查询词典 iodic anhydride

To improve water solubility of betulin, two acyl groups were introduced at C-3 and C-28 hydroxy groups of betulin. 3, 28-di-O-glutaryl-betulin was synthesized with pyridine as solvent and DMAP as catalyst from betulin and glutaryl anhydride.

为了增强桦木醇的亲水性，对桦木醇的C-3位、C-28位羟基进行修饰，在吡啶作溶剂、二甲基氨基吡啶作催化剂的条件下，与戊二酸酐反应合成桦木醇戊二酸酯。

Epoxy acrylic resin and epoxy monoacrylate resin were synthesized from biphenol A epoxy resin and acrylic acid , then a new UV-curing resin was synthesized through the reaction of them and maleic anhydride.

本文先采用双酚A环氧树脂和丙烯酸合成了环氧丙烯酸酯和环氧单丙烯酸酯，再以它们和顺酐作为反应的原料，进行反应最终合成了一种新型UV固化树脂。

The kinetics on the hydrogenation of succinic anhydride to γbutyrolactone has been studied.

研究了琥珀酸酐加氢生成γ-丁内酯的反应动力学。

The effects of reaction conditions on the catalytic activity have been examined and a more than 95% yield of γ-butyrolactone obtained. Moreover, the above results are comparable with the catalytic activity of the same catalyst for hydrogenation of maleic anhydride.

结果表明，Cu/ZnO/Al2O3催化剂不但具有良好的顺酐加氢活性，而且在较温和的反应条件下对于1，4-丁二醇脱氢同样具有良好的催化活性，γ-丁内酯的收率可达95%以上。

A series of important basic and fine chemical products (such as 1,4-butyl -glycol,γ-butyrolactone, tetrahydrofuran, fumaric acid and tetra-hydride pa)can be produced when maleic anhydride is used as the raw material.

以顺酐为原料还可以生产1，4-丁二醇、γ-丁内酯、四氢呋喃、富马酸和四氢苯酐等一系列重要的基本化学品和精细化学品等。

The catalyst prepared by coprecipitation-impregnation has good catalytic performance of maleic anhydride hydrogenation to γ-butyrolactone.

共沉淀-浸渍法制备的20％CuO-20％SnO〓/Al〓O〓催化剂具有较好的顺酐加氢制γ-丁内酯活性，在280℃，顺酐转化率为94.4％，γ-丁内酯选择性为100.0％。

Over 5.4％CuO-10.8％NiO/TiO〓-Al〓O〓 catalyst, about 100％ selectivity to γ-butyrolactone at 100％ conversion of maleic anhydride was obtained at 200-270℃.

如使用5.4％CuO-10.8％NiO/TiO〓-Al〓O〓催化剂，在200-270℃，顺酐完全转化，γ-丁内酯选择性约为100％。

Through repairing the fixed bed calandria reactor during the molten salt leakage test in 2×104 t/a cis-butenedioic anhydride unit in Lanzhou Petroleum and Chemical Corporation,a pack of reasonable,practical and feasible technologic means was found to confirm the leakage points caused by molten salt and to repair it in reactor.

通过对兰州石油化工公司2×104t/a顺酐装置中的固定床列管式反应器熔盐渗漏的返修，摸索出一套实用、合理可行的熔盐渗漏漏点确认以及返修的工艺方法，可为类似反应器的制造提供一定的借鉴。

Compared with the Epoxy resorcinol-formaldehyde resin pretreatment system and Maleic anhydride pretreatment system developed by Xusigui, the 40% carbolated styrene-butadiene latex system can keep the composite"s properties and reduce the cost of pretreatment and simplify the pretreatment technology; especially to the HST 2073 latex system, the composite"s mechanics properties are improved greatly. Secondly, the composite"s comprehensive properties and interface performance are improved by reinforced with short fiber grafted with rubber in the surface. Thirdly, to simplify the production technology of composite, we add TKM-M and RF-90 as adhesive agent to the composite blended in an internal mixer, so as to the composite can be used to industry widely, then the effect of the amount adhesive agent on the composite"s properties and interface adhesive performance was studied, from the experiments the optimum amount of adhesive agent was deduced.

其中采用特软羧基丁苯胶乳预处理短纤维的方案，降低了预处理成本，相对许泗贵的低分子环氧和马来酸酐体系来说，预处理工艺大大简化了，而材料的力学性能保持良好，尤其是 HST 2073A 胶乳预处理体系，力学性能有较大幅度的提高；第二，通过对尼龙短纤维表面进行接枝橡胶分子链预处理，改善了复合材料的界面粘合性能，复合材料的综合性能也得到了相应的提高；第三，为了简化复合材料的生产工艺，使复合材料的应用得到工业化推广，我们选用TKM—M和RF—90长效增粘剂，直接加入短纤维橡胶复合材料中，采用密炼工艺，探讨了增粘剂的用量对复合材料界面粘合以及性能的影响，得出了增粘剂在复合材料中的最佳用量。

The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92.1%。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。