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A kind of CrF 3 based catalyst for HHFC 134a preparation by reacting HFC 133a with AHF via vapor phase fluorination is reported. 报道了一种由HCFC 133a与AHF经气相催化氟化制备HFC 134a的CrF3 基催化剂。
At point e, the substance is wholly in the vapor phase. 到e点时，物质全部变为气相。
Compatible with infrared and vapor phase reflow solder process. 适用于回流焊接工艺。
The vapor phase concentration of durene could be adjusted by the self-made adjustor. 自制的高熔点物料气相浓度调控仪能很好地调控气相中均四甲苯的浓度，具有推广应用价值。
Liquid and vapor phases cannot coexist in equilibrium. 液相和气相不能在平衡中共存。
The first step for removing vapor is to orient the package to access the vapor phase of the product. 提取蒸气的第一步是调整钢瓶的方位，使可以接触产品的气相。
High quality GaN film was grown by hydride vapor phase epitaxy(HVPE) using porous AAO as mask. 采用均匀的多孔阳极氧化铝做掩膜在氢化物气相外延设备中生长出高质量的氮化镓膜。
Single crystal MTN has been synthesized by vapor phase transport route(VPT) using n-propylamine as a new template. 采用蒸气相合成法,以正丙胺作为笼形类沸石材料MTN合成的新模板剂,合成出MTN单晶。
There are mainly two methods to prepare nano sized titania, uch as vapor phase process and liquid phase process. 纳米钛白的制备方法大致可分为两类,即气相法和液相法,而液相法是研究的重点和热点。
Objective: To determine content of guajacolum in bamboo juice with vapor phase chromatography(VPC) as the quality control target of bamboo juice. 目的:通过用气相色谱测定鲜竹沥中愈创木酚的含量,作为鲜竹沥的质量考核指标。
Vapor phase synthesis of 2,3,5-trimethyl phenol from methanol and 3,5-dimethyl-phenol over solid acid catalyst was studied in a fixed bed reactor. 制备并考察了甲醇甲基化法合成2,3,5-三甲基苯酚的固体酸催化剂,进行了甲基化反应工艺条件的优化研究。
Modification of CoMo/TiO_2 Al_2O_3 Catalyst by Gas Phase Fluorination? CoMo/TiO_2-Al_2O_3催化剂的气相氟化改性
Comprehensive survey of vapor phase inhibitors both at home and abroad is given. The application of VPI and the research trend are discussed. 介绍了国内外的气相缓蚀剂技术发展概况,阐述了气相缓蚀剂技术的应用形式,展望了该技术领域内的研究方向。
At last, the analysis methods of soil mercury forms and emission flux of vapor phase of mercury from soil are discussed. 最后，还介绍了土壤汞形态的分析方法以及土壤挥发性汞释放通量的测量方法。
Structural properties of epitaxially laterally overgrown (ELO) GaN on patterned GaN "substrates" by hydride vapor phase epitaxy (HVPE) have been investigated. 研究了在刻有图形的GaN“衬底”上用HVPE方法侧向外延生长 (ELO)GaN的结构特性。
This paper deals with the application of a Ni/C catalyst to the reaction for synthetising propionic acid and ethyl propionic by vapor phase carbonylation of ethanol. 研究了负载在活性炭上的镍催化剂在乙醇气相羰化合成丙酸及丙酸乙酯反应中的应用，考察了各种影响反应的因素。
A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
The microstructure and optical properties of epitaxial laterally overgrown (ELO) GaN films on Si (III) substrate by hydrade vapor phase epitaxy (HVPE) have been investigated. 用氢化物气相外延 (HVPE)方法在Si(III)衬底上成功横向外延生长出晶体质量较好的GaN薄膜材料。
The Virial equation was used to calculate the fugacity coefficients of vapor phase, and Antoine equation was used for the saturated vapor pressure of benzene and toluene. 用维利方程计算汽相的逸度系数,用Antoine方程计算饱和蒸汽压,用NRTL方程计算液相的活度系数。
The result showed that the contribution of vapor phase was very important to the total PAHs emitted, while particulate phase contributed most of the total carcinogenicity. 结果表明:在室温下燃煤排放的多环芳烃总量以在气相中存在为主,但总体毒性则主要存在于颗粒相中;