二苯甲烷必定有一个二质子的峰。
催化烷基氯和苯的反应，其中二氯甲烷和苯反应得到5倍量的单一产物二苯甲烷。
This system also can catalyze the reaction of benzene with alkyl chloride, in which only the desired diphenylmethane is isolated in good yield (5 equiv. ).
研究表明用醋酸铁作催化剂不仅可以使二苯甲烷的转化率增加，而且可使反应速度加快。
The results show that the application of iron acetate catalyst can not only promote diphenylmethane conversion, but also accelerate the reaction rate.
综述了国内外4，4’二苯甲烷二异氰酸酯（MDI）的工艺技术、生产及市场供需现状。
Status quo of the technology, production, and market at home and abroad of 4,4'-diphenylmethane-diisocyanate (MDI) was summarized.
结论：化合物1是一个新的二苯甲烷类衍生物，化合物2 - 6皆为紫玉盘属植物中首次分到。
CONCLUSION: compound 1 was a new diphenylmethane derivative, and compounds 2-6 were isolated from the genus Uvaria for the first time.
以环氧树脂为基体，间苯二胺和氨基二苯甲烷的低融点混合物为固化剂，铜粉为导电填料，制备了热固化各向同性导电胶。
Copper conductive adhesives were prepared using epoxy as matrix, the mixture ofm-phenylenediamine and diaminodiphenylmethane as hardener, and copper particles as the con-ducting filler.
介绍了以二苯甲烷二异氰酸酯(MDI)、多元醇、甲苯和磷酸三丁酯为原料合成橡胶地毯用静电植绒胶的中试工艺路线。
The technology of pilot scale run of electrostatic flocking onto rubber rug with MDI, polyols, toluene and tributyl phosphate as the raw materials was reviewed.
以环氧树脂为基体，间苯二胺和二氨基二苯甲烷的低融点混合物为固化剂，铜粉为导电填料，制备了热固化各向同性导电胶。
Copper conductive adhesives were prepared using epoxy as matrix, the mixture ofm-phenylenediamine and diaminodiphenylmethane as hardener, and copper particles as the conducting filler.
由邻甲苯胺和甲醛水溶液反应合成得到了高纯度的3，3 -二甲基-4，4 -二氨基二苯甲烷（MDT），并对其性能进行了表征。
The polyimide monomer of 3,3 -dimethyl-4,4 -diaminodiphenylmethane(MDT)was synthesized through the reaction between O-methyl aniline and aqueous formaldehyde solution.
综述了二苯甲烷双马来酰亚胺的3种主要合成方法，讨论了若干合成工艺问题以及对产品质量的影响因素，介绍了BDM 产品的热行为特征与纯度、杂质的关系。
The three synthetic methods of bismaleimides and the some problems during synthesis and the thermal behavior of BDM products are reviewed with 34 references in this paper.
本文报道了利用差示扫描量热仪（DSC）跟踪4，4’-二氨基二苯甲烷四缩水甘油基环氧树脂（TGDDM）与4，4’-二氨基二苯甲烷（DDM）固化体系的固化反应研究的结果。
Studies on the cure reaction of tetraglycidyl 4 , 4'-diaminodiphenyl methane (TGDDM) epoxy with 4, 4'-diaminodiphenyl methane (DDM) has been made by using differential scanning calorimetry (DSC).
最后，炼油厂排放很多的气体，如二氧化硫(SO2)、二氧化氮(NO2)、二氧化碳、一氧化碳、甲烷、双环氧乙烷、氟化氢、氯、苯和其他气体。
Finally, refineries emit many gases like sulphur dioxide (SO2), nitrogen oxide (NO2), carbon dioxide, carbon monoxide, methane, dioxins, hydrogen fluoride, chlorine, benzene and others.
用活性碳吸附管采集大气中的苯系物，二氯甲烷替代二硫化碳作为脱附剂，毛细管气相色谱分离分析。
BTEX in air were adsorbed by active carbon tube, replaced carbon bisulfide by dichloromethane as reagent, analyzed by using Capillary GC-FID.
以丙烯酸酯为单体，二乙烯基苯为交联剂，三氯甲烷为致孔剂，采用悬浮聚合法合成了轻度交联的多孔丙烯酸酯类吸油树脂。
Using acrylate as monomer, divinyl benzene as crosslinking agent, chloroform as microvoid agent, acrylate resin was synthesized by means of suspension polymerization. It had low crosslinking density.
说出来吓死你，死尸会释放出苯，二氯二氟代甲烷等一系列奇怪的化学物质。然而也正是这些物质帮助了科学家找到各种隐秘的墓穴。
Dead bodies emit a surprising array of chemicals, from benzene to freon, which can help forensic scientists find clandestine graves.
辅助稳定剂为二苯甲酰甲烷、硬脂酸或聚乙烯蜡或其复配物。
The assistant stabilizing agent is dibenzoyl methane, stearic acid, polyethylene wax or compound thereof.
一种清除口香糖残渣的清除剂由二硫化碳、二氯甲烷、乙酸乙酯、司班-80、环己酮及十二烷基苯磺酸钠及水组成。
The scavenging agent for scavenging the chewing gum residual consists of carbon disulfide, methylene dichloride, ethyl acetate, span-80, cyclohexanone, sodium dodecyl benzene sulfonate and water.
本发明还涉及用有效量的至少一种式（I）二硫杂环戊烷化合物使至少一种二苯甲酰甲烷衍生物对辐射光稳定化的方法。
This invention also relates to a light stabilizing method for at least one dibenzoylmethane derivative with effective amounts of at least one dithiolane compound (I).
采用自行设计制造的重氮甲烷发生装置，有效控制了二甲基亚硝基苯磺酰胺的反应用量，减少了有害气体的排放。
By adopting the self-designed diazomethane generating device, the dosage of reaction reagent of diazald was effectively controlled and the harmful gas release was reduced.
已知的是，二苯甲酰甲烷及其衍生物对紫外辐 射相对敏感，且它们在日光作用下迅速分解。
It is known that dibenzoylmethane and its derivatives are relatively sensitive to ultraviolet radiation and they decompose rapidly under the effect of sunlight.
前言：以邻苯二酚和二氯甲烷为原料，二甲亚砜为溶剂，在碱性条件下合成1，2-亚甲二氧基苯，产品收率达到73.4%；
2-(methylenedioxy)benzene is synthesized by using catechol, dichloromethane and dimethylsulfoxide with the condition of alkali and normal pressure. Overall yield of the process is 73.4%.
前言：以邻苯二酚和二氯甲烷为原料，二甲亚砜为溶剂，在碱性条件下合成1，2-亚甲二氧基苯，产品收率达到73.4%；
2-(methylenedioxy)benzene is synthesized by using catechol, dichloromethane and dimethylsulfoxide with the condition of alkali and normal pressure. Overall yield of the process is 73.4%.
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