一种新型树脂从钨酸盐溶液中分离钼的研究

采用静态法和动态法,对一种新型树脂从钨酸盐溶液中分离钼的性能进行了研究。结果表明:静态吸附时,树脂对钨钼的吸附在2.5 h可达到平衡,分离系数为14左右。上行法上柱吸附钼的穿透交换容量为8.56 g/L湿树脂,[Mo]/[WO3]从0.0386(料液)降到1.2×10-4(合格流出液)。经过纯净水洗涤后,用稀NaOH溶液作解吸剂,钼的解吸率可达95%,解吸液中Mo的浓度最高可达24 g/L以上,[Mo]/[WO3]从0.038 6(料液)提高到25.03(解析液),富集倍数可达648倍。树脂在重复使用3次的情况下,树脂吸附性能不变。     

离子交换树脂吸附镍钼矿氯浸液中钼的研究

研究了多种离子交换树脂在弱酸条件下吸附镍钼矿氯分解液中钼的吸附性能,结果显示D314树脂在弱酸条件下吸附钼的性能最好,D314树脂在理想吸附条件下的工作吸附容量可以达到160 mg.ml-1湿树脂以上。负载树脂用10%氨水解吸,可得到含Mo大于120 g.L-1以上的解吸高峰液,解吸率达到99.5%以上。另外,杂质磷和砷在离子交换过程中的行为和钼基本一致,因此离子交换过程中不能达到钼与磷砷分离。     

用D314离子交换树脂从沉钼后液中回收钼

研究了以D314离子交换树脂从某沉钼后液中吸附回收钼。试验结果表明:D314树脂对钼的吸附效果较好,溶液pH控制在4.0左右,钼吸附率为93.40%;负载树脂用0.8g/L氨水溶液进行解吸,钼解吸率达94%。     

从低品位钼铅矿中提取钼的试验研究

研究了从氧化钼矿石中回收钼,考察了NaOH质量浓度、温度、时间、液固体积质量比对钼浸出率的影响。试验结果表明:在NaOH质量浓度80g/L、温度95℃、液固体积质量比3∶1条件下浸出矿石120min,钼浸出率达80%以上;浸出液先以Na2S溶液沉铅,再以HCl溶液调节pH=8除硅,然后再用HCl溶液调节pH=2.5,用D314大孔弱碱性阴离子交换树脂吸附钼,用10%NaOH溶液在40℃下解吸钼,钼吸附率及解吸率分别达到95%和97%。     

石煤提钒后液中钼的回收

用离子树脂交换法回收石煤提钒后液中的钼,首先通过树脂选择实验选出最佳树脂D314,然后用动态方法研究不同条件对D314树脂吸附性能的影响。结果表明在pH=3、吸附接触时间90 min、钼浓度10.24 g/L时,D314树脂对钼的吸附性能最好,工作吸附容量可达162.8 mg/mL,负钼树脂在解吸剂氨水浓度为12%、解吸时间90 min时,解吸效果较好。     

某树脂在红土镍矿除杂后液中吸附和解吸镍钴的性能

本文研究了红土镍矿湿法冶金除杂后液应用某树脂吸附和解吸镍钴的性能,试验结果表明,该树脂对镍钴具有较高的离子选择性:当溶液初始pH在3以上,树脂与溶液的比例在4∶100(g∶mL)以上时,吸附的镍钴较多,杂质较少;在优选条件下1 g树脂对镍钴的吸附容量之和达到70 mg;吸附后树脂采用10%硫酸解吸;树脂与解吸液比例为20∶50(g∶mL),解吸三次后即可达到较好的解吸效果,镍钴解吸率分别达到82%和90%。     

辉钼矿焙烧烟气淋洗液中铼的富集

利用离子交换法对淋洗液中铼的富集进行了研究,结果表明,采用凝胶型强碱性阴离子树脂201×7可以较好地吸附淋洗液中的铼,吸附后先用5%NH4OH+5 g/L NH4Cl解吸掉大部分的钼,再用2 mol/L的NH4SCN解吸铼,可以得到含铼1 g/L以上的富铼溶液。     

离子交换法从石煤直接酸浸液中提取钒的工艺研究

研究了用离子交换法从石煤直接酸浸液中提取钒,考察了树脂类型、吸附接触时间、pH等因素对钒吸附率的影响。试验结果表明：采用离子交换法处理石煤酸浸液,能很好地去除溶液中的大部分杂质,使钒得到富集。在溶液pH-2．1、吸附接触时间60min条件下,树脂对V2O5的最大吸附工作容量为270mg／mL湿树脂,钒吸附率在99％以上。以100g／LNaOH溶液为解吸剂进行解吸,解吸液中Vzos质量浓度达100g／L以上。解吸液经沉淀、洗涤、干燥、煅烧,最后得到v20。质量分数在99％以上的钒产品。     

离子交换法从含钼酸浸液中提取钼

含钼酸浸液为高温合金废料经氧化酸浸所得,其Mo浓度为0.67 g·L~(-1),采用离子交换法从含钼酸浸液中选择性提取钼;采用碳酸钠溶液调整含钼酸浸液p H后,先用D296树脂从含钼酸浸液中吸附钼,再用氨水和氯化铵混合溶液解吸钼,所得钼酸铵溶液经蒸发浓缩后冷却结晶制得钼酸铵白色晶体,使酸浸液中钼得到有效回收。实验结果表明:通过静态吸附法选择D296强碱性阴离子交换树脂作为Mo的吸附树脂;当树脂床体积为10 ml,反应温度为25℃、料液p H为2、吸附流速为45 ml·h~(-1)时,Mo吸附率达到98.45%;通过Mo吸附曲线测定D296树脂吸附Mo的饱和容量为50 mg·g-1;当氨水浓度为5%,氯化铵浓度为30 g·L~(-1),树脂床体积为10 ml,氨水和氯化铵混合溶液用量为80ml,解吸流速为10 ml·h~(-1),解吸后液中Mo浓度为3.282 g·L~(-1),Mo解吸率达到99.52%;当钼酸铵溶液含钼浓度达到60 g·L~(-1)以上,再冷却至常温结晶12 h以上,所得钼酸铵白色晶体纯度达到97.95%。     

t-BAMBP萃淋树脂的合成及其对铯的吸附性能研究

研究了以大孔聚苯乙烯树脂为载体合成t-BAMBP萃淋树脂,考察了t-BAMBP萃淋树脂对铯的吸附性能。根据致孔剂正庚烷、交联剂二乙烯苯用量对大孔聚苯乙烯树脂载体孔径、孔容积和比表面积的影响,确定载体最佳合成条件为:正庚烷50g,二乙烯苯30g,苯乙烯20g,在80℃、搅拌速度120~150r/min条件下悬浮聚合10h。以二氯乙烷为稀释剂、t-BAMBP为萃取剂,对该载体进行浸渍合成负载量为50%的萃淋树脂。通过静态和动态吸附试验,考察了溶液pH、吸附时间、原液Cs+质量浓度、循环使用次数等因素对该萃淋树脂吸附铯的影响。试验结果表明:在溶液pH为13、溶液中Cs+质量浓度为80~500mg/L条件下吸附4h,t-BAMBP萃淋树脂对铯的饱和容量为13.7mg/g(干);负载树脂解吸性能良好,以0.5mol/L HCl溶液为淋洗剂,铯解吸率达86%;该萃淋树脂重复使用10次,吸附性能依然良好。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.