氰酸酯预聚物对其进行耐漏电起痕改性。利用扫描电镜对材料被电弧击打后的微观结构进行观察。结果发现未改性不饱和聚酯片状模塑料出现不同程度的烧蚀碳化,而改性后的模塑料电腐蚀痕迹明显减弱,其耐漏电起痕性能明显提高。     

PET—PEG嵌段共聚物的热性能和流变性

酯交换法合成了一系列不同ＰＥＧ含量的ＰＥＴ－ＰＥＧ嵌段共聚物，并以差示扫描量热法研究了这些嵌段共聚物及纯ＰＥＴ的热性能。用毛细管流变仪研究了不同温度和不同长径比条件下它们的流为性能。     

粗硫酸镍脱除钙镁的工艺研究

研究了用化学沉淀法脱除粗硫酸镍中的Ｃａ、Ｍｇ。实验表明，络合沉淀剂是一种效果较好的沉淀剂，在６０℃、ＰＨ值在３．０－６．０之间、用量系数为１．５、反应时间１ｈ以上时，其脱除Ｃａ、Ｍｇ的效果良好，能达到电池用酸镍标准。     

尼尔基左岸灌溉管闸门井滑框倒模设计与施工

阐述了滑框倒模模板施工工艺在尼尔基左岸灌溉管闸门井工程中的应用,提出了合理的模板设计方案,并通过对该方案施工全过程的介绍,得出该工艺施工质量好、耗材少、速度快、经济效益高,具有工程实际应用价值。     

制备超细高纯硅酸铝新工艺试验研究

采用萃取法净化工艺和稀释沉淀法净化水玻璃溶液，在添加剂存在下合成超细高纯硅酸铝．产品质量接近德国迪高沙公司相应产品的质量标准．     

EDTA提高含金多金属硫化矿选别指标的研究

本文通过EDTA在含金多金属硫化矿浮选中应用的研究,论证了应用EDTA提高选别指标的优越性,为含金硫化矿矿石浮选找到了一种新的调整剂。