氟化氢

Process and use of Fluoroelastomer. Aerator is required in workshop sinc e

化过程中也会产生含有氟化氢等的微量有毒气体，在加工现场必须安装通风设

This paper relates to the preparation of phosphorus pentafluoride and the solubility of phosphorus pentafluoride in aether.

本论文对以五氧化二磷和无水氟化氢为原料制备五氟化磷的工艺和五氟化磷在乙醚中的溶解度进行了初步研究。

The invention provides an anhydrous hydrogen fluoride production process; reaction raw materials fluorite powder and sulfate are mixed by an external mixer and enter into a converter with jacket; hot air with the temperature of 350 DEG C to 600 DEG C is fed in the jacket; the fluorite powder and the sulfate have chemical reaction and produce hydrogen fluoride; the produced hydrogen fluoride enters into a scrubber from a furnace header to be washed; the washed hydrogen fluoride enters into an intermediate tank from a condenser, and then receives distillation and degasification to prepare the finished product anhydrous hydrogen fluoride; solid residue is emitted from a furnace tail.

本发明提供一种无水氟化氢生产工艺，反应原料萤石粉及硫酸经外混器混合后进入带有夹套的转炉，向夹套内通入350～600℃的热风，萤石粉和硫酸在发生化学反应生成氟化氢，生成的氟化氢气体由炉头进入洗涤塔进行洗涤，洗涤后的氟化氢由冷凝器进入中间槽，然后经过精馏、脱气制得成品无水氟化氢；固体残渣由炉尾排出。

Process comprising contacting initiator with alkylene oxide in the presence of hydrogen fluoride and a double metal cyanide complex catalyst.

一种方法，其包括说明书摘要在氟化氢和双金属氰化物复合催化剂存在下使引发剂与亚烷基氧化物接触。

To achieve such a miracle, the semiconductor industry has gone to extremes , using the world's most toxic substances like arsine, hydrofluoride and the like.

7 但是，为了这种"奇迹"，半导体技术也到了无所不用其极的地步，世上最剧毒的物质如砷化氢、氟化氢等都派上了用场。

Reaction conditions are studied, and the result shows that it is better to adopt mercuric oxide or mercuric fluoride as fluorination catalyst with reaction temperature -20~-10℃.

结果表明，采用氧化汞或氟化汞作氟化催化剂、氟化氢作溶剂较好，适宜的反应温度为－20~-10℃，较长的反应时间(48 h)和增加氟化氢和催化剂的量有利于氟化。2-氯－5-三氯甲基吡啶的转化率和选择率均可达到97%以上。

The dry process aluminum fluoride divides into the hydrogen fluoride preparation according to the technical process (including acid to material, fluorspar to give material, hydrogen fluoride reactor) and the aluminum fluoride preparation including the fluid bed, exhaust processing, end product processing.

干法氟化铝按工艺流程分为氟化氢制备（包括酸给料、萤石给料、氟化氢反应炉）及氟化铝制备包括流化床、尾气处理、成品处理。

When the temperature is above 100℃, no reaction of SiO_2 with gaseous hydrogen fluoride is observed, but the reaction is accelerated when the surface of SiO_2 is coated by a special polymer film.

二氧化硅与气相氟化氢的反应和与氢氟酸的反应不同，当温度高于100℃时，气相氟化氢与裸露的二氧化硅无明显反应，当二氧化硅表面涂上一层特殊聚合物膜时，反应可很快发生。

In the electrolytic exhaust gas of aluminium, the hydrogen fluoride is the main pollutant , so it is to judge one of the important standards up to standard of in electrolytic discharge of aluminum smelter to measure the content that the exhaust gas hits the hydrogen fluoride.

在铝电解烟气中，氟化氢是最主要的污染物，因此检测烟气中氟化氢的含量是判断电解铝厂排放是否达标的重要标准之一。

The method of using fluorine hydride to produce fluorobenzene is the best method,which overcomes the shortcoming of the Schiemann method,it can make the cost lower,reduce waste gas and raise recovery rate.

用无水氟化氢法生产氟苯是国内外最先进的方法，它克服了传统席曼法的缺点，它的显著优点是使成本降低、废气减少、收率提高，本文介绍了生产氟苯的两种主要方法的合成原理，重点介绍了无水氟化氢法生产氟苯的生产工艺过程及对所产生的废酸、污水、废渣的处理。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。