氟化反應 的英文怎麼說
中文拼音 [fúhuàfǎnyīng]
氟化反應
英文
fluoridation-
Using bf3 - et2o as a catalyst, the title compound was synthesized from allyl alcohol and epichlorohydrin by a series reaction included addition and cyclization
烯丙醇和環氧氯丙烷在三氟化硼乙醚絡合物的催化作用下進行加成和環化反應制得標題化合物。It is shown that the effect of pac removing fluoride is closely related to ph value and the optimum range of ph value is between 6. 1 ? 7. 1. under this condition, further studies are made on the optimum coagulant dosage, mixing time, artificial turbidity, filtration rate and filter bed ' s depth and the optimum range of these parameters have been determined
堿式氯化鋁的除氟能力與原水的ph值有密切的關系，除氟最佳ph值范圍為6 . 1 ? 7 . 1 。在此條件下，進一步對最佳投藥量、混合時間、反應時間、人工輔助投加濁度、濾速及濾層厚度進行了研究，確定了其最優的取值。Hydrofluoric acid will react with carbon steel and monel producing a fluoride buildup on the metal surfaces which can render the valve inoperable
氫氟酸會與碳鋼和蒙乃爾發生化學反應，產生氟化物，聚積在金屬表面，從而致使閥門無法正常工作。The compounds are prepared by the epoxidization of dinitrofluoromethyl olefins with peroxytrifluoroacetic acid.
這種化合物，由二硝基氟甲基烯烴與過氧化三氟醋酸進行環氧化反應而得到。Flumiclora - pentyl was prepared from p - fluorophenol as starting material via several steps such as chlorination, nitrification, reduction and condensation. the yield of the product was 50 %, and the purity was higher than 97 %
摘要以對氟苯酚為原料，首先與氯氣發生反應，生成2 -氟4 -氯苯酚，再經過硝化、還原、縮合等幾步反應得到氟胺草酯，反應總收率達到50 % ，產品純度大於97 % 。Study on the macrokinetics of catalytic reaction of sulfuryl fluoride synthesis
催化合成硫酰氟宏觀反應動力學研究The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film
試驗結果表明：所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機填料會使復合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應；碳纖維表面含有c = o及c - o - c等極性基團，有利於提高其與其它組分的相容性，提高層間剪切強度；均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系，擬合曲線基本能表示各配方的摩擦系數發展趨勢；配方中不加銅粉或不加石墨，其摩擦系數均較高，說明銅粉和石墨應該配合使用；當銅粉15份、石墨60份時，銅粉30份、石墨30 - 40份時，銅粉60 、石墨15 - 30份時，摩擦系數均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時結晶度最大，磨損量也是三者中最大的；同時，固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的：不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤滑轉移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。The etching reactor is developed to obtain reproducible tapers of desired diameter and length. an approach for on - line monitoring of etching using the power meter is demonstrated. based on the experimental data, the relationship between the leak - out optical power and change of time and also that between the leak - out power and width of the remaining width of cladding, and the fiber length exposed to hf acid are summarized
本文對氫氟酸腐蝕法製作光纖耦合器的反應裝置和實驗系統進行了設計，介紹了具體的實驗過程及其注意事項，通過對實驗結果進行分析總結，得出泄漏光功率隨腐蝕時間的變化關系以及泄漏光功率與包層剩餘厚度和腐蝕長度的關系。In the case of the unsaturated alcohols, such as hydroxyethyl acrylate ( hea ), the paes showed the photo - alignment property to the nematic liquid crystals with the pretilt angle of 0. 60 ? secondly, three kinds of fluoro - containing diamine monomers were prepared via the reduction reactions of the corresponding dinitro compounds, which were synthesized via the nitro nucleophilic displacement reactions of 3, 5 - dinitro - 5 - trifluoromethyl benzene with diphenol compounds
此外，本論文還設計並通過3 ， 5 -二硝基三氟甲苯與二酚化合物的硝基親核取代反應制備了二硝基化合物，將其還原最終合成了三種間位取代的含氟二胺單體tfpda 、 tfbpda與tfmda ，並對其聚合行為進行了研究。In order to reduce the membrane ' s cost, we prepared the membrane by simultaneous radiation grafting of styrene onto teflon - polytetrafluorethylene films and subsequent sulfonated by the chlorosulfonic acid introducing the activity sulfonic acid grape into the grafting side chains of the polymer films
