bf4 counter tube是什么意思

用法例句

Design calculation steps of trifluoromethane fire extinguishing system have been introduced.

介绍了三氟甲烷灭火系统设计计算流程,灭火剂设计用量、流体计算等设计参数的确定方法。

In order to treat the greenhouse gas, trifluoromethane (CHF3), via incineration process, the CHF3 should be separated from the gas mixture of CHF3 and HCl, which is the tail gas produced during the production of refrigerant HCFC-22.

测定了三氟甲烷和氯化氢气体在烷烃、氯代烃、醇、酮、醚、酯等几种有机溶剂中的溶解度,比较了这两种气体在不同溶剂中的溶解度差别,讨论了采用溶剂吸收法对其混合气体进行分离的可能性。

Vapor-liquid equilibrium(VLE) data for the R23(trifluoromethane) + R116(hexafluoroethane) system were measured at temperatures of 194.

利用气相循环法的实验装置测量了R23(三氟甲烷)+R116(六氟乙烷)二元体系在5个温度(194。

Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;

催化氧化三氟乙醇制备三氟乙醛和三氟乙酸

Some trifluoethoxylpyridine ether derivatives were successfully synthesized by reacting 4-nitro-pyridine-N-oxide derivatives with trifluoroethanol in the presence of alkali.

在催化剂碘化亚铜作用下,用卤代芳烃衍生物与2,2,2-三氟乙醇钠进行反应,制得芳烃三氟乙基醚。

Physical and chemical properties of trifluoroethanol were introduced.

介绍了三氟乙醇的物理和化学性质,叙述了三氟乙醇的不同合成方法及其在医药、溶剂、热力工质等领域的应用研究进展。

Application of ASPEN PLUS in Nitrogen trifluoride-Carbon tetrofluoride Azeotropic Distillation;

ASPEN PLUS软件在三氟化氮-四氟化碳体系共沸精馏中的应用

In order to prolong the useful life of electrode and improve the efficiency of current,and to reduce the pollution of nickel on electrolyte and the cost of producing NF_3,the nickel anode was substituted by carbon anode in the course of producing nitrogen trifluoride(NF_3).

为提高电极的应用时间、提高电解槽的电流效率、降低镍对电解质的污染和降低生产成本,将现行制备三氟化氮(NF3)的阳极材料由镍换为碳。

These(preliminary) studies indicate that the boron fluoride with nitromethane or acetone system with higher separation factor is superior to the anisole system used currently,but a more detailed study is.

采用苯甲醚、硝基甲烷、丙酮、甲基异丁基甲酮4种络合剂分别与三氟化硼合成出了4种络合物体系。

The isotopes of boron,~(10)B and ~(11)B,were separated by means of a gas-liquid chemical exchange reaction and distillation involving the isotopic equilibrium between gaseous boron fluoride and a liquid boron fluoride-donor molecular addition complex.

设计了合成络合物体系的实验反应器,并用这些络合剂分别与三氟化硼合成了4种络合物体系。

Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;

催化氧化三氟乙醇制备三氟乙醛和三氟乙酸

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯(PET)纳米纤维,选择苯酚和四氯乙烷,三氟乙酸,三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝,通过扫描电子显微镜(SEM)对纤维表面形态进行观察,结果表明:三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

We have reported a novel derivative of(L)-cysteine hydrochloride monohydrate in which the sulfur was protected by the acetamidomethyl(Acm) in trifluoroacetic acid reagent.

以L-半胱氨酸盐酸盐水合物为原料,在三氟醋酸溶剂体系中对巯基(—SH)进行乙酰氨甲基(Acm)保护,可制得标题化合物。