催化剂用量     The results showed that the reaction at 110 ～ 160 ℃ for 2 h,molar ratio of phydroxybenzoic acid to pentanol was 3∶1,the catalyst dose 1.5 g,the yield of esterification reached 93.3%?      结果表明:反应的酸醇比为1∶3,催化剂用量1.5g,反应温度110～160℃,反应2h,酯产率可达93.3%。     The synthesis of N, N′-bi(2,2,6,6-tetramethyl-4-piperidyl)hexanediamine from 2,2,6,6-tetramethyl-4-piperidone and 1,6-hexanediamine was studied. The effects of catalyst dose, reaction temperature, reaction period and solvent for this reaction were optimized. The reaction conditions were established as follows: catalyst dose, 20% of imine in mass;     研究了2,2,6,6 四甲基4 哌啶酮与1,6 己二胺两步法常压合成N, N′双(2,2,6,6 四甲基4 哌啶基)己二胺的方法,并考察了催化剂用量、反应温度、反应时间及溶剂对反应的影响,确定了最佳反应条件。     Reuslt indicated that the optimum gas feed rate was 600mL/min, optimum catalyst dose was 5g/L, optimum system temperature was 25℃.     催化剂用量最佳值为5g/L;     The affecting factors such as concentration and dosage of nitric acid, reaction pressure, reaction time and catalyst dose were investigated.     探讨了影响对硝基苯甲酸产率的因素，如硝酸的浓度和用量、压力、反应时间及催化剂用量等。     Investigates the effects of epoxide molecular weight and dose and catalyst dose on the major physico_chemical properties of fibroin membrane by using cross linkers of epoxides with different molecular weight in the membrane preparation.     采用自行研制的不同分子量的环氧化合物作为制备丝素膜的交联剂 ,探讨了环氧化合物分子量及环氧化合物添加量、催化剂用量对丝素膜主要理化性能的影响。     The effects of mole ratio of chloroacetic acid to ethyl alcohol, catalyst dose, water-carrying agent (cyclohexane) dose and reaction time on the yield of ester are tested.     研究了氯乙酸与乙醇的摩尔比、催化剂用量、环己烷的用量、反应时间诸因素对产品收率的影响。     Higher catalyst dose, higher reaction temperature, and more CO in the feed all resulted in less declines in SO2 conversion.     脱硫温度、催化剂用量、SO2与CO的摩尔比等对催化剂的耐氧性能均有明显的影响。

 

首页上一页1下一页尾页