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- acetylenic thioether 乙炔型硫醚
- A series of various thioether moiety content PEEKK copolymers were synthesized through nucleophilic substitution route. 首先将通过亲核取代反应制备了一系列不同硫醚含量的聚合物,以及硫醚含量相同但连接方式不同的聚合物,结构表征证明这些聚合物具有相近的分子量。
- Transform rates of thioether can arrive at 100% when the feed ratio of water to thioether is adeq... 当水足量时,硫醚脱硫率可达100%25,温度、压力、原料配比对平衡组成的影响很小。
- The results indicate that water needed by full aquathermolysis reaction increases with molecular weight of thioether. 计算结果表明:硫醚水热裂解反应所需的水蒸汽量随硫醚相对分子质量的增大而增多。
- The effect of reaction temperature of the formation on thioether dianhydride monomer was discussed. 讨论了温度对硫醚二酐形成的影响。
- The principal synthetic methods, production and application about the tertiary acetylenic alcohols in domestic and abroad are introduced in this paper. 本文介绍了国内外叔炔醇的合成方法、生产及应用。
- A novel polyamic acid containing thioether segments with excellent thermal stability and transpanency was synthesized and characterized. 合成了一种具有耐高温、氧化稳定性及透明性的聚硫醚酰胺酸,并对各步中间产物进行了基本表征。
- The authors synthesized a new thioether compound whose molecular structure was identified by IR, MS and elementary analyses. 作者合成了新型的硫醚化合物,经元素分析、红外光谱和质谱分析,确证了化合物的分子结构。
- Sulfur compounds in Russian atmospheric gas oil were separated into thiophene and thioether compounds by the oxidation-reduction method using selective oxidant and reducing agent. 摘要采用选择性氧化剂和还原剂对俄罗斯直馏柴油中的硫醚类硫化物和噻吩类硫化物分别进行分离和富集,得到两者的浓缩液。
- Though adjusting the content and distribution of thioether moiety, we synthesized a series of novel poly (ether ether ketone) containing thioether moiety. 调整硫醚结构的含量及其序列分布,制备出一系列新型含硫醚结构聚醚醚酮。
- Firstly, we studied the carbozincation of acetylenic sulfones with organozinc reagents, which include allyl zinc bromide, benzyl zinc bromide, aryl zinc chloride, alkyl zinc chloride and diethyl zinc. 研究了烯丙基溴化锌、苄基溴化锌、芳基氯化锌、烷基氯化锌等有机锌试剂与炔基砜的碳锌化反应。
- The structure of the product 1,3-diphenyl-3-(p-methyphenyl)-2-(p-tolylsulfonyl)-2-propen-1-ol was determined by X-ray diffraction analysis, which suggests that the addition of aryl Grignard reagents to acetylenic sulfones is in the anti-fashion. 产物(z)-1,3-二苯基-3-对甲基苯基-2-对甲苯砜基烯丙醇的结构经X-Ray单晶衍射分析确证为Z-型结构,说明芳基溴化镁与炔基砜的加成为反式加成。
- Butynediol produced from acetylen(?) and formaldehyde contains about 1% of an unknown byproduct which is separated by distillation, extraction, recrystallization and column chromatography. 甲醛炔化制1,4-丁炔二醇的反应副产物中未知物约1%25,采用蒸馏、萃取、重结晶、柱层析等方法分离出未知物,纯度可达97%25左右。
- Sulfur compound types of mercaptan, thioether, and tetrahydro-thiophene in gasoline were easily be removed by adsorption desulfurization, but disubstituted thiophene was difficult. 吸附脱硫工艺中,硫醇、硫醚、四氢噻吩类化合物最易脱除,受空间位阻的影响,取代噻吩比噻吩难脱除;
- The 2,3-di(2,3-epoxypropyl thioethylthio)propyl 2,3-ep ox ypropyl thioether(TGEBES) was synthesized from epichlorohydrin(ECH) and 2,3-dim ercaproethylthio-propanethiol(BES) which was synthesized from ECH, thiolethanol and thiourea. 利用间接法以巯基乙醇和环氧氯丙烷 (ECH)为原料通过 3步反应得到 2 ;3 二 (2 ;3 环氧丙硫乙硫基 )丙基·2 ;3 环氧丙基硫醚型环氧树脂 (TGEBES) ;其折射率和环氧值分别达 1.;5 85 0和 0
- Transform rates of thioether can arrive at 100% when the feed ratio of water to thioether is adequate, temperature and pressure and larger feed ratio have little effects on equilibrium composition. 当水足量时,硫醚脱硫率可达100%25,温度、压力、原料配比对平衡组成的影响很小。
- Free energy minimization method is used to study equilibrium composition of thioether in aquathermolysis reaction.The effects of temperature, pressure and feed ratio are analyzed by calculations. 摘要采用自由能最小化方法计算硫醚水热裂解反应的平衡组成,分析温度、压力、原料配比等因素对化学平衡的影响。
- Sulphur and oxygen both belong to the sixth main group element together, they can form some similar chemical compounds on structure, Such as thiols (mercaptan), thiophenol and thioether. 1995年3月,日本邪教奥姆真理教施放沙林毒气,发生了震惊世界的“东京地铁投毒事件”,造成了大量人员伤亡。
- polyoxyethylenated acetylenic glycol 聚氧乙烯化炔二醇
- Favorskii-Babayan acetylenic alcohol synthesis [化] 法沃尔斯基-巴巴扬炔醇合成