甲基丙烯酰胺对氨基水杨酸功能单体的合成

以甲基丙烯酸酐和对氨基水杨酸为原料,制得甲基丙烯酰胺对氨基水杨酸。所得产物结构采用IR和¹H NMR进行表征。考察了反应温度、反应时间和原料配比对收率的影响。结果表明,最佳反应条件为：n(甲基丙烯酸酐)∶n(对氨基水杨酸)=0.559∶1,温度32 ℃,反应时间30 h,在此条件下,产物收率在88.89%左右。     

Deep Purification of Zinc Ammoniacal Leaching Solution

Deep purification of zinc ammoniacal leaching solution by cementation using zinc dust was studied. The effects of relative amount of metallic impurities, dosage of zinc dust, purification time, temperature, pH value and total ammonia concentration in the solution on the purification of the solution were investigated. The results indicate that total ammonia concentration in the solution had no effect on the purification, but relative amount of metallic impurities, dosage of zinc dust, purification time, temperature and pH value of the solution were the main factors influencing the purification. Keeping appropriate molar ratio of copper to cadmium or nickel to cadmium was beneficial to the cementation of cadmium. Nevertheless, the presence of cobalt went against the cementation of cadmium and cobalt. All metallic impurities could be decreased to acceptable levels under the optimized conditions of 2 g/L of zinc dust dosage, 1 h of purification time, 35℃, pH value 9.03 of zinc ammoniacal leaching solution. The deeply purified zinc ammoniacal solution obtained by one-stage purification meets the requirements of zinc electrowinning.     

从冰雪灾害造成南方电网大停电看无锡电网安全

50年一遇的冰雪灾害,给我国电网以巨大打击,南方部分地区出现大范围的线路断线、倒塔现象,给电网安全运行敲响了警钟。从南方电网受灾原因的分析中提出相应对策,并结合无锡电网的实际,提出应对严重自然灾害,确保电网安全运行的对策与防范措施。     

Preparation, characterization and photo-catalytic behavior of WO3-TiO2 catalysts with oxygen vacancies

TiO₂ photocatalysts compounded with WO₃ were prepared via a modified hydrolysis process and the 2% WO₃-TiO₂ catalysts with different oxygen vacancies were obtained by calcination at 873 K in H₂ atmosphere. The catalysts were identified using X-ray diffractometry (XRD), specific surface measurement (BET), electron paramagnetic resonance spectroscopy (EPR), UV-Vis diffusion refraction spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of 2% WO₃-TiO₂ with different oxygen vacancies was investigated employing splitting of water for O₂ evolution. The results indicate that appropriate oxygen vacancies can obviously improve the photocatalytic activity of 2% WO₃-TiO₂ catalysts, and using Fe³⁺ as an electron acceptor under UV irradiation in 12 h, the maximum rate for O₂ evolution is 667 µmol/(L·h).     

新型絮凝剂合成及其赤泥沉降性能研究

采用水溶液聚合法成功合成了不同分子量的系列丙烯酰胺-丙烯酸钠-β-衣康酸单甲酯共聚物絮凝剂(标记为:ASAM).比较了自制ASAM与国产商品PAMT和进口商品絮凝剂Alclar665对河南一水硬铝石型铝土矿(铝硅比约为7)拜耳法溶出矿浆的赤泥沉降分离效果.结果显示:ASAM添加量为100mg/L、干赤泥含量119.7g/L时,前5分钟平均沉降速度为1.24m/h,是Alclar665的1.57倍,是PAMT的4倍;底流液固压缩比仅为2.93,并且沉降后上清液的浊度低.所有结果都表明自制絮凝剂絮凝性能优异.     

焦炭粉冷固成型用粘结剂的研制

探讨了聚丙烯酰胺、葡萄糖、高岭土、AlCl3、腐植酸钠、水溶性苯酚－甲醛树脂和自制的水溶性树脂A（简称为树脂A）等对水玻璃改性的影响。结果表明,树脂A使焦炭粉冷固成型的球团的生球和干球强度明显提高。并确定了其较佳配方：水与水玻璃的重量比为4：6,其总用量为16％（占干焦炭粉的重量百分比）;树脂A用量为0．24％（占干焦炭粉的重量百分比）。在此较佳条件下,所制球团的生球和干球强度,与用未改性水玻璃(其中水与水玻璃的重量比为3：7,其总用量为16％（占干焦炭粉的重量百分比）所制球团的生球和干球强度,几乎相等,但前球团的耐水性以及耐热性有明显提高。     

水基改性环氧树脂涂料的合成研究

研究了以环氧树脂Ｅ－ ４４（ 简称为环氧树脂） 为主要原料, 对水基改性环氧树脂涂料———环氧磷酸酯 丙烯酸接枝共聚物的合成反应, 探讨了丙烯酸及其酯, 苯乙烯和引发剂的用量,接枝反应温度, 接枝反应时间等因素对该接枝共聚物水分散稳定性的影响, 确定了较佳的工艺条件。并对该接枝共聚物进行了有关的产品性能和应用性能检测。     

机械活化和氧化-还原处理对攀西钛铁矿精矿盐酸浸出的影响(英文)

研究机械活化和氧化-还原处理对攀西钛铁矿精矿盐酸浸出过程的影响。结果表明:机械活化和氧化-还原处理均可明显提高钛铁矿精矿中铁、钙和镁的浸出;氧化-还原处理的钛铁矿经盐酸浸出后得到的人造金红石,其钙镁含量过高,不能满足沸腾氯化法的要求;经机械活化处理的氧化-还原钛铁矿,能进一步降低盐酸浸出渣的钙镁含量,所得到的人造金红石含TiO290.50%、全铁1.37%、钙镁总量1.00%,完全满足沸腾氯化法的生产要求。最佳的氧化还原处理条件为:在900℃氧气气氛中氧化15min,在750℃氢气气氛中还原30min。     

ICP-AES测定铝土矿中低含量氧化钙—酸溶和碱熔预处理方法比较

废渣矿物组成较为复杂,并有较多玻璃质、微晶质和不同矿物的过渡相存在。废渣中锌主要分布在硅酸盐和锌铁尖晶石中;铅含量低,主要以铅矾形式存在;铁的主要物相为赤褐铁矿和硅酸铁;废渣含碳量高,烧失量较大。根据废渣含锌量及浸出毒性结果,将废渣分为两类处理。锌含量低且浸出毒性在国标规定范围的这一类废渣,金属回收价值不高,可作为建筑材料的原料(如水泥、混凝土及烧结砖)。另一类锌含量较高或浸出毒性超出国标规定范围的废渣,进行还原焙烧回收有价金属,90%以上的Zn和85%以上的Pb挥发进入烟尘,得到锌铅含量低且浸出毒性在国标规定范围的残渣,可用于建筑材料。     

发生炉煤气水分夹带原因探讨

通过对生产过程的分析、测算,分析了冷煤气中夹带水分的主要原因,制定了相应的降低煤气中水分含量的整改措施,达到了预期目标。