离子交换

Keywords ketene;isopropenyl acetate;esterification;strong acidic cation-exchange resin;fine chemical intermediates

乙烯酮；乙酸异丙烯酯；酯化反应；强酸性离子交换树脂；精细化工中间体

The results indicated that three protease can not hydrolyze β-lactoglobulin uniquely but all the component of whey protein.

本研究还比较了酶解法和离子交换树脂法去除乳清蛋白中β-乳球蛋白的效果。

This study concentrates on its extraction from Laminaria japonica aresch by ion exchange.

本实验以海带为原料，用离子交换法提取海藻酸钠，其产品粘度为2。

Using mixed ion exchange resin patent technology, not only can purify water hardness (calcium, magnesium, iron, also can remove plasma) generally unable to get rid of hard softening equipment, such as impurity and peculiar smell chlorine, lead, nitrate, sulfate, organic or pesticides.

采用了混合离子交换树脂专利技术，不仅能够去除水中的硬度，还能够去除一般硬水软化设备无法去除的杂质和异味，如氯、铅、硝酸盐、硫酸盐、有机物或杀虫剂等等。

Objective: To establish a method for the determination of maleic acid in fumaric acid by ion exchange chromatography.

目的：建立离子交换色谱法检测食品添加剂富马酸中杂质马来酸。

It was one of the churn used most widely eqoupment on power plant online,boiler feedwater ' dispose working bore import sense on ensuring security and economical operation of power plant ,though it is one of important supporting technology wrought on power plant in-serviceNow that of boiler water treatment process design most extensively used,it was ion-exchange methodand osmose process,conventional water curing course much serve as RELAID and manhandle and manhandle,much system malfunction and largelabour intensity .

电厂锅炉是生产中使用最广泛的设备之一，锅炉补给水的处理工作对确保电厂安全、经济运行有着重要意义，它是电厂运行中的一项重要技术基础工作。目前锅炉水处理工艺流程设计中最广泛使用的是离子交换法和渗透法，传统的水处理过程中多为继电器和人工操作，系统故障多，劳动强度大，运行成本高。

It was one of the churn used most widely eqoupment on power plantonline,boiler feedwater ' dispose working boreimport sense on ensuring security and economicaloperation of power plant ,though it is oneof important supporting technology wrought onpower plant in-serviceNow that of boiler watertreatment process design most extensively used,itwas ion-exchange methodand osmoseprocess,conventional water curingcourse much serve as RELAID andmanhandle and manhandle,much system malfunctionand largelabour intensity .

电厂锅炉是生产中使用最广泛的设备之一，锅炉补给水的处理工作对确保电厂安全、经济运行有着重要意义，它是电厂运行中的一项重要技术基础工作。目前锅炉水处理工艺流程设计中最广泛使用的是离子交换法和渗透法，传统的水处理过程中多为继电器和人工操作，系统故障多，劳动强度大，运行成本高。

Meanwhile, the determination results are precise and reliable, the maximum deviation is little.

更重要的是离子交换平衡可以迅速和准确地监测和调节。

In the second step,ion metathesis goes along well and a conversion as high as 85.1％ can be obtained without solvent.

在第一步季铵化反应过程中，不加热不添加任何有机溶剂，可获得高达96.5%的转化率；在第二步离子交换反应中，不加溶剂反应照样进行，转化率可达85.1％。

And a glycochain IbGpl-OL-LbGp5-OL has been found out by the way of Pronase E or β elimination reaction to dissociate the glycochain from the molecules of glycoconjugate and through the separation and purification of it by gel column chromatography, and ion exchange ohromatography and then its repetitive unit construction has been tested by the ways and means of full hybridization and partial acid hydrolisis, methylate analysis, Gc, Gc/Ms, iH and 1/3 CNMR.

通过链霉蛋白酶E或β-消去反应等方法，将糖链从糖缀合物分子上解离下来，经凝胶柱层析或离子交换柱层析进行分离、纯化得到相应的糖链LbGp1-OL～LbGp5-OL。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