Low cost 3, 4-difluoro nitrobenzene was prepared from 2, 4-dinitrochlorobenzene by two-step fluorination.

Development of electrochemical partial fluorination were introduced. The factor: effecting the selectivity of fluorination were reviewed.

简介了电化学选择氟化方法的发展以及最新进展,并着重介绍了影响选择性的因素.

The classification, synthesis and application of ionic liquids in fluorination were introduced in brief.

本文简要介绍了离子液体的分类 、 合成及其在氟化工艺中的应用.

Polyethylene glycols can be used as effective phase transfer catalyst in halogen exchange fluorination.

聚乙二醇可作为卤素交换氟化反应有效的相转移催化剂.

In this paper the main progress in synthesis methods of PFTHF as electrochemical fluorination are emphasized.

本文着重阐述了PFTHF的合成方法如电化学氟化法等的研究进展.

There are two methods for synthesis of the fluoroporphyrins: direct and indirect fluorination.

含氟卟啉合成方法分为直接氟化法和间接氟化法.

Surface fluorination, the new technics of POF cladding, was probed in this paper.

探索了PMMA聚合物光纤 包层的新工艺-表面氟化技术的可行性.

Although all plants normally contain fluorine, the concentration varies greatly.

虽然在正常情况下,所有的植物都含氟, 其浓度变化很大.

The source and control of fluorine in edible betel nut.

食用槟榔;氟;来源;控制;卫生标准.

Contain fluorine toothpaste after all whether well or not?

到底含氟牙膏好不好?

The structure of floating multicavity mold for fluorine rubber was stated.

叙述了浮动式氟橡胶油封多腔模的结构.

It is a compound of aluminum, silica, and fluorine.

它是铝 、 硅和氟的化合物.

The fluorine does not accumulate indefinitely in the water.

氟不会在水里无限制地积累.

Fluorine carbon coating of our country is fast growing.

我国氟碳涂料的发展十分迅速.

Tooth paste with fluorine can effectively guard against tooth decay.

含氟牙膏能有效防止蛀牙.

The system, made by Linde, splits hydrogen fluoride into fluorine.

这个系统, 由林德集团制造, 能将氟化氢分解成氟气.

A large proportion of the fluorine is vaporized during the concentration process.

在浓缩过程中大部份氟蒸出.

Fluorosurfactants basically consist of chains of carbon atoms surrounded by fluorine.

含氟界面活性剂的基本结构是碳原子形成的长链,周围环绕许多氟原子.

What effect does sanded star of left oxygen fluorine have?

左氧氟沙星有什么作用?

Fluorite is common mineral assumed druses.

萤石是一种常见呈晶簇产出的矿物.

In this paper, the geological featureandits mineralization of fluorite deposit related to granite are emphasized.

重点讨论了与花岗岩有关的我国萤石矿床的地质特征及其成矿作用.