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- Recent advances in the direct synthesis of dimethyl ether from syngas in three-phase reactors are reviewed with emphasis placed on the cases in China. 综述了国内外特别是国内三相床反应器中由合成气直接合成二甲醚的研究和开发新进展。
- The pesticide products of diketene produced by direct synthesis or biosynthesis were introduced. 介绍了由双乙烯酮直接合成或由其衍生物合成的农药品种。
- This paper describes the direct synthesis of octyl\|glucoside with supported heteropolyacid catalysts. 本文以负载型杂多酸为催化剂,以葡萄糖和正辛醇为原料,直接法合成辛基多苷。
- The technics of glycerol monolaurate byUsing direct synthesis of glycerin and laurel acid has been research . 研究了直接酯化法合成单月桂酸甘油酯(GML)工艺,产物GPC测定纯度45%25。
- Chemical equilibrium in direct synthesis of dimethyl ether from syngas was calculated and analyzed by using an appropriate thermodynamic model. 选用合适的热力学模型,对合成气直接合成二甲醚的反应进行了化学平衡分析。
- Recent advances in direct synthesis of trialkoxysilanes from silicon and alcohols were reviewed, including the raw material, solvent, catalysts and reaction conditions. 摘要综述了硅与醇直接合成三烷氧基硅烷所用的原料、溶剂、催化剂以及催化反应的工艺条件。
- The effects of different solvent,temperature&concentration on the selective proportion of direct synthesis of p-bromophenol,o-bromophenol&2,4-dibromophenol have been studied. 研究了在非极性溶剂和部分极性溶剂中以苯酚为原料进行直接溴化反应。
- The effect of reaction temperature on reaction activity and selectivity of dimethyl dichlorosilane (DDS) in direct synthesis process has been investigated experimentally. 实验研究了直接法流化床合成甲基氯硅烷过程中反应温度对反应活性和二甲基二氯硅烷(DDS)选择性的影响。
- The reactor of the direct synthesis triethoxysilane was analysized. It can be classified as gas-solid reactor and gas-liquid-solid reactor based on solvents. 论述了直接法合成三烷氧基硅烷反应器研究结果,按有无溶剂可分为气-固反应器及气-液-固反应器。
- In this paper,direct synthesis of polylactic acid through solution polycondensation was studied,and the influence of solvents on molecular weight of polylactic acid was explored. 采用溶液缩聚法直接合成聚乳酸,主要探索了溶剂的种类对聚乳酸分子量的影响。
- Effect of ZrO2 on the surface structure and catalytic performance of bifunction catalyst for direct synthesis of DME[J].J Mol Catal(China),2002,17(3):168-172. ZrO2对合成二甲醚双功能催化剂表面结构及催化性能的影响[J].;分子催化;2002;17(3):168-172
- The appropriate conditions for the direct synthesis of pre-polymer of PLLA via melt solid-state polycondensation were prepared with an composite catalyst. 以L-乳酸为原料,采用复合催化剂熔融缩聚的方法,制备预聚物,然后进行固相缩聚研究。
- Recent progresses in the study on the conversion of syngas to ethylene glycol, including direct synthesis by syngas and indirect synthesis by methanol and formaldehyde or oxalate, are introduced. 摘要介绍了合成气合成乙二醇的工艺进展情况，包括合成气直接合成法、甲醇甲醛合成法和草酸酯法等。
- They got the raceme of bunolol at first and then bunolol was firstly resoluted with chiral column of HPLC by Lars Olsen in 1993. In 1995 the direct synthesis of levobunolol was reported by Alberto Stampa Diez Del Corral firstly. 1993年Lars Olsen等首次对其消旋体进行拆分； 1995年Alberto Stampa Diez Del Corral首次报道左布诺洛尔的直接合成法。
- The perovskite-type metal oxides supports and the corresponding supported Pd catalyst were prepared by microwave, and characterized by XRD, SEM and used in the direct synthesis of diphenyl carbonate (DPC). 摘要利用微波法制备了钙钛矿型复合氧化物载体及把负载钙钛矿型催化剂，用XRD和SEM对载体及催化剂进行了表征，并将微波法制备的催化剂用于一步氧化羰基化合成碳酸二苯酯(DPC)实验。
- Such a strategy is based on the direct synthesis of molecularly imprinted polymeric fibers (monoliths) using silica capillaries as molds, with silica being etched away after polymerization. 这种技术以二氧化硅毛细管为模型直接合成分子印迹聚合纤维（单体），聚合完成后除去二氧化硅。
- Furthermore, according to the properties of H-ZSM-5 and Fischer-Tropsch synthesis (FTS), a novel zeolite capsule catalyst was designed and used successfully for the direct synthesis of light iso-paraffins from syngas (CO+H_2) via FTS reaction. 此外，根据H-ZSM-5沸石膜的催化裂解和异构化的性质，结合基于普通Co/SiO_2催化剂的费托合成反应的特点，设计出一种新颖的沸石膜胶囊催化剂。 在费托合成反应中，该催化剂对于轻质异构烷烃的直接合成表现出良好的选择性。
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。
- The causes after the poisoning deactivation and thermal deactivation of bifunctional catalysts for direct synthesis of dimethyl ether (DME) from biomass syngas and the countermeasures were reviewed. 摘要概述了生物质气一步法合成二甲醚双功能催化剂的热失活、中毒失活的原因及其解决方案。
- I'll book you on a direct flight to London. 我将为你预订直飞伦敦的航班。
