The method how to remove carbon fluoride impurities, for example ethane hexafluoride (C_(2)F_(6)), from raw carbon tetrafluoride (CF_(4)) in a medium-pressure and low-temperature (-60 ℃,2.
讨论了通过低温加压精馏(-60℃、2 0MPa)除去四氟化碳中六氟乙烷等氟碳杂质,以达到4N级四氟化碳对氟碳杂质浓度的要求。
Friction and wear properties of nano-TiO_2 filled polyurethane coatings with polyfluo-150 wax are investigated,and a comparison of tribological performance is made between nano-TiO_2 filled the polyurethane with polyfluo-wax coatings and micro-TiO_2 filled polyurethane coatings polyfluo-wax on MHK-500 friction and wear tester in sliding against stainless steel ring under dry friction condition.
制备出纳米和微米T iO2改性聚四氟蜡/聚氨酯复合涂层,采用傅立叶红外光谱仪分析其结构,在MHK-500型摩擦磨损试验机上考察复合涂层的摩擦磨损性能,采用扫描电子显微镜和光学显微镜观察分析复合涂层的磨损表面和偶件转移膜的分布情况。
Accident Analysis of Explosion of Tetrafluoroethylene Metering Tanks;
四氟乙烯计量罐爆炸事故分析
Structure and property of tetrafluoroethylene-perfluoropropyl vinyl ether copolymer;
四氟乙烯-全氟丙基乙烯基醚共聚物结构和性能
Synthesis of Hexafluoropropene by Co-pyrolysis Reaction of Tetrafluoroethylene with Octafluorocyclobutane;
四氟乙烯和八氟环丁烷共裂解制六氟丙烯反应工艺的研究
Study on the preparation of TFE by pyrolyzing waste PTFE;
废聚四氟乙烯回收生产四氟乙烯单体的研究
The pyrolysis behavior and characteristics of filled polytetrafluoroethylene(PTFE) are studied in the atmosphere of nitrogen with TG-DSC-FTIR and TG.
采用TG-DSC-FTIR、TG技术研究了填充聚四氟乙烯(PTFE)在氮气气氛下的热解行为与热解规律。
A patent for fluorosilicic acid production by adsorption of silicon tetrafluoride with pressure water is described in the production of wet-process phosphoric acid or phosphate fertilizer.
介绍一种在湿法磷酸或磷肥生产过程中用水吸收四氟化硅制备氟硅酸的专利技术。
A method was developed to determine residue of tetraconazole in strawberry and soil, the degradation and final residue of tetraconazole were studied also.
研究了杀菌剂四氟醚唑的残留分析方法及其在草莓和土壤中的消解动态和最终残留量。
The starting reagent, tetrachloro-p-phthalodinitrile, was subjected to fluorination, hydrolysis, decarboxylation, acyl chlorination, and a five-step reduction reaction to synthesize 2,3,5,6-tetrafluorobenzyl alcohol, followed by condensation with 2,2-dimethyl-3-(2,2-dichloro vinyl cyclopropane carbonyl chloride) to yield transfluthrin.
以四氯对苯二甲氰为原料,经过氟化、水解、脱羧、酰氯化、还原5步反应合成四氟苄醇,再与二氯菊酰氯缩合得四氟苯菊酯。
It introduces the method of preparation,research of performance and calculation of uncertainty of mixed gas reference material of tetrafluoromethane,nitrous oxide and hexafluoride in helium.
论述了氦中四氟甲烷、氧化亚氮和六氟化硫混合气体标准物质的制备方法、性能考察、不确定度计算,经与国内外同类标准物质比较,证明量值准确可靠、方法可行。
Properties and usages of tetrafluoromethane are introduced.
介绍了四氟甲烷的性质、用途,叙述了烷烃直接氟化法、氟氯甲烷氟化法、氢氟甲烷氟化法和氟碳直接合成法等制备四氟甲烷的方法,并以具体实例说明。