助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   酸点 的翻译结果: 查询用时:0.009秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

酸点
相关语句
  “酸点”译为未确定词的双语例句
     IR study showed that the Fe3+, Mg2+ and Na+ salts of H3PW23O40 have both Lewis acid and Bronsted acid sites.
     红外法研究结果表明12-钨磷酸Fe~(3+)、Mg~(2+)和Na~+盐都具有L酸点和B酸点
短句来源
     The distributor is made of 304L and 316L stainless steel with 41 distribution points per square meter.
     分配装置由304L和316L不锈钢制作,分酸点密度为41个/m2。
短句来源
     Trough acid distributor is adopted with acid distribution density of 43 points per square meter.
     采用槽管式分酸器,分酸点密度为43个/m2,设可调闸板以保证各槽酸量均匀;
短句来源
     It is found that the active centres of cross oxidative coupling are also the species Li +O - as suggested in methane oxidative coupling and that seats of L acid are adsorption centres of cross coupling, and that selection of C 2 and C 8 are controled by the centres (Li +O -, L acid).
     结果表明 ,其活性中心也主要是Li+O- ,合适的L酸点是本交叉偶联反应中反应物的吸附中心 ,Li+O- 和L酸点是决定偶联反应产物C2 和C8的主要因素。
短句来源
     pH values on equi - acidity points (pHeap) of NMD,EMD and CMD samples were measured.
     测定了几种天然锰(NMD)、电解锰(EMD)和化学锰(CMD)的等酸点pH值(pHeap);
短句来源
更多       
  相似匹配句对
     The Acid-Base Titration Using Double-Point Potentiometric Method
     碱双电位滴定法
短句来源
     A Little Amelioration of Two-point Electrical Potential Titration of Acid-Base
     碱双电位滴定方法的改进
短句来源
     Hyaluronic Acid
     透明质
短句来源
     The problems about grain are paid more and more close attention to the Wholeworld.
     问题。
短句来源
     Oleanolic acid
     齐墩果
短句来源
查询“酸点”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
没有找到相关例句


本文主要介绍缓蚀剂的现状及现场试验中高温残酸的点蚀问题。

Catalytic splitting of 4,4-dimethyldioxane-1, 3 (DMDO) to isoprene was carried out over P2O6/SiO2 catalysts. Active components of the catalyst, their favourable formation conditions, crystallinity, and crystallite size, surface acid sites, and their effects on the split reaction of DMDO were studied by using XRD, IR, DTA-DTG and NH3 adsorption. In the range of H3PO4/SiO2 = 0-2, XRD characteristic peaks of Si3(PO3)4 crystallite appear. When raising the H3PO4/SiO2 ratio from 2 to 8, peaks characterized by SiP2O7...

Catalytic splitting of 4,4-dimethyldioxane-1, 3 (DMDO) to isoprene was carried out over P2O6/SiO2 catalysts. Active components of the catalyst, their favourable formation conditions, crystallinity, and crystallite size, surface acid sites, and their effects on the split reaction of DMDO were studied by using XRD, IR, DTA-DTG and NH3 adsorption. In the range of H3PO4/SiO2 = 0-2, XRD characteristic peaks of Si3(PO3)4 crystallite appear. When raising the H3PO4/SiO2 ratio from 2 to 8, peaks characterized by SiP2O7 arise. High temperature and long period calcination favour the formation of Si3(PO4)4 crystallite. The IR absorption peaks 1040 and 1120cm-1 are the characteristics of the stretching vibration of P-O-P and P-O-Si bond respectively. IR spectra of adsorbed NH3 on P2O5/SiO2 show that 1475cm-1 observed at 10-5 torr (300℃) may be ascribed to the stretching vibration of NH4+ and 1260cm-1 may be ascribed to NH3 on Lewis acid sites.The results prove that the crystalline phase [Si3(PO4)4 of P2O5/SiO2 catalyst (with acid ratio 0.6) acts as the active phase of the catalyst. In order to get enough active phase Si3(PO4)4, it is necessary to prepare the catalyst by calcination at above 700C for 10 h. In fact, calcined at 850C for 10 h gives catalyst of good thermal stability. Activity tests show that DMDO is splitted to isoprene-with about 85% selectivity and high yield (350g/l·h) at 280℃ and a space velocity 7750 h-1 on the catalyst with 0.6 acid ratio calcined at 850℃ for 10 h.

本文对4,4-二甲基二氧六环-1,3裂解制异戊二烯的P_2O_5/SiO_2催化剂,用XRD,IR,DTA-DTG及NH_3吸附等方法,研究了其活性相的形成条件、结晶度以及它们对裂解反应的影响。结果证明配酸比为0.6的P_2O_5/SiO_2中的晶相Si_3(PO_4)_4是活性相,P_2O_5/SiO_2在>700℃,10小时的条件下,能充分形成这种结构,热稳定性良好。水分子使P_2O_5/SiO_2表面产生的B酸点和L酸点,在反应中发挥协同作用。

IR study showed that the Fe3+, Mg2+ and Na+ salts of H3PW23O40 have both Lewis acid and Bronsted acid sites. The relative acid strength of salts of H3PW12O40 determined by Benesi's method is roughly as follows.(Al3+, Fe3 + , La3+, Cu3 + , Cd3+)>Zn2+ >(Ca2+, Mg2 + )(Na+, Li+)The total acidity of H0≤+ 6.8 related approximately linearly with ionic potential and the electronegativity of the countercations. The acid quantity varied with the calcination temperatnre, showing maximum at 200-250℃.The somewhat different...

IR study showed that the Fe3+, Mg2+ and Na+ salts of H3PW23O40 have both Lewis acid and Bronsted acid sites. The relative acid strength of salts of H3PW12O40 determined by Benesi's method is roughly as follows.(Al3+, Fe3 + , La3+, Cu3 + , Cd3+)>Zn2+ >(Ca2+, Mg2 + )(Na+, Li+)The total acidity of H0≤+ 6.8 related approximately linearly with ionic potential and the electronegativity of the countercations. The acid quantity varied with the calcination temperatnre, showing maximum at 200-250℃.The somewhat different form of the graphs of catalytic activity versus acidity of catalysts on dehydration of isopropanol and isomerization of butene-1 might be due to that the former reaction occured in the bulk of the catalysts.

红外法研究结果表明12-钨磷酸Fe~(3+)、Mg~(2+)和Na~+盐都具有L酸点和B酸点。用Benesi法测得10种12-钨磷酸盐的酸强度顺序为(Al~(3+)、Fe~(3+)、La~(3+)、Cu~(2+)、Cd~(2+))>Zn~(2+)>(Ca~(2+)、Mg~(2+))>(Na~+、Li~+),其酸量与抗衡阳离子的离子势和电负性大体成线性关系。还看出酸量与所含结晶水量有关。催化剂的酸量与其对异丙醇脱水反应和丁烯-1异构化反应的催化活性的关系表现出不同的特征,这可用“体相型”和“表面型”催化作用的不同特点来解释。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关酸点的内容
在知识搜索中查有关酸点的内容
在数字搜索中查有关酸点的内容
在概念知识元中查有关酸点的内容
在学术趋势中查有关酸点的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社