液溴

分别用液溴和NBS进行Br-的取代反应，比较了两种方法的收率和操作，提高了收率，优化了方法。

Substitution reaction of Br - carried with liquid bromine and NBS , which to compare the two methods in yield and operation , improve yeild and optimize the method . 3 .

我们用无水苯为反应溶剂，以温和的（PPh3）PBr2作为卤代试剂（冰浴下液溴逐滴滴入PPh3苯溶剂中当场生成）卤化2-丁炔-1,4-二醇，选择性合成得到2-丁炔-1,4-二溴衍生物。

We used the anhydrous benzene as solvent , and made use of ( PPh3 ) PBr2 as halo-substituted reagent ( the bromine was added drop wise into the system ), and selectively obtained the product 2-butyne-1,4-dibromo .

本文采用二步法合成双酚A二氰酸酯（BCE），由氰化钠和液溴反应合成溴化氰。

The Dicyanate of bisphenol A ( BCE ) was synthesized by using the method of two steps .

液溴法从焙烧载金炭中提金工艺的生产应用

Application of liquor Bromine Extracting Gold Process to Production

用溴化铜代替液溴合成对甲氧基-α-溴代苯乙酮

Synthesis of p-Methoxy - α - Bromoacetophenone by Substituting Cupric Bromide for Liquid Bromine

液溴的贮存与输送

Storage and Conveyance of Liquid Bromine

优化溴化反应温度、液溴滴加速率、反应介质用量等溴化反应条件；

In the bromization reaction of LA , the reaction conditions such as reaction temperature , drop time of Br_2 and reaction medium were optimized .

以三氯氧磷、季戊四醇、苯胺和液溴为原料，合成了一种具有成炭结构的磷氮溴协效阻燃剂季戊四醇双磷酸三溴苯胺盐。

A P-N-Br synergistic flame retardant pentaerythritol bisphosphorate tribromoaniline salt was synthesized using phosphorus oxychloride , pentaerythritol , aniline , and bromine as raw materials .

此法避免了直接使用液溴，溶剂用量少，回收容易，是一种安全、经济、无污染的新工艺。

As the process avoid using liquid Br_2 , less solvent is expended and the solvent is easy to recycle , it is a safe , low-cost and green process .

根据溴低熔点，低汽化点，常态下易发生化学反应，且在酸性条件下具有很强的腐蚀性等特点，阐述液溴的贮存与输送方法。

To elaborate the method of storage and conveyance of liquid bromine according to the charateristic of bromine of low melt point , low vaporization point , easy to react in normal environment , high corrosiveness at acid condition and so on .