Study on method for determination of lead in food additive-Calcium carbonate 食品添加剂碳酸钙中铅含量测定方法的研究
It is the second time the DEC has issued a charge of pollution with criminal negligence, following charges against the Esperance Port Authority over emissions of lead carbonate during shipping. 这是第二次在12月已发出负责污染刑事疏忽,以下指控埃斯佩兰斯港口管理局超过排放碳酸铅在航运。
The stratabound lead& zinc deposits distributing between platform marginal facies and subtidal facies of restricted carbonate platform were dominated by the lithofacies palaeogeographic framework. 岩相古地理对层控铅锌矿具有明显的控制作用,主要分布于台地边缘浅滩相与局限台地潮下过渡部位。
A mineral consisting of lead carbonate that is an important source of lead. 一种由铅的重要来源铅碳酸盐构成的矿物。
The reasons for the differences were: ① The prepared lead carbonate contained chemical structure water, but the purchased lead carbonate didn't. 存在性能差别的原因为:①自制碳酸铅中含有羟基即化学结构水,而购买碳酸铅中不含羟基。
Mineralization feature of lead and zinc deposits related with carbonate rock in Weixi-Puer ore belt in west Yunnan 滇西维西-普洱成矿带之与碳酸盐岩有关铅锌矿床的矿化特征
Nanometer sized lead oxide was prepared by pyrogenetic decomposition of lead carbonate synthesized by chemical precipitation. 采用均匀沉淀法合成碳酸铅,在此基础上通过高温分解制备纳米氧化铅。
Preparation of High Active Ultrafine Lead Powders Manufacture and Application of Ultrafine Active Calcium Carbonate 高活性超细铅粉的研制超细活性碳酸钙的制备及应用
The influence factors including the amount of ammonium hydrogen carbonate and acetic acid, reaction time, the ratio of liquid-to-solid on converting rate of lead in the processing of ammonium hydrogen carbonate transformation have been studied in detail. 探讨了铋冶炼浸渣采用碳酸氢铵转化过程中,碳酸氢铵与浸渣配比、碳酸氢铵及醋酸加入量、反应时间、液固质量比等因素对铅的转化率的影响。
Lead compounds and zinc compounds are active catalysts for the reaction of urea and 1,2-propylene glycol, especially lead carbonate which shows very excellent catalytic activity. 以铅、锌的化合物为催化剂,进行尿素与1,2-丙二醇合成碳酸丙烯酯的反应,所用的铅、锌化合物催化剂均有活性,其中碳酸铅的催化活性最高。
Studies of the Electrode Preparation of Electrode from Lead Carbonate for Lead acid Battery ⅰ The activation of the PME 碳酸铅制备铅酸蓄电池电极的研究Ⅰ-电极的活化
It is found that the concentration of nitric acid has great effect on reclaiming rate of lead in the processing of nitric acid leaching-lead deposition after investigating the preparation of tribasic lead sulphate from bismuth waste residue by ammonium hydrogen carbonate transformation method. 通过对铋冶炼浸渣采用碳酸氢铵转化法合成三碱式硫酸铅的工艺研究,得出在硝酸浸出&硫酸沉铅工艺过程中影响铅回收率的主要因素为硝酸质量浓度。
Determination of Trace Copper, Lead and Zinc in Brines by FAAS after Co-precipitation with Calcium Carbonate 碳酸钙共沉淀-火焰原子吸收光谱法测定卤水中痕量铜铅锌
Shuicheng lead and zinc zone is an important ore accumulation area in Guizhou province. The orebodies mainly occur in carbonate rocks of Upper Carboniferous Series, which is controlled strictly by fault structures. 水城铅-锌矿带是贵州重要的铅锌矿化集中区,铅锌矿主要产于上石炭统碳酸盐岩中,受断裂构造控制明显。
Study on the production of lead stearate from sediment containing lead, the optimal technical conditions of converting lead sulfate to lead carbonate are obtained. 从含铅废渣中生产通明g酸铅进行研究,得到了硫酸铅转化为碳酸铅的最佳工艺条件,制得了团组gMtf;
The processing principle for the preparation of tribasic lead sulphate from bismuth hydrometallurgy waste residue by ammonium hydrogen carbonate transformation-nitric acid leaching-lead deposition with sulphuric acid-sodium hydroxide synthesis is introduced. 介绍了铋冶炼浸渣采用碳酸氢铵转化硝酸浸出硫酸沉铅氢氧化钠反应合成三碱式硫酸铅的工艺原理。
The occurrence of the Yutang lead and zinc-sulfide deposit in the Cambrian carbonate rocks is controlled mainly by tectonic, lithologic and algae reef factors. 渔塘铅锌矿床产于寒武纪碳酸盐岩中,主要受构造、岩性和藻礁相控制。
This paper outlines the cognitional process with regard to the thermal decomposition of lead carbonate in CO_2 gas. 本文概述了对碳酸铅在二氧化碳气氛中热分解的认识过程。
Performance of lead carbonate as positive active mass of VRLA battery 碳酸铅作为正极活性物质的性能
Study on the technology of basic lead carbonate pearlescent pigment by pushing process and inversing phase method 碱式碳酸铅珠光颜料的挤水转相工艺研究
Study on Lead Carbonate as Electrode Materials of Lead Acid Battery 碳酸铅作为铅酸蓄电池电极材料的研究
It was showed that the reacting activity of the prepared lead carbonate was higher than that of the purchased lead carbonate. 研究发现:自制碳酸铅的反应活性明显高于购买碳酸铅的反应活性。
The kinetics of conversion of galena into lead carbonate in ( NH_4)_2CO_3 solu-tions was studied using electrochemical method with a rotating ring-disc electrode. 应用旋转环盘电极研究了方铅矿在碳酸铵溶液中直接转化为碳酸铅的反应机理。
The production technology of basic lead carbonate A STUDY ON SPRAY DRYING OF BASIC CHROME SULPHATE 碱式碳酸铅的生产工艺研究离心喷雾干燥法制备固体碱式硫酸铬
The differences between the purchased lead carbonate and the prepared lead carbonate were studied by methods of cycle voltammogram, electrochemical impedance spectroscope ( EIS), constant current discharge, thermogravimetric analysis and scan electron microscope ( SEM). 通过循环伏安曲线、交流阻抗、恒流放电、热重分析、扫描电镜等方法对自制碳酸铅与购买碳酸铅的性能进行了研究。
Lead& zinc deposits in this region, deposits, mineralization of many, from the Upper Sinian Dengying to Lower Permian Maokou, were distributed in the carbonate formation, but the size of a huge amount of difference. 本地区铅锌矿床、矿点、矿化点众多,从上震旦统灯影组至下二叠统茅口组,各碳酸盐地层中均有分布,但规模、数量差别巨大。
According to results of present work, a suggested principle flow sheet for the extraction of lead and manganese dioxide from lead concentrate and manganese carbonate ore is given in the fifth chapter of this paper. 根据本研究的结果,本文的第五章给出了从铅精矿和碳酸锰矿提取铅和二氧化锰的推荐原则工艺流程。