Preparation of colloidal Sb2O5 from arsenic-alkali residue

The stable colloidal antimony pentoxide was prepared by oxidation of the mixture of Sb2O3 and Sb2O5 obtained from arsenic-alkali residue by hydrometallurgical process, with hydrogen peroxide as oxidant and phosphoric acid as stabilizer. Effects of main factors were investigated. The theories on thermodynamics, kinetics and electrical double layer（EDL） were used to analyze the experimental phenomena and results. The results show that no＇aging time is the most beneficial to forming colloid, when molar ratio of phosphoric acid to antimony is in the range from 0.8 to 1.0 and 1.0 to 1.3, the particle sizes of sol with the concentration of 10% and 15% antimony pentoxide by mass are both smaller. With increasing concentration of the mixture of antimony oxide from 10% to 20%, the reaction time decreases from 90 to about 30 min, but the optimized range of molar ratio of H3PO4 to antimony increases. The reaction temperature is not the main factor on particle size with the existence of H3PO4 in the temperaturd range from 60 to 90℃.     

金山词霸帮你化繁为简

有些朋友喜欢上港台网页，或者喜欢下载小说来看．当碰到个别难懂的繁体字时，部分人就会手足无措，如果你的电脑上装了“金山词霸“你可以利用其强大的字典功能对这个难题迎刃而解，你只要做的就是把不认识的繁体字复制进金山词霸的输入框．点击查询。     

发展精细化工的几点建议

从技术创新，节能，环保等方面对２１世纪的精细化工发展进行了探讨。指出企业既要注重经济效益，又要注重长远的社会效益，加强环境保护，节约能源，走产，学，研结合的道路，使企业在竞争中立于不败之地。     

新型高阻尼金属材料的研究进展

综述了近年来有关新型高阻尼金属材料的研究思路，制备方法和性能研究等方面取得的进展，指出目前研究中存在的总是和高阻尼金属材料的研究方向，并展望了高阻尼金属／金属复合体材料未来的研究与应用前景。     

刘强东:运河的孩子,中关村的成长

刘强东很年轻,当然,他不是时髦的80后,中国人民大学92级社会学系的学生,应该是1974年左右生人.不管怎么说,在主流的企业家中,仍然算得上年轻,尤其当他坐在自己的办公室里的时候,看起来尤其如此.     

预混法阴离子沥青乳化新技术的应用

利用预混法阴离子乳化沥青技术，用兰３号阴离子乳化剂对原沥青进行乳化处理，所得乳化沥青的各项性能指标均合格；在合适的沥青用量下，乳化沥青混合料的马歇尔稳定度比原沥青混合料提高６０％。用这种乳化沥青铺筑路面，不需加热、施工方便、成本低、工程质量优良，与用原沥青相比，既可节约能源，提高工作效率，又可减少加热沥青对环境造成的污染，故值得大面积推广应用。     

Preparation of adhesive for bamboo plywood using concentrated papermaking black liquor directly

1INTRODUCTION Paperpulpandpapermakingindustryarethe importantlightindustry,however,thepollution concernedisserious,especiallytheharmofblack liquortoenvironmentisthemost.Therefore,the treatmentofblackliquorhasbecomeanimperative taskforpapermakingindustry[16].Atpresent,thecommonlyusedmethodsof treatmentofblackliquorarerecoveringligninby acidseparation[7],agglomerationandsepara tion[8],super filtration[9]andrecoveringalkaliby combustion[10]etc.However,thereallexistsome disadvantages,forexamp…     

Study on stainless steelmaking dust agglomeration

A new direct recycling technology was developed to recover the valuable metals present in the stainless steelmaking dust and protect the environment. The agglomeration behavior of the dust was analyzed to ensure the requirements of the direct recycling. The main characteristics such as strength, leachability, structure and chemical composition of the pellets were investigated. SEM images show a significant amount of porosities affecting the strength of the pellets and the arrangement of particles in the pellets reveals that no recrystallization bonds are formed, resulting in the poor strength of the pellets. When lignosulfonate is applied as the binder for the agglomeration and the green pellets are dried at room temperature for 60 h, the strong pellets can be obtained without milling the dust. The result of leachability tests shows that the pellets agglomerated can not satisfy the regulations set by the environmental protection agency of US. And it will cause some environmental problems in the long storage of pellets.     

输纸故障排除一例

我厂使用的J2205型胶印机,输纸带换用了无接头的新型输纸带。在用128g/m~2进口铜版纸印刷奖券时,出现了下纸不稳现象。 首先,我们在低速情况下,检查下纸时间,发现时间稍慢,把万向联轴器调节一下,配合把底规、压纸轮、输纸带调节正常,并将气泵风量进行了相应调节,然后跑车,发现定速后还有不稳的现象。