The drying process of chrome liquor was studied. The structure and property of chrome complex reducing by alcohol were analysed and tokened by many present well-rounded separation and analysis methods such as IR, UV-Vis Spectrum, IEC and pH potentiometry. Application tests of chrome tanning agents were conducted and tanning methods of tanning at high pH were studied. A systematic study was conducted on high alkalinity chrome tanning agents application in leather making process and possibility of clean chrome tanning was discussed.

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The drying process of chrome liquor was studied. The structure andproperty of chrome complex reducing by alcohol were analysed and tokened by manypresent well-rounded separation and analysis methods such as IR, UV-Vis Spectrum,IEC and pH potentiometry. Application tests of chrome tanning agents wereconducted and tanning methods of tanning at high pH were studied. A systematic studywas conducted on high alkalinity chrome tanning agents application in leather makingprocess and possibility of clean chrome tanning was discussed.

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Basing on these conclusions, Polyimide/silica composite material films with different silica contents have been prepared by sol-gel approach, and the characters were tokened; Ethanol/water mixture were separated using PI film based on pervaporation, the changing relations of permeation flux, separation factor and concentration, temperature were studied.

在上述試驗基礎上www.中文字幕在线播放，采用溶膠-凝膠法制備不同SiO_2含量的PI/SiO_2復合薄膜，對其性能進行了表征欧美中文字幕综合第一页；利用制備的PI薄膜滲透汽化分離乙醇/水溶液亚洲中文经典三级片在线视频，研究了滲透通量和分離因子隨料液濃度和溫度的變化關系。

The stability of nano-alumina aqueous dispersion is tokened by spectrophotometer and particle size distribution instrument. It is proved that when condition is dispersant PMAA =0.4%, pH =9, nano-γ-alumina content = 4%,ultrasonic for twenty minites, excellent stable nano-alumina aqueous dispersion can be acquired.

用分光光度計和粒度分析儀表征了納米粒子水分散液的穩(wěn)定性日本欧美韩国欧洲亚洲女性，結果表明納米γ相Al2O3濃度為4%好紧好湿好硬国产毛片，分散劑為陰離子聚電解質，用量0.4%韩国A级黄色电影，PH=9欧美va亚洲va伊人，采用超聲波分散20分鐘得到最好的分散效果，納米顆粒的平均粒徑為205nmwww.dxj久久av。

From solution polymerization, polymers are tokened using MALDI-TOF-MSand IR spectrum. The structure of polymers are confirmed and obtain 2-28 repeatunits of poly(p-aminobenzaldehyde). The tip of polymer molecule still have one-NH_2 and one -CHO. To a certainty condtion, this polymer can polymerization tocreat even more molecular weight.

對溶液聚合得到的聚合物進行了飛行時間質譜和紅外光譜表征美女裸身裸乳免费视频3p视色，確定了聚合物分子的結構，測得了聚對氨基苯甲醛的2-28個重復單元一级二级毛片免费看不卡，且聚合物分子末端還保留有一個-NH_2和一個-CHO精品三级在线观看，在一定條件下可以進一步縮合生成更高分子量的聚合物。