转化率

Compared with other methods, the current one shows easy control reaction conditions, high percent conversion, low cost and high safety.

与大豆磷脂的其他改性方法相比，采用磷脂酶A_1进行水解，具有反应条件温和，转化率高，成本较低，产品安全性高等特点。

Traditional slice synthesis technics have been replaced gradually by the powder synthesis technics because of its high cost and low conversion rate.

传统的片状合成技术成本高，转化率低，已逐步被先进的粉末合成技术取代。

The hyaluronic acid production by batch and fed batch culture s in flask and fermentor was studied, and the primary mechanism was discussed.

在耗糖量相同的情况下，分批发酵比多次加料或流加发酵具有更高的HA产量和转化率；分批发酵初糖7％，发酵24h 左右，产HA3。

The biodiesel yield reached 95%. However, it was only 89.7% if the jatropha curcas oil wasn't extracted. A new technology of biodiesel production using jatropha curcas l oil as a feedstock was developed.

萃残液利用甲醇钙固体碱催化制备生物柴油，转化率从脱酸前的89.7%上升到95%，并据此提出了利用麻疯果油制备生物柴油的制备工艺。

The phase equilibrium data of SBO-FAME-Methanol, SBO-FAEE-Ethanol and Glycerol-FAEE-Ethanol systems were measured. The results indicated that it involved two different stages: liquid-liquid-solid reaction stage and liquid-solid reaction stage. When the molar ratio of methanol to oil is 12:1 at 65℃, the turning point is at a 55% biodiesel yield. The liquid-liquid-solid reaction model was proposed based on the double-membranes theory. It indicated that the process is reaction and mass transfer controlled together at the first stage, and the second stage is reaction controlled. The predictions of the model are matched with the experimental results.In the end, the acid was extracted using methanol and ethanol from jatropha curcas l oil.

测定了生物柴油制备过程中的SBO-FAME-Methanol、SBO-FAEE-Ethanol、Glycerol-FAEE-Ethanol三组分相平衡数据，表明固体碱催化过程分为液-液-固和液-固两个反应阶段，在醇油摩尔比为12：1、65℃的初始反应条件下，转化率达到55%时，为第一阶段向第二阶段的转折点；基于双膜理论建立了固体碱催化制备生物柴油的非均相液-液-固反应模型，表明两个反应阶段分别为传质、反应共同控制和反应控制，模型计算值与实验值吻合较好。

Jatropha Curcas oil was used as feedstock for producing biodiesel by transesterification,and adding sodium hydroxide,potassium hydroxide or sodium methoxide as catalyst respectively. The optimal conditions were obtained:molar ratio of methanol to oil 6∶1,reaction temperature 60 ℃,reaction time 80 min,mixing intensity 600 r/min,catalyst concentration for NaOH,KOH,or CH3ONa 1.2% of oil weight,The yield of biodiesel was above 97%. The physico-chemical indices of the biodiesel obtained met the quality standard ASTM of USA and DIN V of Germany.

选用了非食用油麻疯果油为原料，以氢氧化钠、氢氧化钾、甲醇钠为催化剂，通过酯交换法制取生物柴油，研究表明最适宜工艺条件为：醇油比6∶1，反应温度60 ℃，反应时间80 min，搅拌强度为600 r/min，催化剂用量为1.2%，转化率达到97%以上，且生物柴油各项理化指标均符合美国和德国测试标准。

The synthetic technique of anionic surfactant sodium dodecyl diphenyl ether disulfonate was studied.The best reaction conditions were determined.Alkylation was carried out with n∶ n=5∶1 at 70 ℃ for 5 h to attain 82% yield.

研究了十二烷基二苯醚二磺酸钠阴离子表面活性剂的合成工艺，得出烷基化的最佳反应条件为：催化剂用量为n∶n =5∶1；反应时间 5h ；反应温度 70℃；二苯醚的转化率 82 %。

Isoprene rubber was prepared with titanium catalyst modified by diphenyl ether ,and the effects of addition orders of various catalytic component on the monomer conversion,gel content and relative molecular mass were discussed in detail.

用二苯醚改性钛系催化剂合成了异戊橡胶，讨论了催化剂各组分加料顺序对单体转化率、产物凝胶含量和相对分子质量的影响。

The results indicate that high reaction temperature and low space velocity can improve the conversion of alkanes oxidation reaction.

结果表明较高的反应温度和较低的空速有利于提高烷烃氧化反应的转化率。

More research work is needed to ascertain the reaction mechanism to develop new, highly selective zeolite catalysts to increase the conversion of the alkenes.

提出应通过对此反应机理的深入研究以筛选出新的、高选择性的沸石催化剂以提高反应的转化率。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。