用硫酸从铜钴合金中浸出铜和钴的试验研究

研究了用硫酸从铜钴合金中浸出钴。以氟化氢铵作添加剂,考察了浸出反应的影响因素。试验结果表明:对于100 g合金粉,在固液质量体积比约1∶7,温度90~95℃,硫酸用量44 mL(98%),8 g氟化氢铵,80g氯酸钠,反应时间4 h条件下,钴浸出率在98%以上,铜浸出率在95%以上,而铁绝大部分留在沉淀渣中。     

陶瓷膜净化溶剂油的实验研究

研究了平均孔径0.2 mm的陶瓷膜对含杂质溶剂油的微滤过程,选用不加水和加0.5%(w)水2种料液,考察了操作时间、跨膜压差、错流速度、温度和铝粉含量对膜通量及铝粉截留率的影响,研究了反冲操作、浓缩和污染膜清洗过程. 结果表明,不加水较加水料液的膜通量明显增大;随操作时间延长,膜通量下降至稳定,铝粉截留率迅速增大至100%;跨膜压差增大或温度升高使稳定通量增大;错流速度增大,稳定通量先升高之后不变;铝粉含量越高,膜通量越低. 适宜的操作参数为跨膜压差0.16 MPa、错流流速3.9 m/s和温度40℃. 反冲操作能有效提高膜通量;浓缩过程中膜通量快速下降至平缓阶段再较快降低,净化溶剂油澄清透明;采用0.15%(w)洗洁精和0.25%(w)硝酸清洗可使通量恢复到新膜通量的94.9%.     

水性透明氧化铁黄色浆在木器漆中的应用研究

采用自制水性透明氧化铁黄色浆分别与丙烯酸和聚氨酯清漆制备了木器漆,考查了自制色浆对木器漆的稳定性、粒径、透明度与相容性等性能的影响,表明水性透明氧化铁黄色浆在聚氨酯与丙烯酸木器漆中均有良好的配伍性。     

水性透明氧化铁红分散体的制备及其性能研究

优化了自制分散剂Fa和润湿剂Wa制备水性透明氧化铁红分散体的工艺,探讨了制备的水性透明氧化铁红分散体的性能。结果表明:当透明氧化铁红用量为20%(占整个分散体系的质量分数),分散剂Fa和润湿剂Wa的用量分别为透明氧化铁红用量的4.0%和1.0%;在45 Hz下研磨45 min时,即可获得颗粒小、透明度好、贮存稳定性优异的水性透明氧化铁红分散体。     

聚季铵盐辅助络合-超滤提取钨(Ⅵ)(英文)

Polyquaternium-6 (PQ6) as the water-soluble polymer was used for complexing the anion forms of tungsten (Ⅵ) before ultrafiltration. Tungsten (Ⅵ)-PQ6 complex was retained by polysulfone hollow fiber ultrafiltration membrane in the complexation-ultrafiltration process. Effects of various operating parameters such as polymer metal ratio(PMR), pH and chloride ion concentration on permeate flux (J) and tungsten rejection coefficient (R) were investigated. The integration of four experiments including concentration, decomplexation, diafiltration and reuse of regenerated polymer was carried out. In the process of concentration, J declines slowly and R is about 1 at PMR of 3 and pH of 7. Tungsten concentration in the retentate increases linearly with volume concentration factor. Tungsten is concentrated efficiently with the membrane. The concentrated retentate was used further for the decomplexation. It takes about 6 min to reach the decomplexation equilibrium at chloride ion concentration of 50 mg·L-1 . The decomplexation percentage of tungsten (Ⅵ)-PQ6 complex reaches 56.1%. In the diafiltration process, tungsten (Ⅵ) can be extracted effectively by using 50 mg·L-1 chloride ion solution, and the purification of the regenerated PQ6 is acceptably satisfactory. The regenerated PQ6 was used to bind tungsten (Ⅵ) at various pH values. The binding capacity of the regenerated PQ6 is close to that of fresh PQ6, and the recovery percentage of binding capacity is higher than 90%.