The synthesis methods of Nipagin Esters Catalyzed by sulfuric acid, p-toluene sulfonic acid, ferric sul-fate hydrate, ferric chloride hexahydrate, aluminium chloride hexahydrate, rare earth compound, solid super acid and heteropoly acid were reviewed. 评述了采用硫酸、甲苯磺酸、合硫酸铁、水合三氯化铁、水合三氯化铝、土化合物、体超强酸和杂多酸等催化剂催化合成对羟基苯甲酸酯的方法。
In the light of the general situation and characteristics of the potash resources in china, production methods are offered of the conversion of sulfuric acid or sulfate and potassium chloride into potassium sulfate and the extraction of potassium sulfate from sea water and bittern. 摘要针对我国钾盐资源的概况及特点,介绍了以硫酸或硫酸盐与氯化钾转化制取硫酸钾及利用海水卤水提取硫酸钾的生产方法。
The paper describes new development of the process that takes commercial sulfuric acid and Potassium chloride as starting material to make potassium sulfate, studies basic principle of three phase extraction that the process used, lists the experimental data and analyzes it with view of economy. 描述了用工业硫酸和氯化钾为原料,萃取法制取硫酸钾新工艺及其工程化的新进展。研究了该工艺三相萃取过程的基本原理,列出了试验数据及经济技术评价。
The main processes of bisphenol-A including sulfuric acid process, hydrogen chloride process and ion-exchange resin process are briefly introduced. 介绍了双酚A的主要生产方法:硫酸法、氯化氢法、离子交换树脂法。
Dealed the sample with sulfuric acid, reduced As(ⅴ) to As(ⅲ) with the thiurea-ascorbic acid, and then the content of arsenic in poly aluminium chloride was determined by hydride generation-atomic fluorescence spectrometry. 探讨了以硫酸预处理样品,硫脲-抗坏血酸混合液将As(Ⅴ)预先还原至As(Ⅲ),氢化物发生原子荧光法测定聚合氯化铝中砷含量的方法。
Recovery of silver, zinc and lead from flue dust of zine metallurgy has been systematically studied in this paper. The optimum process parameters for extraction of zinc by dilute sulfuric acid leaching and extractions of silver and lead by calcium chloride leaching have been investigated. 系统地研究了从锌冶炼烟尘中回收银、锌、铅的新工艺,考察了稀硫酸浸取锌,氯盐浸取银、铅的最佳工艺参数。
Leaching of a copper residue, produced by selected oxidation leaching of a nickel matte, in oxygenated sulfuric acid solution with the participation of chloride was investigated. 研究了镍锍选择性氧化浸出产生的铜渣在硫酸介质中氯离子参与下的氧气氧化浸出。
The assay of sulfuric acid-carbazole was used to determine the contents of the glucuronic acid, the method of sedimentation by barium chloride for the contents of sulfate radical and the assay of sulfuric acid-cysteine for the fucose. 用硫酸-咔唑法测定其葡萄糖醛酸含量,用氯化钡沉淀法测定其硫酸根含量,用硫酸-半胱氨酸法测定其岩藻糖含量。
So far, potassium sulfate has been produced mainly by the reaction of concentrated sulfuric acid and potassium chloride. 目前,硫酸钾生产主要以曼海姆法为主,即用浓硫酸与氯化钾反应。
This set of process technology was designed to produce chemical products such as sulfuric acid, calcium chloride, ammonium hydroxide and dry ice, using phosphorus gypsum. 设计了一套用磷石膏生产硫酸,氯化钙并副产氨水、干冰等化工产品的工艺技术。
Sulfuric acid, ammonium chloride, sodium hydroxide and ethanol were selected as coagulation bath under different coagulation temperature and coagulation time to manufacture HEC membranes. 分别选取硫酸、氯化钕、氢氧化钠和乙醇等溶剂作为凝固浴,在不同凝固温度和凝固时间下凝固制备HEC膜。