提高原子吸收分光光度计石墨炉法测定Pb的灵敏度的研究

以20 ng/mL铅标准溶液为试样,采用HITICHI Z-2000原子吸收分光光度计石墨炉法,进行了灰化温度、原子化温度、净化温度、时间常数、灯电流、狭缝宽度和基体改进剂实验。优化确定了提高测定Pb灵敏度的实验条件,使20 ng/mL的铅标样吸光度达到厂方推荐参考值0.12以上。     

渤海蓬莱19-3油田原油电脱水器与离心机的比选分析

针对蓬莱19-3油田FPSO较大的海水处理量,结台电解铜铝技术和次氯酸钠技术的特点,对这两项技术在该油田FPSO的应用进行比选分析.     

Inflation Cosmological Solutions in Two-Dimensional Brans-Dicke Gravity Model

Introduction Inflation cosmology is an important theory fordescribing the evolution of the early universe. Thistheory attracts wide attention[1-3]because it can suc-cessfully explain the flatness, horizon and magnticmonopole problems, and may be supported experi-mently in observation of microwave background radia-tion. There are two basic types of inflation models:one is the higher-derivative gravity model; another isbased on the model of scalar field. These models areusually studied within th…     

吸附法从轻质石油品中脱除微量硫的研究

以十二硫醇-已烷溶液为研究体系，评选出以金属盐溶液改性和研制得到的对硫化物有良好吸附性能的930A系93GH系特殊吸附剂；用静态法和微分床法研究这两种系列的吸附剂吸附硫化物的相平衡关系，吸附热效应及吸附动力学过程；用这两种系列的吸附剂对实际轻质石油品进行脱硫精制。研究结果表明：评选和研制的这两种系列的吸附剂脱硫效果均较为良好。     

3种欧Ⅵ尾气处理新技术

对于重卡而言,要想满足欧Ⅵ排放法规,SCR催化还原装置和颗粒物过滤器都是必不可少的尾气处理装置。近日,一家专业从事尾气后处理的公司——Tenneco公司,研发出新一代SCR催化还原装置和颗粒物过滤器,具备更轻的质量以及更优的尾气处理能力。     

A study on synthesis and oxidation mechanism of mono-alkyl phosphate

Oxidation of white phosphor, us by peroxides to produce mono-alkyl phosphate in the alcoholic solution has been studied under non-and catalytic conditions. In this paper, the mechanism of the oxidation process was analyzed. The content of mono-alkyl phosphalte in the product is affected by different types of alcoholic solution and peroxide solvent. The result shows the availabulity of the following order for the activity of the peroxide solvent and alcoholic solutions-tert-butyl hydroperoxide>(di) benzoyl peroxide>hydroperoxide; methanol> n-butyl alcohol> phenol. Under optimized reaction conditions: n (a white phosphorus) : n( tert-butyl hydroperoxide) : n (methanol)= 1:10:12, reaction temperature 80 ℃, reaction time 2.5 h, products of 80.0% mono-alkyl phosphonates can be provided when white phosphorus undergoes oxidation by tert-butyl hydroperoxide in the methanol solutions. When Cu (I), and Cn(Ⅱ) complexes are used as catalysts, it is possible to significantly enhance the oxidation of white phosphorus with the increase in the reaction rate. Th'e order for activity of catalysts is Cu(acac)2>Cu (CH3COO)2>Cu (C3 H7COO)2:>CuI>CuCI2. Noticeably, with Cu(acac)2 as catalyst, the selectivity for mono-alkyl phusphonates can reach 95% under adequate reaction conditions.     

实用新型给水消毒器的应用

阐述实用新型复联电极定时式次氯酸钠发生器的结构特点、主要技术经济指标、使用方法和消毒液投加方法的选择。     

美丰加蓝签约德邦物流,品牌影响力持续提升

日前,美丰加蓝正式签约成为德邦物流全国唯一车用尿素溶液供应商。按照协议,美丰加蓝将为德邦物流在全国的集散地提供全系列的车用尿素产品。德邦物流是国家5A级物流企业,主营国内公路运输业务,拥有国内最大的物流车队和最完善的物流运输网络,已开设直营网点4 300多家,服务网络遍及全国,全国转运中心总面积超过92万m^2。