水处理剂羟基乙叉二膦酸（HEDP）的制备
毕业设计说明书（论文）外文摘要
Title Preparation of water treatment agent hydroxy-1 ,1-diphosphonic acid (HEDP)
Abstract
We first compared several methods of HEDP preparation and finally determined the synthetic route which used phosphite and acetyl chloride as raw materials according to factors such as the purchase of raw materials and experimental conditions. This experiment was not very complicated, but it was necessary to properly handle some key factors such as the reaction conditions, reaction time and molar ratio of reactants. This experiment was using different molar ratio of reactants synthesizes HEDP to explore the best ratio of reactants. At the same time the stage of the most appropriate response time was summarized by controlling the various stages of the reaction time. Also the purification method of HEDP in this experiment was the sodium salt purification method. The HEDP was first made sodium salt and then the main component and material of the prepared sodium salt are determined by via infrared visible spectrum analysis. The result revealed that the purification method of the sodium salt was efficient, so the sodium salt method is a great purification method of HEDP.
Keywords HEDP Ratio of reactants Purification of sodium France IR analysis
目 录
第1章 绪论 1
1.1 水处理剂羟基乙叉二膦酸（HEDP）的概述 1
1.2 几种水处理剂羟基乙叉二膦酸（HEDP）的常见制备方法 2
1.2.1 概述 2
1.2.2 以乙酰氯和亚磷酸为原料合成 3
1.2.3 以PCl3和CH3CO2H 为原料合成 3
1.2.4 以H3PO3、CH2CO2H 和乙酸酐为原料合成 4
1.2.5 以P4O6和乙酸为原料合成 4
1.2.6 以乙酰氯和亚磷酸三乙酯为原料合成 4
1.3 HEDP的提纯方法 5
1.3.1 同类结晶法和助结晶法 5
1.3.2 Na盐法 5
1.3.3 减压浓缩法 5
1.4 本论文的研究思路、主要内容及今后的研究方向 5
1.4.1 研究思路及主要内容 5
1.4.2 此课题今后可研究的方向: 6
第2章 水处理剂羟基乙叉二膦酸（HEDP）的制备 6
2.1 引言 6
2.2 实验部分 6
2.2.1 本文所用的原料及仪器 6
2.2.2 水处理剂羟基乙叉二膦酸（HEDP）的制备 7