我国干燥技术和装备的研究及应用

介绍我国干燥设备的开发、研究和应用情况。情况表明：我国干燥技术有很大的进步，大批进口干燥器的时代已经结束。     

含铅废渣中铅的回收利用

用正交实验法,对湿法回收硫酸锌生产中含铅废渣中的铅生产醋酸铅的工艺条件进行了优化,得出了最佳工艺条件,且平均回收率达到了86．38％。     

用于生产碱溶性聚酯切片的联合设备的开发

针对碱溶性共聚酯(COPET)的特点,设计开发了双风道FBM330型结晶、干燥联合设备,讨论了双风道结晶、干燥系统在COPET切片结晶、干燥过程中的工艺流程及控制参数,指出该设备同样适合于大有光阳离子可染切片的结晶、干燥的生产。     

FP石膏在硫化轮胎模具上的应用

主要阐述FP石膏材料、制芯工艺过程及烘干工艺，阐述了应用硅橡胶母模复制石膏芯表面光洁度高，尺寸精度较好，硫化轮胎的铸造成品率达99％以上。     

Effect of Mode of Drying on Microstructure of Potato

Potato v. Irga was subjected to blanching, and thereafter was dried by convection, puff-drying, and freeze-drying. Microstructure of raw, blanched, and dried tissue was analyzed under the light microscope using computer image analysis. It was found that the tissue of the investigated variety is built up from cells much smaller than those described in literature for other cultivars. Blanching caused starch gelatinization and increase of cross-sectional area of cells. There was no evidence of broken cell walls. Convective drying resulted in cell shrinkage and some breaking of cell walls. It was estimated that some 12% of cells lost integrity during drying. Limited disintegration of the tissue caused by convective drying is attributed to small size of cells, large contact area, and high cohesive forces between cells. Puff-drying damaged the tissue much more than the convective drying. The most devastating to tissue microstructure was freeze-drying, probably freezing per se.     

氯气干燥系统的技术改造

介绍了引起氯气干燥系统设备管道漏裂、堵塞、腐蚀的原因及其危害性,提出了包括设定合理的工艺参数,严格执行操作规程及改造更新设备管路等解决措施。     

Spray drying conditions and encapsulating composition effects on formation and properties of sodium diclofenac microparticles

This paper reports the preparation and characterization of sustained release sodium diclofenac microparticles by spray drying. Aqueous dispersions of ethyl cellulose (Surelease®) and Eudragit RS 30 D® were evaluated as controlled release polymers. The product properties (product moisture, size distribution, particle morphology, flow properties, total drug load, in-vitro dissolution studies, and encapsulating efficiency) were determined as a function of inlet temperature of the spray drying, the feed flow rate and composition of the microencapsulating formulation. In general, lower values of the product moisture content were observed at higher drying temperatures. The spray-dried product was composed mainly by rounded-shape and multi-size particles. The mean particle diameters of the Eudragit based microparticles tended to be slight bigger than the Surelease based microparticles. The spray dried microparticles showed delayed drug dissolution rates, sustaining the drug release for several hours. These findings confirm the feasibility of the spray drying for preparation of microparticles with sustained release properties. The physical and chemical properties of the microparticles can be changed by varying the spray drying parameters as well as the microencapsulating formulation.     

压力容器与气瓶在材料检验方面异同点的分析

分析了压力容器与气瓶在材料检验方面的异同点，并提出了一些建议。     

NMR imaging and differential scanning calorimetry study on drying of pine,birch, and reed pulps and their mixtures

Drying, water fractions, and water distribution were investigated for pine, birch, and reed pulps and pine–birch, pine–reed, and pine–birch–reed pulp mixtures. Gravimetrically determined drying times showed that the drying rates of the pulps decreased at two to four inflection points. Characterizations of the dried pulps by differential scanning calorimetry (DSC) showed a faster removal of free water than freezing and nonfreezing bound waters; all decreased simultaneously, however. DSC also revealed the critical water contents at which the free water and freezing bound water disappeared. The gravimetrically determined inflection points of the drying curves corresponded with the critical points determined by DSC. NMR line widths and images produced by ¹H‐NMR imaging revealed the nature and regions of the pulp drying. The constant growth rate of the NMR line widths with decreasing water content appeared to change at two inflection points, which fell approximately in the same water content regions as the inflection points of the drying curves. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 937–945, 2006