在實驗中採用高能輻射技術，先將苯乙烯單體接枝到聚四氟乙烯聚合物基體上，后經氯磺酸磺化反應引入磺酸基團，合成了滿足燃料電池性能要求的質子交換膜。Synthesis of polyfluorobiphenyl liquid crystal compound by coupling reaction
偶聯反應合成多氟聯苯液晶化合物Due to the high reactant concentration the aquagel had a good strength. hence, the aging process can be saved and the preparing times of aerogels was shortened for this sol - gel system
由於增大反應物含量，所得水凝膠強度好，不需經過三氟乙酸老化，縮短了氣凝膠合成周期。The reaction mechanism and the latest research status of displacement fluorination of aromatics are summarized, and the development trends are forecasted also
摘要綜述了芳香族置換氟化的反應機理與最新研究狀況，並展望了其未來發展前景。Chemical industry : sodium carbonate ( the production of hydrochloric acid, hypo - fluoric acid and secondary chemicals ) ; the production of fluoride and chemical fertilizers ; circulation of reaction liquid in gas absorption tower ; grease extraction ( sulfuric acid ) ; reclamation and regeneration system of waste acid ; transportation of strong acids between chemical plants and vehicles
化學工業：碳酸鈉化工業（鹽酸、次氟酸、二次化學品的生產） ；氟化物、化學肥料的生產；氣體吸收塔反應液體循環；油脂提煉（硫酸） ；廢酸類的回收及再生系統；化工廠和運輸車輛間的強酸類輸送。Germanic norfloxacin was prepared for the first time via the reaction of sodium norfloxacin and germanic chloride in pyridine solvent, yield90
首次以吡啶作溶劑，用氟哌酸鈉與四氯化鍺反應，合成了氟哌酸鍺，收率90 。New york ( reuters health ) dec 22 - positron emission tomography ( pet ) following infusion of [ 18f ] fluorodeoxyglucose ( fdg ) is an effective means of predicting response to neoadjuvant chemotherapy in patients with breast cancer, french researchers report in the december 1st issue of the journal of clinical oncology
紐約（路透社健康） 12月22日- 《臨床腫瘤學》雜志12月第1期上法國研究人員報道，對乳腺癌患者新輔助化療腫瘤的反應進行預測，正電子發射斷層攝影（ pet ）輸注[ 18f ]氟脫氧葡萄糖（ fdg ）是一種有效手段。An integrated fluorine supply strategy has been demonstrated to be the most effective means of implementing a safe and reliable fluorine supply to users seeking a low - cost replacement for standard chamber clean chemistries
對一般氣相沉積反應器清洗而言，一體化氟氣供應策略，對尋求低價取代方案的使用者而言，是最安全和穩定的供應方式。Principles of reactions in the synthesis of rare earth fluorides in re2o3 - nh4hf2 systems
2系合成稀土氟化物的反應規律Fluoroalkyl acetic acids were converted to their corresponding carbonyl chlorides, which was then reacted with o - amino benzaldehyde and ammonia gas to give 3 - ( 1 - iminofluoroalkyl ) - 1h - qunolin - 2 - ones in moderate yields
摘要用2 -氟烷基乙酸為初始原料，用氯化亞碸或五氯化磷將其轉化為相應的酰氯，後者在室溫與鄰胺基苯甲醛縮合，通入氨氣迴流反應得到3 - （ 1 -亞胺基氟烷基） 1h -喹啉2 -酮類化合物，產率中等。The formation process and mechanism are investigated : the adding of n ( ch2ch2oh ) 3 promoted the dissociation of cf3cooh in the starting solution and some non - volatile, fluorine containing intermediates can be remained after tray - drying of the solution. during the following heat - treatment process, the intermediates decomposed and further react with the rest amorphous calcium phosphate, leading to the final formation of fha or fa phase. the fluorine content in the fha phase obtained could be tailored by the content of cf3cooh added.
發現cf _ 3cooh只有在加入n （ ch _ 2ch _ 2oh ） _ 3的條件下才能形成fha相和fa相，其機理是：在溶液中加入n （ ch _ 2ch _ 2oh ） _ 3能夠促進溶液中cf _ 3cooh的離解，形成無揮發性的含氟過渡化合物，溶液快速乾燥后的中間產物中仍能保留過渡性的含氟化合物，在隨后的熱處理過程中，過渡化合物分解並與非晶態的鈣磷酸鹽反應最終生成fha相或fa相。分享友人