共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
本文对生活污水处理厂污泥的酸洗缓蚀有效成分进行了提取,利用失重法对盐酸介质中污泥提取液对碳钢的缓蚀效果进行了研究。结果表明:污泥在质量浓度为5%的盐酸中,温度为80℃,液固比为6∶1,提取时间为2 h的条件下提取得到的提取液对碳钢具有较好的缓蚀效果。在提取液用量为10%时对碳钢的缓蚀率为87.9%,经复配后缓蚀率可达91.1%,可在工业应用方面有较好的前景。脱水污泥提取液的缓蚀性能优于未脱水污泥提取液的缓蚀性能。超声波处理会对污泥提取液的缓蚀性能产生影响。在对污泥进行酸洗缓蚀剂的开发利用时,可先提取胞外聚合物后再进行,可实现污泥的高价值综合利用。 相似文献
4.
水解油菜籽饼粕制取酸洗缓蚀剂 总被引:14,自引:0,他引:14
应用油菜饼粕经水解制取工业酸洗用缓蚀剂,并就该缓蚀剂在盐酸、硫酸中的缓蚀效率进行了测定。结果表明,该缓蚀剂对碳钢的缓蚀率达90%,为油菜饼粕的利用开辟了新的领域。 相似文献
5.
6.
7.
8.
9.
10.
麻疯树是一种可以一次种植多年收获的灌木树种,其果实小桐子含油率高达65%左右,超过油菜、大豆等常见的油料作物。在四川攀枝花市、凉山彝族自治州等地干热河谷的气候条件十分适宜麻疯树的生长,该地区现有40多万亩麻疯树,是目前国内最大的麻疯树资源区。据了解,四川省已选育出麻疯树的优良品种高油1号,并计划建设种植50万亩麻疯树的生物柴油原料基地。 相似文献
11.
12.
13.
Dinesh Singh J. K. Gehlawat Musti S. Rao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1990,47(2):127-136
Oslefins and diolefins are important intermediates in the petrochemical industry and the future promises a further substantial increase in demand. While several catalysts have been formulated in the past for the abstraction of hydrogen from butenes and propylene, these catalysts are inefficient in the abstraction of first hydrogen from butane. Bismuth molybdates (β and γ-phases) containing iron oxide and supported on alumina are used as catalysts in the present investigation on the oxidative dehydrogenation of n-butane. Effects of catalyst content, temperature and oxygen: n-butane ratio on conversion and selectivity to butadiene and (C4H8 + C4H6) are studied in the following ranges of experimental conditions: β-bismuth molybdate/100 mol support I(K), 3–9; γ-bismuth molybdate/100 mol support I(K), 5-20; temperature, 400–500°C; O2: butane ratio, 0.6:1.7. 相似文献
14.
考登钢作为一种高耐候结构钢,广泛应用于各个领域。在火力发电方面,考登钢主要应用在工作环境比较恶劣的烟气加热器和空气预热器中。考登钢表面涂搪的目的就是进一步提高其耐腐蚀性能,延长使用寿命。为了提高考登钢元件的使用寿命,对考登钢表面涂搪瓷的可行性、密着性能、瓷釉、工艺控制、质量保证等方面进行了研究。 相似文献
15.
A viscometer used to measure the viscosity of 10 μl of a liquid, must be miniaturized down, and the liquid velocity gradient in the channel used to determine the viscosity coefficient. Two major factors that affect the liquid velocity are the mechanical forces exerted by the mechanical motors and electromagnetic forces. In this study, electrowetting on dielectric (EWOD) is adopted to drive liquids. Variously sized electrodes on a chip, and two shapes of channel are employed to measure the velocity gradient to determine the viscosity coefficient. The device is fabricated by microelectromechanical system (MEMS) technology. The dielectric layer used in EWOD has a high dielectric constant, BST (Ba0.7Sr0.3TiO3), to reduce the required applied voltage; its surface is coated with hydrophobic polymer, polytetrafluoro-ethylene (PTFE, Teflon® AF DuPont). Experimental results demonstrate that liquids can be pulled at 660 μm/s in linear channels by applying a voltage of 15 V. 相似文献
16.
研究了温度和pH值对漆酶酶活以及漆酶处理纤维压制纤维板性能的影响。结果表明,pH较低、温度较高时漆酶酶活较高,压制的纤维板强度性能较好。但温度太高(60~80℃),延长加热时间,漆酶稳定性变差,酶活明显降低,压制纤维板的强度下降。 相似文献
17.
In reexamining medium effects on photochemical reactions, we have emphasized those on unequilibrated excited species such as the Franck-Condon species. Despite recent advances in femtochemistry, such a discussion in molecular photochemistry is uncommon, and the problem remains challenging on account of the extremely short-lived excited species. However, in such cases, a small perturbation resulting from, for example, weak guest-host interactions could turn into a determining factor in dictating the course of a photochemical channel of deactivation. Examples of medium-directed diabatic processes have been examined with this idea in mind. A modified view on rhodopsin photoisomerization is presented along with the consideration that confinement does not necessarily lead to inhibition of reactions of the trapped substrate. 相似文献
18.
19.
20.
采用实验方法考察工艺参数对沉降斑的影响。基于一个带凸台的平板模具,采用L27(313)正交矩阵进行实验,研究了几何尺寸、熔体温度、注射时间、保压压力及保压时间对厚度突变处沉降斑形成的影响,同时还考虑了熔体温度和注射时间以及保压压力和注射时间之间的交互作用影响;通过性噪比分析和F检验优化成型工艺条件并对工艺参数的影响进行显著性分析。结果表明,对于厚度突变的平板制品,厚度突变的程度对其沉降斑形成的影响最大,其次为熔体温度,保压压力,保压时间等;采取减小厚度变化,降低熔体温度或增加保压压力和保压时间等措施,可以减小厚度突变处沉降斑,从而减少其对外观质量的影响;因素之间的交互作用对制品沉降斑的形成有一定的影响,熔体温度B和注射时间C之间的交互作用影响较为明显,而保压压力D和注射时间C之间的交互作用对该质量指标的影响最小,可以并入误差。 相似文献